need some help

[89 supra]

i have a 89 supra turbo(7m) n i plan to get
-bic divorced downpipe
-catback exahust idk which 1
-apexi intake
-test pipe

i was wondering if i should do sumtin diff or just keep it as planned



also i was driving my car today n i got it to 118mph is that normal?????

[Bill UK]

As you are probably aware any modifications to increase power could result in a premature head gasket failure or worst depending on the condition of your engine. The most common exhaust modification is a front down pipe, which will take out the first cat. Another small length of exhaust pipe will replace the second cat, (often called a test pipe) some manufactures supply this as one complete unit. If you also shim the turbo waste gate with 3 or 4 washers you should be looking at boosting around 14 psi. (Which is fuel cutout) Depending on your location in the US your State may have lower levels of exhaust emissions allowable than the UK, which would restrict the removal of the catalytic converters. When you say 118 mph is this in second gear or with the handbrake on in fifth. Top speed should be around 144 mph or more Link

[89 supra]

Originally Posted by Bill UK

When you say 118 mph is this in second gear or with the handbrake on in fifth. Top speed should be around 144 mph or more

no that was all out
thats all it could give me

[Bill UK]

Something defiantly wrong there, 118 mph your revs should be about 3.5 K from memory. Just over 3K revs would give you about 100mph. (Auto box with overdrive) What revs are you doing @ 118 mph. ?

[89 supra]

pretty high like around 5k-6k (dont remember exactly)

i kno i got a vacuum leak cuz when i start my car cold it shuts off i have to give it some gas so it stays runnning( or it it a vacuum leak)

i get around 4lbs of boost

[86.5 7MGE]

I was reading on this other site http://www.supras.com/06/techcenter/display.php?QID=23 this may help your problem just a thought...u might have a problem with the cold start injector...here is how u can by pass it

[89 supra]

Originally Posted by Bill UK

Depending on your location in the US your State may have lower levels of exhaust emissions allowable than the UK, which would restrict the removal of the catalytic converters.

i dont plan to follow Californias rules hehe im just gona cheat the system(smog)