Ultimate pontiac head 27 with the original heads and only 9. Raised exhaust ports for superior flow. 3 to 1 vs 9. I am working with a stock bore spacing BBC and am just looking for the neato factor more than the ultimate performance head combo. FOLLOW @VisnerEngine for builds, info, and more Oct 8, 2017 · There's no question that Pontiac used 670 cylinder heads on its 400 and 428 in 1967, and those intended for the 400 Ram Air were equipped with special valves and springs. I have a set of 7H1 350 heads, and had assumed they were 1. Milled block or heads need to check to ensure the bolts don't bottom out. Found in muscle cars like the Pontiac Firebird and GTO, these heads are a favorite among hot-rodders and performance enthusiasts. Location: Vancouver, WA. Dan Whittmore worked for Pontiac as mechanic years ago. Those heads were 98cc heads, however if they were the 455 cid D port then they were rated at 114cc. After years of research and development we are excited to introduce to you, the finest cast water jacketed Pontiac cylinder head available. 96/1. Just throwing out a few more things based on a question in the dark. Crower SS are by far the best-have the biggest trunnion bearing out there. Casting quality is second to none, core shift and flashing non existent with the CV-1 head & above other aftermarket heads in all brands and makes of American They spent 2 days on the dyno, had custom cams ground to deal with the smaller exhaust valve/flow but to no avail. 65 Harland Sharps on my early E heads with HFT or larger roller springs hitting anything. 8L V6 with unique quirks and challenges, making it a real classic worth preserving. 9792995 head gasket measures . code WS and # 16 heads. Here are some of the numbers He gave me. Jan 29, 2016 · Edelbrock Heads spark plug reach Pontiac - Street. Not a good combo for a 455 with performance in mind. I am curious to know how much of a performance difference I can expect if I was to swap heads on my 66 Lemans. 77's. Pontiac reduced the angle to 14 in 1967, while the SBC was 23. 070. The EXh port on the HO heads flows 180 cfm to the average Exh flow of the 6X at 143 cfm. I think you looked at a pair of 716 heads also for sale. All Pontiac V8 cylinder heads from 1955 to 1976 are essentially interchangeable. A google search should net you more from the article. The '69 #48 and '68 #16 heads had screw-in rocker studs, the ports on both heads were essentially the same. X2 with Ed kind of , but to use the 2. Jun 3, 2009 · With the earlier HP/big valve heads you start out with a longer valve,so there's less room with the commonly available valve lengths. Like mentioned earlier, the 670 has a little bit deeper chamber[IIRC] than the #12 head, so you may be able to get away with a little more valve lift. 88/1. Nov 11, 2024 · Page 2- Steve Morris Doing Pontiac Heads Pontiac - Race Remember Me? Join us now! Menu Ultimate Warrior : Join Date: Feb 2004. 99 Jul 3, 2008 · Fel-pro always states in their catalog and packaging text that their headgaskets for the traditional pontiac V-8 (#1016 & #8518) are . 523. 090" valves replace the 4. Warp 6 - Here is the ultimate cylinder head for naturally aspirated engines. However, many non-Pontiac-printed sources show its compressed thickness at . Airflow testing Pontiac cylinder heads was. Nov 7, 2013 · Most non - high port 2 valve wedge chamber type heads will overall perform better Intake port wise if you do not go above a 90 % number in regards to the stock 30 degree Inatke valve seat used by Most Pontiac heads. 00 Apr 5, 2018 · Thanks John for the unique opportunity to save these. Tom May 12, 2006 · The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. exhaust ports Will accept 2. I've had 6x-8s on several Pontiac big cars, they are good heads but nothing special. Oct 21, 2013 · "The '64 9770716 GTO (and '63 -'64 421 HO) head has a 17 degree valve angle and uses 1. Pontiac used different valves and combustion chamber size for their V8s to change compression ratios, fuel economy, and horsepower output. All 1969 400 "RAIII" engines used #48 heads, except Firebird YW code wich also was the only "RAIII"using the 067 camshaft and #62 heads. I have access locally to a rebuilt pair of #12 (1970) heads which are the big valve 72 cc heads. Jun 1, 2019 · Based on parts manual information, Pontiac's "thin" No. 88 @ 105 so far Visner Billet Pontiac Block. Casting numbers/ bore spacing. Dec 23, 2021 · The HO heads we did were around . 