I know this is Honda tech but i have a problem with my 91 mr2 turbo and was hoping some of you guys could help.

I have a Blitz nurspec exhaust, custom downpipe, and blitx intake. I also have a greddy profec a installed.

My problem is boost creeping, my car should be able to run 15 psi from the stock 11psi easily. But i experience boost creep as the rpm's increase. My question is what steps can i take to solve the problem of the creeping?

I will drive my car with ebc on or off, and the boost will go from 10 psi(which should be the max), approx 3700rpm, then slowly creep up to 15psi+, 4000rpm+ and by then my fuel cut will kick in.

 

what size of downpipe

 

bump

 

The problem is that the custom downpipe creates too low of a pressure after the turbine, so not enough gasses are flowing through the internal wastegate housing.

You have a few options, though.

Take the turbine housing off the vehicle, and port it with a dremel/grinder.

Insert a restrictor plate at one of the flange points of the exhaust system to increase backpressure, and cause more gasses to pass through the wastegate opening.

Weld, or seal off the internal gate on the turbocharger, and install a custom External Wastegate setup.

Remove the stock turbocharger, and replace it with an aftermarket unit with a ported wastegate....

good luck... Boost creep can be a pain.

 

took out the ebc, and put in mbc.. and it's all good