Bone stock you'll see about 6 PSI of boost. To get more than that, you can upgrade your exhaust, install a boost controller, upgrade the turbo, shim the wastegate (I personally don't recommend this method).... Basically, there are several different methods to increase boost pressure. I believe the easiest way to gain more boost would be to buy or construct a manual boost controller. This method also allows you to adjust the amount of extra boost, depending on your needs.
With all that said, I wouldn't recommend running much extra boost on a tired 24 year old engine; extra boost equals higher combustion chamber pressure and stress, which typically exposes hidden problems (such as a weak head gasket). Make sure your engine is healthy and in good running condition before trying to force more power from it.
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1989 7MGTE R154 Targa Top White Package w/Blue Interior
Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels
Last edited by btwilson86; 04-26-2012 at 04:55 AM.
Reason: Stupid Typo's
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