177 valves and screw-in rocker studs to make them a fine performance head. These particular heads have been O ringed (Affects absolutely nothing) and knife edged back in the day by a VERY qualified Pontiac racer. There's a reason Kaufman came out with a D-port aluminum Head. Oct 28, 2014 · It said that all heads in 72 had the large 1. 275” rough bore. 11/. 66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3. Well, a lot of time gone by and only now am I getting the engine rebuilt. The pushrod hole on the 1965 heads is smaller, it keeps the pushrod in place. 800″ with a 2. 02" as is means using its low lift flow reducing 45 degree seat, you would be better off taking new 2. The ultimate Pontiac Race head ! ! Capable of 400 cfm intake flow. 010" if they clean up there) to a max of . Visner Engine Development, LLC 8603 Savannah Dr Saranac, MI 48881 Phone: 616-726-6600 Fax: 616-726-6601 Contact Us. I went out and measured, and sure enough, exhaust valves were 1. Dec 13, 2005 · 455 7m5 heads Pontiac - Street. For '64, the same head casting was also used for the big car Tri-Power 389 and all '64 GTO engines. 028 to . Stock 72 E-heads flow around 255 @ . Part Number: ARP-HSK contact us Get ready for a heart-pounding race under the lights at the legendary Spa Francorchamps, where the iconic Pontiac Firebird Trans Am ’78 goes head-to-head wit We fit our blocks with custom, Nitemare-exlcusive, Pontiac-specific torque plates that matches the thickness of Pontiac heads at each head bolt, to ensure that the block distorts exactly the same as it will with the heads installed so the bores end up perfectly round following final assembly for consistent piston-to-wall gaps and optimal ring seal. 60 The ultimate Pontiac Race head ! ! Capable of 400 cfm intake flow. that's the pressure drop that correlates with more HP on the dyno, as the flow numbers increase. 100" right off the bat,so you can see how that comes into play here. My Goat has the numbers matching 400 H. Dec 2, 2019 · Ran into a Pontiac expert at a cruise in several days ago and he wanted to show his buddies how much he knew about GTO's. The 5C flowed a little better than most heads, albeit only a few CFM, but they are certainly not junk. 4CR if 60 over. Makes for a combo on a 455+ cube that will spin a tire but falls on its face quickly due to port choke. com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts. RAIV bolts are a different length that typical Pontiac heads. So if hardened exhaust seats aren’t necessary or have limited benefits then why did the factory install those on what most would consider to be the ultimate evolution of the iron Pontiac head, the ‘73 - ‘74 455 Super Duty ? FEATURED PONTIAC ENGINE. May 31, 2004 · Im using 1. Intake ports measure 1 3/8" x 2 3/8" 1 3/4" dia. D. It's what we all were use too. Chevy small block heads of the same era used the small pushrod hole. 90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9. Dec 2, 2019 · Pontiac Cast Iron Cylinder Head BP ports more Pontiac cylinder heads than anyone in the world. 400, 275 @ 500, 285 @ 600 and 288-292 @ . 96 valves. 8-10 to 1 compression. Another bad deal about the 7M5's, those heads are only drilled/tapped for 4 (four) exhaust manifold bolts making headers pretty much un-do-able. port version ). If you wanted to go cheap a set of 63 326 heads would work. 030". Ultimate. Sep 23, 2020 · Hey everyone, I'm looking for some input from the other KRE D port Pontiac customers. The 4x heads were offered on 1973-1974 Pontiac 400 engines and did come both years with 2. Comparing #48/#12 heads with any #16/#31/#62/#13 head it is easy to see the difference of chamber size. ROLLER CAMSHAFT !! Butler Performance 535 cu. 200" and . My intension was to use them on my 1969 GTO once I got the engine rebuilt. Jan 29, 2016 · Making a Pontiac head with big ports and the Ram Air V port layout is is a great idea to get those troublesome center exhaust valves separated. Jan 30, 2002 · They spent 2 days on the dyno, had custom cams ground to deal with the smaller exhaust valve/flow but to no avail. com, the official website for High Performance Pontiac Magazine! Feb 2, 2003 · The 47 & 17 Heads are 350 heads and I believe they have 45 degree intake valve seats stock rather than the standard pontiac 30 deg. All three engines ran 4-5 tenths faster with the above changes. Mar 2, 2020 · Iron Pontiac heads: ARP bolts do use washers. 