I have a ls with an fmax kit on it, the car ran for about 30 minutes after the install until huge amounts of white smoke poured out everywhere. Changing the headgasket didn't do anything. Got the head inspected that was fine. Turns out I had 4 cracked pistons. I was reading about 7.5 psi on my boost gauge when we ran it (9psi spring). My best guess is to do that kind of damage the kit must have spiked cause all you guys seem to run 9-11psi on stock b18b blocks. I can't figure it out. Don't want to make the same mistake twice after the rebuild.

 

What kind of fuel upgrades do you have? If you rebuild it to handle lots of boost you wont have that problem!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RedTegLS &raquo;</TD></TR><TR><TD CLASS="quote">What kind of fuel upgrades do you have? If you rebuild it to handle lots of boost you wont have that problem! </TD></TR></TABLE>

Sounds like you didnt even run an FMU

 

That happened on my friend's LS as well.. but he hooked up the wrong vac. line to the wastegate...open wastegate...woot woot...that might have been your problem

 

I was using a MRL2 additional injector controller, the setup uses 2 440cc injectors in the intake piping. Wrong vac line to the wastegate...hmm maybe.