LA1/LG8 (3400/3100 00+) heads v. L82 (3100 94-99) heads...

[MantaGreen97]

I know there are differences in the UIM, LIM, TB, injectors and fuel pressure on these engines, but recently someone on another forum mentioned that the LA1/LG8 also has different heads (higher flowing) than the L82. I've always known/thought the L82 to have the same heads as the LA1/LG8 engines...

Am I mistaken or is he?

[bszopi]

The old style 3100 heads only have a 1.72" intake valve, whereas the 3400 and new style 3100 heads have the 1.76" intake valve.

[MantaGreen97]

The old style 3100 heads only have a 1.72" intake valve, whereas the 3400 and new style 3100 heads have the 1.76" intake valve.

Ahh I see. Alright guess I was wrong, lol. Thanks bszopi! Can always count on you, even since back in the GMPower days!!

[SappySE107]

I have posted flow sheets for different heads so you can see the difference.

3100 Heads (93-99)
http://60degreev6.com/showthread.php?t=24981

3400 Heads (170 casting)
http://60degreev6.com/showthread.php?t=24980