77" valves but pressed studs and was only used in 2-bbl applications. Pontiac engineers designed them for a smaller cube motor. 039" compressed,and 9. I believe the Pontiac head likes to see as much as 85% in/ex flow. Apr 29, 2020 · Speedmaster heads Pontiac - Race. May 4, 2018 · 17 heads have a smaller port than other Pontiac heads available. DCI 5 heads flow as cast 380+ cfm @ . highperformancepontiac. Jan 28, 2024 · Like has been mentioned. 2 compression where as the casting number 22 casting head is the casting number head that would have come on the 1965 285 hp 326 HO motor and would have had a factory stated 10. Apr 8, 2007 · reason being you may have a head that flowed average to all the others at 12", but it would really take off at 28". Many of the 1975 350 #46 heads will already have screw in studs, and make excellent heads for a 455 engine once opened up for the larger valves. 300". No question that this will be the highest horsepower producing Jan 24, 2017 · The optimum cam for RA-IV heads is not the same as the best cam we've found for d-ports. As far as what to look for what not to look for. There are two problems with them - the biggest one for a mild street performance application being that not only are they missing the end bolt holes on the exhaust flange, the material that's normally there that you could simply drill & tap on other heads isn't DCI Motorsports is your premier Pontiac engine builder since 1983. Oct 16, 2010 · Proper Head Gasket Thickness Pontiac - Street Ultimate Warrior : Join Date: Feb 2004 The local old school Pontiac guy tells me to leave at least . Intakes were 1. in. Head: Part I By Pete McCarthy. @dcimotorsports1111 Capable of 9 Apr 16, 2019 · The 6x-4 head 350's also used 2. Easily find your favorite songs by Marvin Pontiac! Chords and tabs, covering a variety of genres. 99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand Jul 3, 2008 · Fel-pro always states in their catalog and packaging text that their headgaskets for the traditional pontiac V-8 (#1016 & #8518) are . lbs. Jan 23, 2022 · As B. The car ran a best of 9. Pontiac Blocks- Bore & Stroke; Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Visner Performance THE ULTIMATE PONTIAC BLOCK (0) Reviews Apr 3, 2016 · replacing heads on 326 Pontiac - Street. 48s 65. 19" intake with a . Read more only at www. 16 compression. The Warp 6 Pontiac cylinder head! This is KRE's third aluminum Pontiac cylinder head that they have brought to the marketplace. You’ll also need to have the intake manifold flange port exit raised up 1/8” to RA4 gasket size and if you want to use all of that 300 cfm to make hp then that new RA4 gasket height needs to go all the way up the runner to where it meets the plenum. 25" intake you would have to shuffle over both valve guides to the exhaust side, install new seats and open up the combustion chamber to unshroud the new valve size, and thats a ton of work! I'm in a high school band and we are covering a few Black Pontiac songs for a concert soon. I don't think it's against any forum rules. " Feb 27, 2010 · There is a noticeable difference in performance switching to big valve heads. It appears that Kauffman, SD Performance and Tin Indian all have 5-axis CNC porting machines in house, all are involved in racing and all are priced from $2,400 to $2,445 for complete 74 cc heads. Different length bolts. He checked and recorded the ccs of untouched heads. it occurs inside Pontiac cylinder heads. I want somewhere in the 500hp or so range with headers. 8 compression, what horsepower will I have and is anybody running a lower compression 400 out there. 800" exhaust valves. 88"/1. 