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you should probably hold the tune off until its not spiking any more, they do run the tune pretty rich when it first comes on boost so you could probably get it tuned if you really wanted to, can you not just invest in a good boost controller? if its not your dump pipe/waste gate then it will be your manual boost controller, mine always spiked until i got my blitz sbc

its a 3inch dont know what brand, yeah that what i thought about the tune. 1 of mates has to rebuild his gearbox he is doing that next week, i mite c if i can borrow his electronic boost controller to c if that fixes it. thanks

its a 3inch dont know what brand, yeah that what i thought about the tune. 1 of mates has to rebuild his gearbox he is doing that next week, i mite c if i can borrow his electronic boost controller to c if that fixes it. thanks

WEll I put a hi-flo cat back in mine and the boost problem is still there so Im tipping that its the front pipe . I think I will bite the bullet and buy a bell mouth one instead of the split pipe. It started happening after I installed the split dump...

rob

WEll I put a hi-flo cat back in mine and the boost problem is still there so Im tipping that its the front pipe . I think I will bite the bullet and buy a bell mouth one instead of the split pipe. It started happening after I installed the split dump...

rob

yep i had a split dump/ front and changed back to bell mouth and it solved my problem ;)

yep i had a split dump/ front and changed back to bell mouth and it solved my problem :(

it wasnt my dump pipe its my frount mount i took it and tried the standard 1 now it holds 10 pound nice but why is it my frount mount causing the problem.

  • 4 weeks later...
Thats weird! i have a similar issue. Maybe the FMIC has a leak or something??? What brand is your FMIC?

Mine is HDI.

yaeh i took mine of and got it pressure tested its all ok. so i brought e boost now just sorting the settings out highest its boosting to at the moment is 11.5psi, mine was a cooling pro just jap an elcheapo, so i would suggest getting an electronic boost controller if you havnt got 1 already.

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