Soooo....does that mean the V-6 wheel will NOT work? Or are they different in say, tooth count? My V-6 wheel is 153 teeth, which I need. Maybe the 350 is larger diameter? I guess I could count the teeth on the 350's flexplate. I'm fairly certain it is a bigger diameter....need to look again.
History of the Buick V6. The Buick V6 start as an economy design to fit in the tiny engine bays of GM compact cars of the early 60's. It was basically a 3/4 215 Aluminum V8 in archetecture but desplacing 198cid. In 1964 after the sale of the Aluminum V8 to Rover and the retooling for the 300cid iron V8 the V6 grew to share tooling and design fetures and became the 225 V6 which lasted till 67 when the V6 was sold to Kaiser-Jeep and Chevy 250 inline sixes were used. Jeep used the engine unchanged as the Dauntless 225 in its smaller vehicles. During the gas crunch of the 70's GM bought the V6 design back from Jeep and redesigned it around the new Buick small block the 350 resulting in the 231 oddfire in 76. In 78 the engine was redesigned around a new split pin crank to make it an even fire motor. In 79 improved heads arrived with taller intake ports and a big bore version the 4.1L 252 arrived. The engine was basically unchanged except for minor block improvements untill 85 when 20 bolt oilpans showed up to replace the 14 bolt pans and in 86 the ultimate "RWD" products block arrived. In 88 the engine was redesigned with a lower deck height, shorter rods, and an on-center block but the same bore and stroke to form the 3800 Series I engine then in late 95 the 3800 series II arrived with cross bolted mains, powered metal rods, beehive valve springs, composite intake, gerotor oilpump, and improved heads. 3800 Series III motors arrived in 2004 with cold forged powdered metal rods, hypereutectic pistons, and an improved Eaton M90 supercharger. I'd worry about the difference in balance factors between the V6's and 350's. TA likely is listing a neutral balance flywheel for both which negate the balance factor of the stock flywheel. My production V6 flexplate is externally balanced but my race flex plate is neutral balanced for my internally balance crank.
V6 - V8 difference Remember one is a V6 and the other is a V8. Some differences listed, remember the 225V6 was from the 300V8 engine minus 2, the 231 is a larger bore .030, even-fire(off-sets listed). The stroke, deck height, rods(off-set journals), pistons(same as rods), belts (longer). Read the catalogs from after market suppliers. Diver
I've got 3.8 V6 30thou over pistons in my 73 350cu not sure if compression dropped much but it goes well on the overpriced crap low octane fuel in Australia and a timming cover that was marked V6 Buick on the box. [/IMG]
Do you know how much the block deck was decked if at all? Any idea how far from the deck the piston sits, and finally do you have a part # for the pistons?
The block was decked as was the heads shaved. The pistons sit near level with the deck but as the rebuild was done over 5 years ago I cannot find the receipt on the amount that had been taken off or the cam and piston no's. I'am not sure if the engine rebuilder sourced some US V6 pistons or used the Aussie/ Buick V6 Pistons in the rebuild. But it does the job and can light the 15X10 wheel tyre combo if floored with the 2.73 diff ratio. I hardly ever drive the car only on fine days and club runs. Trying to source the V8 Buick pistons proved to be a headache in Australia so I let the rebuilder do it.
looks as if you have the 24 cc dished pistons with enough taken off the deck to get about 9.5:1. Interesting.
old thread ...i know but what the reason no one tried or mentioned v6 evenfire rods in a v8 may or maynot work?
The even fire V6 has a different size rod journal size, 2.25" the 225/231 odd fire V6 and 300/340/350 is 2". I have read that the 231 odd fire has a stronger rod than the earlier 225 which I belive was also used in the 300 and was said that the later odd fire will back fit to the 225 so you would think that would be an upgrade rod for the 300 also. Greg
231 odd fire rods (1975-mid 77) have the same design as the later Buick 350 rods. Held together with cap screws. They are identical center to center and have the same crankpin diameter as the Buick 300 rod so would make a good replacement for that one. Too short for the 350. http://www.roversd1.nl/sd1web/tuning/v8motoren/016.jpg Greg