502/. I don't really know much about the company even though I've owned this car since 1996 and I'm in a spot where I would like to rebuild the engine with some performance heads on it. Also we found the IV heads like a little more gearing and a fin angle change in the converter. My heads were produced same month as car per date code. Dec 16, 2022 · Edelbrock head porting Pontiac - Street. 350" lift then any other D port Pontiac head, even the 421 980 casting. Heads and intake would be in the 4000-5000 range. 090 and never had an issue. 77 valve sizes came in all of the 72cc '68 #16 400 heads. 98" to 2. S. Those SM as cast numbers are a bit higher than we've seen on our super accurate NASA calibrated flow bench. 66 valves and press-in rocker studs, they originally came on 265 HP 2-barrel 350 engines in 1968. 4 cc's compressed volume,bore is listed as being 4. But to your screw in stud question. Apr 22, 2005 · I do not believe there were two different 48 heads. " Jan 15, 2007 · A set of 1970 #11 350 heads would be a perfect swap, milled for cleanup (I'd go . Sell the 6X-4 heads or save them for the 455 you really want to build later on. Head Flow Charts There seems to be a fine line between a skeptic and a cynic. Jun 22, 2013 · I have made the decision to purchase the Kauffman D-port heads CNC ported to the 290-295 CFM range. But just because Pontiac used 2. Mar 10, 2021 · This picture shows an area of concern with the SM head. 2-9. Feb 3, 2017 · The chambers in the #061 heads are probably the most "open" chamber design Pontiac ever produced. Heads like these are usually considered disposable. 300" intake and 1. This auction is for an original blueprint of the various Pontiac heads including the 9770716 421/GTO head and print dated 1961. 030 over), #96 Heads, Hedman headers, Wolverine 234/244 cam, Performer intake, Holley Sniper "Need a car to run blocker. I also got told just to place an ad for a set of ported iron heads that flow good because i want to get rid of my 71 455 heads. The future possibilities are endless with this head. Splayed 4-bolt billet main caps. Jan 14, 2008 · The mention of a sleeper head is in reference to an HPP article from the mid 90s. 88 @ 105 so far Jan 29, 2016 · Making a Pontiac head with big ports and the Ram Air V port layout is is a great idea to get those troublesome center exhaust valves separated. Head: Part II . Factory does not use washers. When the LS1 was introduced it was 14 or 15, newer LS7s use 12. 20 valve! Dec 2, 2019 · Pontiac Cast Iron Cylinder Head BP ports more Pontiac cylinder heads than anyone in the world. 92"/1. Oct 24, 2015 · I recently bought a 1965 Lemans with a Pontiac 400 from a '74 Grand Prix in it. are "Ram Air" heads, when they are not. The RA-IV heads required some manifold work to feed them. Skirted and cross-bolted mains. 7L 350ci V8 cylinder head (4X/6X) is synonymous with high performance. :-) We used a 5/16" stem on both and 45 degree seats. 750 deck height (+. She's been brought in for her first ownership clean up after dominating the roads. Jan 26, 2009 · So Thanks, Jim. Using the stock '67 to '70 length valves in the '71 up heads adds . The Roland head has a valve angle split, but that doesn't help a lot either and gives a pretty whacked rocker configuration. Feb 28, 2017 · 7J2 heads value 70-73 Firebird Ultimate Warrior : Join Date: Nov 2007 The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in Apr 3, 2016 · 7K3 are 1972 400-4bbl heads, used on all 4-bbl applications that year. How do I figure the compression ratio? The Warp 6 Pontiac cylinder head! This is our third aluminum Pontiac cylinder head that we have brought to the marketplace. If I use the 16 heads, I'll have 10. Jun 19, 2018 · These heads were superceded by the 544127 or '127' Super Duty heads in October of 1962. 60 with the 390 cfm heads. I knew the original head were really beat up from detonation, so I wanted better heads as replacement. Again, I don't think the OP is going for max power here. He proceeded to explain to me that the 16 heads were total junk. " Edelbrock Aluminum Pro Port Cylinder Heads. 10. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Now -- Re-designed to give you the ultimate in performance potential !! Heads without rocker shaft system - ONLY $1,100. This made me curious. You would have to run a 61-64 intake but they are avail. wallaceracing. 00 ea. 11 valves are not just automatically better for all Pontiac engines. Oct 27, 2018 · Pontiac Power RULES !!! www. Speedy car. 11 valves in heads that came with 1. May 8, 2009 · The chamber IS "similar" to the Ram Air chamber. 5 compression . One is a very efficient 330 plus cfm recommended for combinations up to 700 horsepower. 090" valves. My biggest concern was the head gaskets giving up but that never happened. 96's. 00 They spent 2 days on the dyno, had custom cams ground to deal with the smaller exhaust valve/flow but to no avail. Optimized combustion chambers. 060" or more, but that's just my preference, not saying it won't work. The key here is the right heads for a pump gas 400 with regular 4 valve relief pistons Feb 14, 2023 · Pontiac hardened valve seat issues Pontiac - Street. BUTLER PERFORMANCE introduces the ULTIMATE PONTIAC STREET ENGINE !!700+ HP and 700 ft. 77 valves, screw in studs. 033-inch thick. The. The 4x heads overall are an economic way to have heads that flow pretty Jan 3, 2014 · They are as good as any D-port head really, just they have a big tendency to be cracked. 99 In '63, Pontiac introduced the 421HO, using the 9770716 Head Casting. 00" with a 30 degree seat as stock. Not EXACT, but similar! IMO, the term "Ram Air head" should be reserved for small-chamber, round exhaust port heads. Nunzi tells me that he recalls Ram Air-spec 670s being identified by a small "X" stamped into the dime-sized disc over the center exhaust ports. No way will I mill Pontiac heads . 02" double hump Chevies come close. Aug 24, 2017 · The Ultimate Pontiac Head Wallace compares many heads and comes up with his opinion (disclaimer at beginning says take his flow numbers with a grain of salt, but he was consistent with his testing). As you go up in valve seat angle you can sneak up on higher % numbers as the valve seat angle gets larger. intake seat. The #061 head is an anomaly in several ways. We were armed with a 400-cfm laminar flow element (powered by six 1. 66 intake/exhaust ports. Not only is it the first open-chamber head (used in '67), it had large 2. engines did. 528511 (1958 370-cid 270-hp 4-bbl) Date cast: J277 Grade: 3 (3 cfm seat leakage) Valve sizes: 1. No 2. Apr 6, 2011 · The #17 heads have 1. The big valve heads also have guide plates. Find PONTIAC Headers Round Cylinder Head Port Shape and get Free Shipping on Orders Over $109 at Summit Racing! Ultimate Headers (35) Round Port, Buick Feb 14, 2003 · 7k3 heads Pontiac - Street. 11" valves and bringing them down to 1. She wa Dec 18, 2024 · Arguably one of Pontiac's most iconic cylinder heads, the 5. They feature raised intake port openings and extended intake flanges for improved flow, while retaining the stock location, making them compatible with Victor series manifolds and Ram Air IV style headers. Unported Cylinder Heads. Jan 1, 2024 · Pontiac Power RULES !!! www. Jan 23, 2016 · If I us the 6X heads , I'll have 8. Jul 27, 2019 · Russel Wells here a fe years ago used them on some heads that had not been ground enough for Pontiac high ratio rockers. A very special set of heads for sure - the Granddaddy of all the Pontiac race/hi performance heads. This is the area if you start chasing big power and open up the bowl it may cause the seat insert to fall out. this is also where the late Pete McCarthy dropped the ball, when he did the Pontiac Ultimate Cylinder Head articles on HPP decades ago. They have 96 CC chambers, 2. Torque - PUMP GAS AND HYD. 7K3's are good heads for a 455! Their backfall is the lack of bolt holes on the end ports1 Exactly the same as the popular 1971 96 castings I've used them plenty! if you don't need headers they are great heads! Nov 1, 2011 · Check out the Warp 6 canted-valve cylinder head from KRE. A skeptic is willing to believe, but is wise enough to entertain some doubts. All 421 Super Duty motors were discontinued by January of 1963 although some Catalina S. That's nearly a full point more and the cam for the higher compression engine needs to have close to 10 degrees more seat timing to maintain a safe margin for pump gas considering Sep 1, 2024 · E-Heads are on sale FYI Pontiac - Street. 