Turbo Boost PSI
#5
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Join Date: Apr 2006
Location: granite falls washington
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16mm is not much if any improvement on a 93 which has a 18.5 housing.
16mm on a 92 which is a 22mm housing will be a improvement
4 inch full exhaust is also not much if not a loss with the 16 18.5 or 22mm housings.
The exhaust flows out of the housing to fast ( no pressure ) to keep the compressor side spinning = lag.
Leave the 3" down pipe then open it to 4'' if needed.
16mm on a 92 which is a 22mm housing will be a improvement
4 inch full exhaust is also not much if not a loss with the 16 18.5 or 22mm housings.
The exhaust flows out of the housing to fast ( no pressure ) to keep the compressor side spinning = lag.
Leave the 3" down pipe then open it to 4'' if needed.
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