According to Mark Warner's Street Turbocharging book, introducing a large FMIC on SOME cars can introduce a boost loss of approx 2psi usually only 1psi, but this is only due to a restrictive exhaust system like a factory exhaust, not allowing the turbo to expel the gasses quick enough so as to charge the FMIC properly. Also this will introduce and noticeable amount of lag in the turbos spool time.
This is a across the board statement about alot of different cars not specific to S15s.
Im assuming that if you car can spike to .9bar you have a turbo back 2.5 or 3" exhaust system?
I had a similar problem with my car, so i replaced most of the vacuum hosing with silicone hose (4mmID) and brought better clamps for all the silicone joiners on the intercooler pipes, also checked the BOV seals and put better clamps on the factory re-circ pipes after cheaking every pipe for a leak.
not sure exactly where the leak was but it defiantly fix the problem
This is a across the board statement about alot of different cars not specific to S15s.
Im assuming that if you car can spike to .9bar you have a turbo back 2.5 or 3" exhaust system?
I had a similar problem with my car, so i replaced most of the vacuum hosing with silicone hose (4mmID) and brought better clamps for all the silicone joiners on the intercooler pipes, also checked the BOV seals and put better clamps on the factory re-circ pipes after cheaking every pipe for a leak.
not sure exactly where the leak was but it defiantly fix the problem
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