11/1. Not knowing what cam is in the motor I would guess HP at 250 or perhaps a little more. Location: Sugar Grove IL USA. Pontiac V8 Cylinder Heads. The Ultimate Head article listed the flow charts for each factory head. You could also run a set of 303 RA V heads,56CCs. Just got rid of my 7M5's on my 455 and replaced w/6X. The Warp 6 Pontiac cylinder head! This is our third aluminum Pontiac cylinder head that we have brought to the marketplace. If you look closely you can see the typical screw head markings just on each side of the machined area. 77 valves. Hermans head only added side cant, and you really cannot get the valve head far off the bore like this. Having said that, A lot of folks would have just upgraded to D-Port Aluminum heads if available. So I have done a little research and the head stamped 17 are from a 350, and supposed to have 80 cc chambers on them . 65CCs. Folks would always have had d-port manifolds or headers. Either the ISKY or ARP 290-7201 studs can be used. Aug 6, 2019 · The Intake port on the HO heads flows 223 cfm to the 6X 209 cfm and with the proper 3 angle valve job while keeping the 30 degree seat the HO head can be made to flow 240 cfm plus. alarm went off but I started wondering what flow numbers are possible from a 670 head with professional CNC porting? Aug 25, 2023 · Today's Episode: The NEW King of the Streets, this 650HP Pontiac G8. Sep 22, 2008 · There are two versions of the 6X heads, 6X-4 and 6X-8 with the -4 being more desirable because of slightly smaller chambers. Has great potential, and I like the concept. 1967 was a transition year where both open and closed chamber heads were offered, as well as both 20 and 14 degree valve angle heads. It's not a SBC. PONTIAC SERIES II ALUMINUM HEADS. They are as follows; one cracked 670 head, 1 cracked 5C head, and EVERY 4X head I have seen[about 6] have been cracked in the center exhaust port. Blue noted, '69 production #722's didn't have a visible date code. " Pontiac 1 13/64 Brass Plug For Int Side of Head (0) Reviews: Write first review Description: Pontiac 1 13/64" Brass Plug For Int Side of Head, Each Apr 3, 2010 · The 1969 #46's have pressed in studs and are missing the outer bolt holes, but still make great heads opened up with the larger valves and heli-coiled for screw in studs. 050 smaller that the valve insert. 66" valves, these were the big-valve Pontiac performance street heads of their time (standard 389 heads up through '64 used 1. 5 hp vacuum cleaner motors), two graduated vertical manometers to measure atmospheric pressure, an incline manometer to measure actual airflow, and a velocity probe. They're borderline low for an 87cc head. Cylinder Heads / Top End Kits. 66 heads. Shop Cylinder Heads / Top End Kits Shop All » Top End Power Packages; CNC Ported Cylinder Heads ; Unported Cylinder Heads; Head Builder Series Kits ; Head Upgrade and CNC Porting Services; All Pontiac/Tiger Cylinder Heads Pontiac Cast Iron Cylinder Heads and Services; View All » EFI Systems & Components Every DCI Split-Port Ram Air V Head is MADE IN USA for quality and performance! Using highly efficient split ports and made to order combustion chamber shapes, DCI Ram Air V cylinder heads offer the most versatile high performance Pontiac heads on the market. You can see the unrestricted intake runners and splayed valve design. O. 77 exhaust valves. Jul 13, 2009 · 2001 Pontiac Trans Am WS6, 6-Speed, LS6 block, TEA LS6 heads, 4" SCAT forged crank, SCAT H-Beam rods, 226/234 cam, McLeod RST clutch, SLP Lid, SLP Power Flo Catback 1980 Pontiac Trans Am Y-84 Bandit WS6, 455 (. Apr 22, 2011 · The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Mar 27, 2021 · Now, your 140 casting heads are not original to your 65, the 140 casting came fitted on the early 1967 250 hp 326 cid motor and are stated to produce a 9. This will be the highest horsepower producing cylinder head in the Pontiac hobby. The intake bowl in this area is approximately . 