What size pipe on 90 turbo mini

[86GLHT]

What was the factory size pipe on these things? I forget! My new purchase has just the cat hanging under it, which I think is plugged. I want to cut the cat off and just weld up a tempory exaust/muffler till I can order up my 3" in a few months.

[turbovanman]

Hey, in front of cat its 2.5 inches, at rear of cat its 2 1/4 inches.

[JandHbodies]

Quote:

Originally posted by turbovanman Hey, in front of cat its 2.5 inches, at rear of cat its 2 1/4 inches.

Must be an emissions thing, but that downsizing never has made any sense to me.

[Subliminal]

Well supposedly the smaller pipe, the further you go back, keeps the speed of the exhaust up.

I don't know that it's worth all the backpressure...but that's what I've heard.

[turbovanman]

Quote:

Originally posted by Subliminal Well supposedly the smaller pipe, the further you go back, keeps the speed of the exhaust up. I don't know that it's worth all the backpressure...but that's what I've heard.

Gee, where did you get that quote from, lol!!!!

isnt it best to have no backpressure with turbo cars?

[turbovanman]

Quote:

Originally posted by x628x isnt it best to have no backpressure with turbo cars?

Of course but when they built these, there for moms driving there kids to school who aren't going to be drag racing, and don't want to hear the engine or exhaust :big grin: