pipe diameter size??

[rice]

my car 7th gen corolla, ae102, how big would you go for the exhaust pipes? is 2 1/2" inches be too big for our 4 cylins.?? what about 2 1/4" inches?? its for the whole pipes from the cat converter to the muffler, my friend has i think 2 1/4" inches on his and he lost some good low end torque, thanks for any input

[Flashmn]

I had 2" pipe on my NA car.

[rice]

Originally Posted by Flashmn

I had 2" pipe on my NA car.

how did it handle?? what do u have now? thanks

[polo708]

id stick with either 2" or 2.25" anyhting bigger would hurt your powerband

[Flashmn]

Well... how would an exhaust pipe affect handling? :P

Now I have 2" from the cat back and 2.5" to the cat.... since I'll be running forced induction.

[TokyoRacer]

On me ae92 with a 4afe I had 2.25" Exhaust piping.

[digital_racer]

I'm on 2". They say that if the pipe diameter is too big, it would result in a drop in pressure and increase in gas density making it a hard time for NA engines to push the exhaust gases.

[punter]

Originally Posted by Flashmn

Now I have 2" from the cat back and 2.5" to the cat.... since I'll be running forced induction.

Just a qusetion, why would you choke it up after the cat like that?? keeping thje pipe the same size over the whole exhaust is benifical for flow.

[sxlostv1]

my friends scion runs 1.75 straight pipe. for corollas i say 2.0 is perfect.

[polo708]

im running a supercharger, intake and FULL exhaust with hi-flow cats/resonators... im running a 2.25" piping. JP designed the midpipe and 2.25 was teh most efficient for FI. 2" would probably be a bit better for N/A