do any of you guys think that having a 3" custom pipe catback on an jdm h22 a bad idea? Do u think its better to get 2.5" because of the ground clearence and the fact that i think i'm losing some torque. I'm not boosting! but just tuning my h22 with a safc

what do u think? Will effect my performance if i go 3" rather than 2.5"

 

3" is not going to benefit you at all on a stock NA motor. It will actually give you less backpressure. Stay with 2.5", that's all you need.

 

what about 2 1/4? is that restriciting anything or is that good for a jdm h22 with some mods.

 

If you have the choice between 2.25 and 2.5 piping, i'd go w/ the 2.25 piping.

2.25" is good for a well-modded H22. If you get serious, 2.5" may be better

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrecisionH23a &raquo;</TD></TR><TR><TD CLASS="quote">3" is not going to benefit you at all on a stock NA motor. It will actually give you less backpressure. Stay with 2.5", that's all you need.</TD></TR></TABLE>

less back pressure would be a good thing. I think you mean exhaust velocity.

 

Iam going with 4" myself........

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by uncle &raquo;</TD></TR><TR><TD CLASS="quote">

less back pressure would be a good thing. I think you mean exhaust velocity. </TD></TR></TABLE>

Would you care to explain your reasoning on this?

Less backpressure is good for turbocharged motors... not for bone stock NA motors.

 

Backpressure is never good. Essentially your goal is to have no backpressure but generally you will always have a little that you can't get rid of. Here is a thread on it and there are tons of threads about it.

https://honda-tech.com/zerothread?id=409404