After doing a leak down test and it was a little high I pulled the head off of the car to get a valve job done. None of the valves seemed all that bad for the performance that I was losing so I started looking at everything else. I found a couple of exhaust leaks but nothing major there either. So I decided to pressurize the intake tract including all the hoses and intercooler pipes. That's when I found there was a real problem.

After seeing this I couldn't believe it actually ran a 12.5@116.

 

wholie chit.I havent seen anything like that before. How much were U boostin to break the welds on the intank ? Well its good u found the problem.

 

wow jimbo nice intercooler! Whitey should be able to hook that up in about 10 minutes. I'm glad you found the problem cause we were all scratching our head on the dyno that day. at least it was'nt the motor like we thought.

later Justin

 

Looks like it might have began as a stress crack and then the boost opened it up. I wish my problems were that simple.

 

Eck. There is a crapload of porosity and contaminants in that weld. Welds, for the most part, are supposed to be stronger than the base metal.

 

happens on semi's all the time

 

i broke the welds on my intake manifold like that before

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MikeySpec &raquo;</TD></TR><TR><TD CLASS="quote">i broke the welds on my intake manifold like that before</TD></TR></TABLE>

Fast and the furious style?

 

is that a home-made IC?

 

Who made that interoocler?

 

Running 28 psi.

We made the intercooler.

The welding was from when he first started playing with aluminum.

 

damn that sucks. the one guy in your crew was telling me he thought valves were burnt up. thats crazy. good luck to getting it fixed quick , i wanna run you guys at Atco

 

How are you going to race if you sell the car on ebay?

 

Same thing has happened to me before. No big deal. I'd still hit up the valves and ports while you got the head off. Never hurts to go faster.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B20T CRX &raquo;</TD></TR><TR><TD CLASS="quote">How are you going to race if you sell the car on ebay? </TD></TR></TABLE>


i doubt it will sell . too many kids with big dreams and no money.

 

I wondered why you weren't hitting times like you usually do at St. Louis. That would do it