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May 11, 2024 · The presenter of the full video states that Pontiac was positioned as GM's performance division, January 2024, the Camaro is done, Mopar is not making an ICE super car and there is a void in this segment leaving Mustang with a corner on the market.
Aug 19, 2022 · For example, the engine in my '69 carries a date code of K278. K=November, 27, 8 meaning 1968. This brings us to another fact you must consider when interpreting date codes. The Pontiac engine foundry would begin casting parts for the following model year at "about" mid-year.
Jul 21, 2010 · Your 670 heads started life at 76cc's. The 72cc's was the advertised size, but like most Pontiac heads they were larger. You will be at about 72cc's if a normal cleanup cut was performed when a valve job was done. You could also be at around 68cc's if more cleanup cuts have been done or a shop got carried away on the milling.
Aug 24, 2017 · Basically, all Pontiac D-port heads with the 2.11" intakes/1.77 exhaust flow pretty close the same. Funny how the Ram Air V gets the worst exhaust-to-intake port when it was capable of propelling a '69 GTO down the quarter mile at 11.73. Ya, I'd take that poor port any time. So read the numbers with a grain of salt as he says.
Aug 28, 2018 · Pontiac only used 1 block size having different bores, strokes, and main bearing sizes - no big block or small block like other brands. The block/head bolt pattern is the same from 1955-1981, so you could bolt any year head on any year engine, but it does not mean that they will work on any year engine.
Apr 19, 2018 · The firing order on all Pontiac motors is 1-8-4-3-6-5-7-2. The best place to start the adjustment process is to begin with the #1 cylinder. Whether you are building a new motor, swapping in a cam, or adding other upper valve train components, start with the #1 cylinder.
Oct 26, 2024 · Pontiac Forums is the premier online community for owners and enthusiasts of Pontiac automobiles. We cover all Pontiac makes and models through every generation.
Nov 10, 2011 · Pontiac blocks, being the same dimensionally, have the same overall length, width, crank length, and bore spacing so in terms of bore and stroke they all have the same limits. The significant difference internally between the 400 and the 455, as you probably know, is the diameter of the main bearing journal on the crank - the 400 being 3.000" and the 455 being 3.250".
Apr 20, 2018 · Agree with Shake-N-Bake. The Pontiac Historical Society documents for your car should have the build info and the EUN you see above the block code of YS - 513768. The block date you provided shows the block cast as April 11, 1967. The "670" heads are correct for your engine block code, YS.
May 29, 2023 · Pontiac used the same flat top piston in all their engines and used the combustion chamber size to change compression ratio's. Assuming you do have the correct "48" heads for your engine, there appears to be 2 different chamber volumes - 1 for the 350HO and the other for the RAIII.