022-inch thick. ARP Head Stud Kit Fits Tiger Head Only Price: $229. and now Edelbrock came out with a D Jun 22, 2022 · Pontiac Power RULES !!! www. Most all other d-port heads quit flowing in the 204-210 CFM range. Nov 19, 2024 · Pontiac Power RULES !!! www. Same 2. Over the years Pontiac v8 Cylinder heads came in many specifications. These conclusions are from bottom of page - shows 16, 48, and 12 all tied for best D-port. With flat top pistons and tight quench you are looking at 9. com Pontiac Ram 5 CAD: Pontiac Warp 6 Canted Valve: Ram 5 - Attention was made from Mastercam software to align the ports for clearance around head bolt tubes and pushords. Conceptually, I put it in the same group with the CV-1 head as far as being a different approach to a Pontiac head never used by the factory. 12 degree valve angle. engine w/ IAII Block and our CNC Race Ported Edelbrock Heads ( std. Nov 24, 2021 · Saw an ad on marketplace from a guy claiming 670 heads on his 1969 something-or-other Pontiac had been ported to "flow 300 cfm. 700. Victor Pro-Port Raw: These new heads are the ultimate choice for extreme Pontiac race applications. Ultimate Head Flow Charts by Pete McCarthy and High Performance Pontiac 1958 No. Wanted to add this just incase it would make a difference in your valve or cam selection or your instructions to a machinist (30 vs 45). Sep 24, 2016 · With new valves[not a Pontiac replacement valve], and a good valve job, they flowed 228 CFM, without any porting. " My B. 60" valves). Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass. 11 intakes. In our last issue, we began our foray into the world of airflow, as. 65 roller rocker and a cam with . After years of extensive R&D both on the flow bench and on our track, we have developed some of the best performing round port and D-port cast iron Pontiac cylinder heads ever. The 670s have fatter Intake flow numbers between . My question is, if I use the 6X 8 heads that are milled and confirmed to be 94cc and will be 8. My '71 #96 heads are like that,5. Best performance head 1970 Ram Air IV Nov 10, 2024 · 1972 Firebird 462, 6X heads, RA4 cam, iron intake, Cliff's Q-Jet 3925 race weight Best of 12. We also milled a pair of SD heads a bunch more than . This head was carried over for use on the '64 421HO as well. " Apr 4, 2006 · you could use a set of 63SD 980 heads. engine and used #48 heads as all 1969 350 H. In my 20 years of engine machining I have seen several cracked Pontiac heads. I need some help getting the bass down and some tabs would. Posts: 1,260 Dec 29, 2022 · 670 heads vs # 13's Pontiac - Street. 8 compression. 060" 455 even on the wide port version on the E-head due to bore shouding, plus just to fit in a 2. Jul 29, 2009 · Looking for a little education on the BBC "Big Chief" stuff. There are three programs available all based on the Edelbrock RPM head. Every DCI Split-Port Ram Air V Head is MADE IN USA for quality and performance! Using highly efficient split ports and made to order combustion chamber shapes, DCI Ram Air V cylinder heads offer the most versatile high performance Pontiac heads on the market. Factory engine restoration; Mildly modified for street; High performance for pro touring; Blower, turbocharged and supercharged; Stroker cranks and custom chamber heads Dec 11, 2020 · 1969 XU is a 350 H. I didn’t buy anything, the pricing for them is still per head, $2200 or $2600 for the set, just making sure those who are looking know. We did several sets (HO) for race engines (making over 600hp NA) and some nitrous motors. Are you looking for the Ultimate Pontiac cylinder head for your GTO or Firebird ?? Look no further than DCI Motorsports Inc. Jan 1, 2008 · The first Pontiac engine to receive the new "round-port" cylinder head was the R/A-II, which replaced the original R/A 400ci containing traditional D-port castings in May 1968. Apr 18, 2009 · All the '69 #48 heads had the large 2. Oct 23, 2019 · Skip Fix 1978 Trans Am original owner 10. Right where the center head bolt hole was drilled and surfaced. 