Maximum exhaust piping for H22a

[Baopham]

what is the maximum exhaust piping size for the H22A with out losing torque???
i am thinking of doing a h22a swap and where else to get info on it then in the prelude forums.. help me out guys.. thanks

[McChook]

2.25 to 2.5 should be fine
and...
http://www.preludeaustralia.com - plenty of conversion info there - just search

[Baopham]

thanx

[redliner]

if u get 2.5 u'll gain top end but lose bottom end
thats wat happened to me
i say 2.25

[Baopham]

with 2.25, do i still gain top end?

[azjs]

Depends on what else is done to your engine

-az

[flipmods]

I would go 2.25 and get the best of both, top and bottom end power assuming you car is not fully worked.

[WPN.22R]

2.25 is tops!! :thumbsup: ive even been running my car with the turbo set up with 2.25 :eek: (soon to change), and it works really good, have you done any other mods to your engine... cos from the tests ive done with a open pod KnN filter and 2.25 exhaust.. i lost out about 500revs top end... with the standard box it revved all the way, but slightly yuk bottom end.

[ginganggooly]

the blokes in the states with serious mods to k20's and b20's are running 3" systems these days it seems. i'd imagine that a worked h22a would have a similar requirement being a 2.2l and all.

[McChook]

the blokes in the states with serious mods to k20's and b20's are running 3" systems these days it seems. i'd imagine that a worked h22a would have a similar requirement being a 2.2l and all.
I'd agree when it came to top end - but few H22s are making big power in Australia - and by big power, I gues I mean over 150fwkw... I think Elee (WPN.22R) should be going to 3", but with 2.25, it would be great down low, which is something you lose when you go turbo...

[WPN.22R]

yes most definately 3" my friend!! ;)

[edw-R]

2.25" should be fine for street. If you always on the track, try 2.5". Good luck!!

[stoff]

can anyone give me an idea of how much i should be paying for custom 2.25" piping?

i'll be supplying my own muffler..

[viperx]

i agree, 2.5 is a bit uncomfortable on the road from experience. 2.25''? try around 200 for press bent?

[stoff]

whats the stock piping size anyway on a 5th gen?

[PimpINjock]

2.5" is not optimal cause u loose bottom end torque and thats exactly what makes these engines so wonderful to race. You could get away with 2" but 2.25" is the best.
If u buy a stroker kit then 2.5" would be good.

[JDM Element]

go with the 2.25, u will have good results for a street car, as it will gain power but still be very drivable on the roads. 2.5 = less drivable on streets, but better for track when in high rpm most of the time..

[stoff]

what is the stock piping size on a 5th gen anyways?