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#1
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aftermarket block availability
pleasantly surprised to find All Pontiac having a run of blocks close to shipping. there is at least 9 more iron blocks and some aluminum blocks available as of this afternoon. If anyone is interested.
I fully expected these to be a covid, supply chain, no machine shop help, victim I hope all vendors are able to fill our desires
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1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
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#2
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Good news for a bunch of All Pontiac Block Buyers.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#3
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allpontiac has some of the best customer service i have ever seen. great guys, we are lucky to have them in our hobby.
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#4
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Totally agree
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#5
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I agree too...Frank was awesome to deal with.
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#6
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Quote:
AllPontiac IA2 APSJB09040028 I’ll add that Bob was great when I ordered my first IA2 block and scat forged crank back in 2007. He promptly answered every time I called.
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James 1970 Trans Am Spotts Built 484" IA2, Highports, EFI Northwind Terminator X sequential EFI fabrication and suspension by https://www.funkhouserracecars.com/ Last edited by R 70 Judge; 05-15-2022 at 08:51 PM. |
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#7
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How much is a iron block ?
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#8
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#9
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I agree on Frank's customer service being the best in the business. Goes out of his way to do what is right and is always a pleasure to work with.
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Jim 71 Firebird, best 1/8th mile time of 5.02 at 142 at altitude in Vegas |
#10
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Quote:
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1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
#11
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i wish there were larger bore options, along the lines of the aftermarket BBC's 4.5-4.625
is that even an option/possible in a traditional pontiac block style? (not a reference to a stock block, but overall stock block size if you get what i mean) |
#12
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Bore spacing between centers of each cylinder is only 4.625" so those bores are not possible with the Pontiac V8.
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#13
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Quote:
Some in the Pontiac World feel the Pontiac 4.62 bore spacing make it the only unique thing about the Pontiac Engines. Everything else changed over the years. Heads, Cam designs, Rocker Arm ratios, Distributor signaling, HEI vs points, Intakes, carb sizes, ................................................ Also for years, some advocated going to a bit larger bore spacing block design. The "PURISTS" said then it will not be a Pontiac Engine any more. Arnie B. ran a "Pontiac sold" Chevy engine with a cast in Arrowhead (Pontiac) on the block for many years in his race car. So the Purists say "Don't change the Bore Spacing" (Some have done it creatively and got a slightly larger bore engine.) Mostly in a "STOCK" NHRA class. 99% of the very fast racers, OUTLAW PRO MOD for example have been running Cubic Money aftermarket blocks for years. Now Billet Blocks are available. Not a single GM designed part on the engines. But they can run 275+ mph in the quarter too with a door car. So people have slightly stretched aftermarket Pontiac blocks to run in given classes for at least 20+ years. But you are not going to get a 750 cid engine out of a Pontiac design. So you want the larger bore spacing engine so it can pass for a traditional block? Just my opinion. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#14
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thanks Tom
i was just wondering if a bigger bore aftermarket would be possible, which it seems it can't, well... lets just say within a reasonable amount of $ |
#15
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There was some talk a few years back about making a run a IA blocks with the outside bores moved out more but all sorts of issues come up. You can only move things so much before things do not line up with crank,rods, pistons, lifter bores and the chambers.
It would be a whole new engine designed made to "look" like a Pontiac. Also talk of making a Pontiac engine based on a BBC crank. Then what do you have ? None of this is ever going to happen. Not enough of us left and our group is shrinking everyday. That said, Frank is great to deal with. Man of his word. Answers his phone, helps you out with honesty. A fine asset to the Pontiac community. |
#16
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IMO, the most cost effective way to get the larger bore spacing would be to have a billet block made. Then you could incorporate all the individual desired changes you want with very minimal additional cost. No real additional pattern or core changes and so forth. Just design charges and a tool path code. Then the hand full of people who care can stand around and drink beer and bless it as a "Pontiac", or condemn it as the work of the devil. Eric and I drew our line in the sand on the stock bore spacing, a cast block that would except ALL stock block components and we went racing with it. Many would say we have always been cheaters with Nitrous Oxide, Nirto Methane and a Roots Blower. I can live with that.
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#17
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We had a IA 2 Iron block made with a .040 additional bore spacing for a project for Frank G.It found its way to a AP customer and was finished as a very big power NA engine.
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Checkered Flag Machine & Ceralli Competition Engines Racing engines and induction development http://www.checkeredflagmachine.net/ |
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#18
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Interesting! Was it a one off casting? Or was the additional bore spacing from machining only?
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62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs |
#19
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Just moved in the machining program.It can be done again..
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Checkered Flag Machine & Ceralli Competition Engines Racing engines and induction development http://www.checkeredflagmachine.net/ |
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#20
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Did the change result in a larger bore than 4.375? Or was it done to unshroud the valves?
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62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs |
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