Running a test pipe?

[SUPRASTEVE]

SO I AM RUNNING MY TEST PIPE AND I CAN BARELY FEEL A DIFFERENCE
Is it good to run a DP and TP and CATBACK EXHUAST on the Supra's?
Also does the supra need any back pressure at all I don't get the whole back pressure thing can someone explain?

 

[SevenMKIII]

Do you have a ported or aftermarket elbow? Or does your downpipe have an elbow integrated into it?

Yes, modifying the exhaust helps out a ton on Supras. You want to have as little back pressure as possible on a turbo application (i.e. Supra turbo). Restrictive [stock] exhaust creates pressure that works against the turbo, making it, in general, spool slower. Installing a free-flowing exhaust decreases the back-pressure allowing the turbo to spool quicker and in most cases raise boost by one or two psi.

But if you have the stock elbow on there, your mods won't do much at all because the restrictive elbow is bottlenecking the entire system.

Hope that helps, if not, ask more specific questions I guess haha.

 

[SUPRASTEVE]

Do you have a ported or aftermarket elbow? Or does your downpipe have an elbow integrated into it?

Yes, modifying the exhaust helps out a ton on Supras. You want to have as little back pressure as possible on a turbo application (i.e. Supra turbo). Restrictive [stock] exhaust creates pressure that works against the turbo, making it, in general, spool slower. Installing a free-flowing exhaust decreases the back-pressure allowing the turbo to spool quicker and in most cases raise boost by one or two psi.

But if you have the stock elbow on there, your mods won't do much at all because the restrictive elbow is bottlenecking the entire system.

Hope that helps, if not, ask more specific questions I guess haha.

Yeah I kinda just had a brain fart, hunger gets the best of us I suppose.
well as far as I know the whole car is stock so I'm guess that elbow is stock and probably is the whole problem besides the very restrictive DP. Wow so know I learned that TUrbo cars should as lil back pressure as possible WOHOO! I think SupraSport sells a turbo elbow so that should help a bit and then all I have to worry about is getting a DP. =D

 

[radiod]

All I can really do is echo what Seven has already said. Even if pretty much everything else is stock, running a free flowing low restriction exhaust system should lower your turbo lag, and bring your boost to 8 or 9psi easy. A stock supra exhaust has 2 CATs as well...getting rid of the one in mid exhaust is just half the job. There's one in the downpipe as well.

 

[87mgte]

I think SupraSport sells a turbo elbow so that should help a bit and then all I have to worry about is getting a DP. =D

i don't know how cheap their elbows are, but usually you end up spending more on an elbow/downpipe combination than you do on a divorced downpipe with the elbow already integrated into the downpipe as one piece. i'd go for a DDP if i were you.

 

[SUPRASTEVE]

All I can really do is echo what Seven has already said. Even if pretty much everything else is stock, running a free flowing low restriction exhaust system should lower your turbo lag, and bring your boost to 8 or 9psi easy. A stock supra exhaust has 2 CATs as well...getting rid of the one in mid exhaust is just half the job. There's one in the downpipe as well.

Thanks and yea i know about the crappy crap DP. =D
I chopped it all off im basiccaly running 3in pipe from the dp back but I have to get a HKS DP and probably a differnt TURBO ELBOW then I should be good for a while
Yup I gotta 89 TURBO like yours, 5spd targa with the tems and the abs =D

 

[SUPRASTEVE]

i don't know how cheap their elbows are, but usually you end up spending more on an elbow/downpipe combination than you do on a divorced downpipe with the elbow already integrated into the downpipe as one piece. i'd go for a DDP if i were you.

Do those come with the O2 sensor slot?

 

[radiod]

Depends on what you get and where, hehe. Since it's all in pieces, you should join in on the wideband O2 sensor group by they've got going on

 

[SUPRASTEVE]

Hmm looks like I'll have to search the web again =O

 

[87mgte]

Do those come with the O2 sensor slot?

the BIC ones do, but i'm not sure about the ebay DDP's.