I have an 88 turbo with just a few basic mods including a large intercooler with 2.5 piping and 3 inch exhaust. Nothing else majorly different. But at WOT It builds 10psi then as rpms increase the boost decreases until it settles at ~7psi. Could it be possible that I've already maxed the turbo out? I wouldn't think so but nothing else makes sense. There are no leaks and the car runs great. What do our ct26 turbo max at?
I can't be maxing out the turbo aready, can I?
- Thread starter IRONMAN
- Start date
You can buy a cheap manual boost controller off ebay or make your own. I'm sure you can afford $20 dollars. If it does not hold boost with the boost controller then you may have a bad wastegate. If that is not the issue then you need to do a boost leak test.
Okay, the turbine on these turbos can't keep constant pressure above 5k rpms. The CFM the engine is consuming is greater than the turbine is able to keep up with thus causing pressure to fall off.
If you're not running any kind of boost controller at all, 10 PSI with full exhaust and IC piping is average. With an EBC, the pressure will come on a tad faster due to the solenoid helping keep the waste gate from creeping off the spring.
If you're not running any kind of boost controller at all, 10 PSI with full exhaust and IC piping is average. With an EBC, the pressure will come on a tad faster due to the solenoid helping keep the waste gate from creeping off the spring.
when i was on the stock ct26 i shimmed the wastegate with about 4 washers on each bolt and had a mbc. it would help it from dropping pressure, but it never made it stop.
