Pipe Diameter

[803tc]

Just wondering how big is too big for exhaust piping? i was going to go with 2" all around, is that too big? Any other performance advice would be gladly accepted.

 

My name is Lee and I'm from the US. I own a 1980 corolla te72 with a 3tc engine/automatic transmission.

[styler]

2 inch for NA stock

2 1/4 inch NA performance

2 1/2 inch turbo

3 inch turbo performance

 

something like that.

[Hurricane]

yeah i would run 2 1/4'' or 2 1/2'' for an N/A motor ive really found the bigger ive gone the power only gets better on my worked motors

 

but i guess for a stock 3t 2'' would be fine

Edited November 1, 2008 by Hurricane

[parrot]

I have 2 1/4 mandrel on a worked 1600cc 4AGE and it is too loud and raspy in my opinion despite a high flow cat and lukey muffler. I actually asked for 2 1/4 pressed bends working on the premise that would be about 2 inch restriction but they did mandrel.

 

I would prefer 2 inch personally.

 

Can't make any informed comment on how it would effect performance either way.

[philthy30]

2 inch for NA stock

2 1/4 inch NA performance

2 1/2 inch turbo

3 inch turbo performance

 

something like that.

 

 

 

i build exhausts for a living and i have found that generally smaller is better i think 2 inch pipe on a n/a motor is ample. as for a turbo application i would be going for 2 1/4 of 2 1/2 max this gives alot better sound and allows the exhaust to leave the head quicker. all depends what the size of the pipe leaving the headers is theres no point going any bigger than they can flow

[Hurricane]

i had 2'' on my worked 3tc when i first built it, went ok, but went a hell of alot better after i built my 2 1/4 zorst with one straight through muffler on it, didnt do any dyno testing but would never run under 2 1/4 again, and on my bro datto 1200 with a L18 2ltr it was the same deal but he went to 2 1/2 stainless that we made.

 

the only thing is it alwasy getts lounder, on all my cars i run a straight through offset muffler and it always seems to work best for power.

 

only real way to tell on your motor is to play around, but will still depend on headers, cam and motor spec's