20 valve! Jan 9, 2021 · BIG difference between 6X-4 heads at 92cc and 6X-8 heads at 101cc. If you look at my attached pic, this is where Pontiac placed the date codes. You can add the bigger 2. Start playing today! Jan 24, 2016 · Their is no need for anything larger than a 2. A great Canted Valve head for Pontiac flowing over 370 cfm right out of the box with over the counter components too. 77@136. The flow responded to all the tweaks we did and the final numbers were a pleasant surprise. Apr 3, 2017 · am fishing for some responses on possibly upgrading the heads on a recent rebuild. DCI has the expertise to build reliable, high horsepower, stroked, turbocharged and supercharged Pontiac Engines. Except for some special heads Jun 3, 2009 · With the earlier HP/big valve heads you start out with a longer valve,so there's less room with the commonly available valve lengths. a truly enlightening experience. 4. 's were built until April of 1963. Never had an issue with Pontiac 1. _____ Sep 23, 2020 · Hey everyone, I'm looking for some input from the other KRE D port Pontiac customers. Jan 16, 2021 · The 1970 #13 head uses the most current open chamber design that first appeared on the '67 #061 big Pontiac heads, it also has a 14 degree valve angle. Ultimate Pontiac Fiero V6 Engine Rebuild – Part 1 Welcome to the first part of my deep-dive series on rebuilding the iconic 1985 Pontiac Fiero GT’s V6 engine! This rare mid-engine beauty packs a 2. This will help dispell the "myth" that 48s, 12s, etc. They feature raised intake port openings and extended intake flanges for improved flow, while retaining the stock location, making them compatible with Victor series manifolds and Ram Air IV style headers. _____ Mar 20, 2014 · Dick I think I figured out what side tracked the original Ebay 221395478694. Both 72cc (400 manual trans and RAIII) and 66cc (350 HO) chamber versions were offered. Shop Unported Cylinder Heads Shop All » D-Port Cylinder Heads; Rd-Port Cylinder Heads ; Bare Castings Round and D-Port; View All » Head Builder Series Kits; Head Upgrade and CNC Porting Services; All Pontiac/Tiger Cylinder Heads Pontiac Cast Iron Cylinder Heads and Services Apr 22, 2020 · Wenzler Series 2 heads Pontiac - Race Ultimate Warrior : Join Date: Sep 2005 The PY Online Forums is the largest online gathering of Pontiac enthusiasts Mar 26, 2022 · I purchased #48 Heads back in 2010 from a member on this board back in 2010. Keeping the stock basic valve and exhaust port configuration would limit the valve rotation. Most Pontiac heads came in D-port. Except for some special heads Feb 23, 2023 · Those numbers are low for a 72 cc Edelbrock Pontiac head. My main concern is low to mid to torque. 5 or 1. 500” taller than stock) Ultimate From April and June 1991 High Performance Pontiac. 11 valves on a few 350's, don't mean that everybody should go with 2. 2. Heads and a 400 intake would be in the 8000-10000 range. I have a set of small chamber round port Eddies and I noticed the prescribed autolite 3923 plugs were recessed in the chamber my plan is to generously be`burr the unused threaded area in the chamber and cut the ground electrode ( side gap ) my plugs to give more direct exposure to the spark / flame kernel to hopefully provide some more efficiency May 23, 2012 · Strong street car for a pontiac 455. Years of product development, testing, research, dynoing, flow bench work, pattern changes, CAD research, hard work and money we have finished the head. The guy I bought it from said the heads on the engine were from a Pontiac 350. They would get you around 10. 5 cc,16s 74 cc,12s 67 cc,13s 77 cc,62s 75cc,64s 90 cc. 042 between Dec 28, 2023 · Pontiac Power RULES !!! www. Later model Chevy heads opened up the pushrod hole like the big valve Pontiac From stock Pontiac blocks to the newer IAII cast and aluminum blocks, Butler has the block that will be the foundation for your Pontiac performance engine Browse Engine Blocks Products Sort Best Match Lowest Price Highest Price Best Rating Most Reviews List A-Z List Z-A Newest Oldest Oct 31, 2012 · The valve inclination angle is relative to the bore. Nov 11, 2024 · 1972 Firebird 462, 6X heads, RA4 cam, iron intake, Cliff's Q-Jet 3925 race weight Best of 12. No question that this will be the highest horsepower producing See full list on dcimotorsports. _____ Feb 17, 2024 · Pontiac Head Cooling Trick - Part 2 - Keeping Your Heads Cool THE LOBBY Ultimate Warrior : Join Date: Nov 2000. cmjx ikg dmnlqmy mhss dnqxugq vcftl czwk ihhka myyl tufcmv