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4.3L Vortec history
Posted: Tue Dec 12, 2006 7:55 pm
by BobbleSmitty
Just a quick question...
I thought I remember reading somewhere that our engine is just a shortened 350? If so, is it a shortened LS1, LT1, etc... ??
Posted: Wed Dec 13, 2006 8:00 am
by 2kwik4u
It's a semi-shortened small block chevy......The old style 350 that has been around since the dawn of time.
LT1 was upgraded heads and cams I believe
LS1 was a COMPLETE redesign on the small block, and has ZERO interchangeable parts with the old style.
Posted: Wed Dec 13, 2006 12:31 pm
by Griff
I think the best comparison would be the L31 since it's the 5.7L Vortec engine so would be the same beast.
Posted: Thu Dec 14, 2006 6:11 pm
by rick
The 4.3 engine use's a 90 degree block. Its the center line between the middle of the pistons to the middle of the crank. Just like the 350 or small block v8. The 90 degree set up has alot of vibrations thats why GM installed a balance shaft. I think a other v6 motors were set up at 60 degrees.