What's all this talk about STIs prone to getting melted pistons ?

Recently bought V4 & want to know how to prevent it, if it is a problem.

cheers all

Richard

 

Dont use NUL without some octane boosting addative. Millers gets a good review on the bbs. Although a bit controversial add some Broquets.

 

Check out

 

We recently had the problem of a melted Piston.. We would like to find out what caused it.. See the following pics from my webpage and let me know what you think.

 

Jamie,

Under what circumstances did it let go, and what mod's have been done.

It's hard to tell from the pic's how much of the damage could be due to det', and how much is due to bits of piston bouncing between the crown, and heads. It does look as if it took a little time before you realised what was happening.

It's pretty rare for the pistons to go, it's mainly either no.3, or 4 big ends.

IMO it looks like it could be fuel starvation, which also seems to hit no's 1, and 2 first.

Mark.

 

Jamie,
jesus!!!

I ve seen some damaged pistons in my time
(motocross Racer) but that is just mangled!!!!!!!!

 

Don't use NUL fullstop in an STi. Not even with Octane Booster.

 

Tarifa, have a look at the thread 'Speedo Conv. causing ECU probs'