Overboosting

Tony Dipatri

Tony Dipatri

New member
I almost hit 20 LBS. of boost today with a 7 LB spring in my wastegate. I need some possible causes for overboosting? Drivetrain has less than 2 K on everything.

I installed silicon Vac kit and a 7 LB spring in the wastegate and still hitting 20 LBS

Thanks
 
black cat

black cat

New member
Re: Overboosting

i just went thru this last week with my new setup. put a holset with an internal gate and a 3" exhaust. even with the gate disconnected still went over 15 lbs at 2700 rpm. took the turbo off and ported the waste gate hole and how it bled into the exhaust. put it back on and with some tension on the gate sits at 7 lbs till redline. not sure if this is your problem but hope it helps
 
dgoodhue

dgoodhue

BuSTeD 4.3
Re: Overboosting

I had to port my pte6131 wastegate hole as well to get my boost down. I have a 12psi actuator and was hitting 18psi at half throttle. I thinks it's 1.06 from pte and I opened it upto 1.21. My truck now does 13psi.
 
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