[CaliforniaKid]

Originally Posted by Blast2hell

The front main seal on an LT4 has a high rate of blow by failure whenever you add any boost to it. When it does blow, some guys put the LS3 front main seal in instead as it's bit better at sealing. I personally blew mine out on the wall at daytona with full exahust and slightly smaller upper pulley. Granted the wall amplified the effects.

A catch can system can prevent this. I didn't have one at the time. Lot of well written articles on this from smarter people than me.

If you do put a catch can, make sure you stay on top of emptying it, as you'll be surprised how much ends up in there at an HPDE day.

Good to know, any kit that seems to fit best?