C6vettegfw

Hey guys just wondering if anyone here has done a ls2 421 stroker with a ysi or ecs 2200r. If so how did you like it, what was your hp and tq numbers. Cheers!!!

Quickvertc5

Im just finishing up My new ls 417 YSI combo
should be close to 1000 rwhp on 93 and meth


421 should be similar

LedfootLarry

How do you get 421 ? If you go to a 4" stroke on an Ls2 , it becomes a 402. Are you thinking of sleeving an LS2?
Anymore than a 4" stroke is not recommended with FI on this block.
But you should make up to 900+ on a stock stroke

C6vettegfw

As leadfootlarry stated. How did you get your 417. I'm just looking at different options. I was going to go with the 402 but my tuner said we can do the 421 for the same price. But if it's not recommended I'll just stick with the 402. Thanks for the help guys.

schpenxel

4" stroke = pistons coming out the bottom of the cylinders at the bottom of the stroke. It's pretty hard on things.. plenty have done it, but it's not ideal

C6vettegfw

So stick with the 402 then ok sounds good!!!!