breaking up

[gnxis]

new motor,girdled,30 over speedpros,gn1s,bgc intake,70mm tb
te66,55#ers,3'"maf blowthrough,atr headers,th 3 1/2 dp.
idles good revs good.breaks up at about 4500 rpm.
i have notbeen able to get it on the road yet.
any boby have this happen on a new motor.
coil pack worked good before headgasket prob.
bad grounds?

 

[Mightysix]

Re-check spark plug gaps, fuel, and coil pack...

Good luck, Mike''
PS. BGC Intake, Whats the BGC stand for? I'm dumb....

 

[NCC1701]

BGC

I believe it stands for
Bowling Green Customs

 

[Mightysix]

Thank you..... Do you know if they make down pipes?

Mike

 

[Raymond Bunch]

gnxis

I had a similar problem a while back, and after process of elimination, it turned out to be a fuel problem. I was running waaaaay to rich.

So in saying this, after checking your spark plug gap, grounds, and what have you......

Turn your boost down to around stock to be safe, start taking a little fuel out at a time and see if you notice any diffrence after 4500 RPM, mine cleared up after adjusting the fuel pressure. Just a suggestion, and hope you find the problem soon....

Ray

 

[gnxis]

thanks guys for all the help, fuel pressure is set at 42 line off.
i'm thinking prob plugs cause i had a hard time getting valves adjusted properly so plugs are prob fouled i'll check tomorrow.
i.ve also got a couple of braided ground straps i'll do tomorrow.


keep the sugestions coming.




thanks Doug,