mk3 supra blow off valve
 

how would i install a blow off valve on a 1990 toyota supra turbo. its got a 7mgte motor. please help i searched everywhere if anyone can give me a detailed instruction.

Who is the BOV manufacturer?
Do you have the stock plastic IC tubing or some aftermarket kit?

stock 7mgte models use a kvam. with RBV. youd need to tune your decel air or go MAFT if you didn't feel like stalling every time you shifted.
hell i dont even know if tuning your decal air would work.. any thoughts on that?

I'm pretty sure the SAFC II has tip-in and tip-out adjustments. I know the MAFT Gen II and MAFT Pro do.

2fast4u :p, are you looking to install a BOV/BPV which vents to atmosphere or replace the stock unit? Venting to atmosphere will most likely result in driveability issues unless you add some electronics to tune for the discrepancy when the BOV discharges. Replacing the OEM unit should be obvious unless you're looking to use a different make/model.

Most aftermarket models will require a bung to be welded onto the intake piping somewhere between the intercooler and throttle body. The BOV/BPV often comes with the bung supplied. Get it welded in somewhere and pay attention when deciding on the location that you don't put it somewhere that's going to be problematic once the BOV/BPV is attached. Then, connect the vacuum signal hose which ran to the stock BPV to the new unit and if needed tune the new unit accordingly.