Hey guys so my h22a is ready to run and will probably be up by today or tomorrow. My exhaust is short by like half a ft between the dp and catback. The question is will running open header or open downpipe be bad for the car. Also I was planning on going to the track sunday as they are letting us have a day session for $20!!!
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If you were just going down the street to get it fixed I would say drive it but if you are going to track I would not do it. -
ya I figured that but I probably won't have it fixed anytime soon. So was wondering if there were any cons other than I will loose lots of low end torque and be loud as hellComment
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if ran too long with out proper exhaust you run a risk of warping a exhaust valve.
not worth the risk , by far.
A man that keeps looking back can't see whats in front of him.Comment
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I did this on a v8 before it sounded bad ass and felt bad ass till I COOKED them valves not fun at all. Ohh and im partial deff because of this to not worth it at all. Down the street to get fixed ok but long distance and joy rides wouldnt risk it.Comment
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ive seen open header h22a do better like that then with exaust we run our car like that at the track and do better times...then with exhaustComment
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If you have the downpipe installed, I see no reason why the exhaust valves would ever get burned. It's only those with no header or no downpipe that risk burning valves.
People put exhaust cut-outs between the downpipe and cat.....essentially an "open header"My Member's Ride Thread
Bisimoto header before & after dyno
1993 10th Anniversary: F22a6, H23IM, Bisimoto header, Custom mandrel exhaust, 5spd swap.Comment
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o and remember this! let the motor break in dude, thats if the motor came from them companies were you buy motors from....dont start racing it right away dude...
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"I ran open header once, it was sooooo loud little kids were running for cover as I was cruising at 2000rpms. That was enough to know I shouldn't floor it."Comment
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Thanks for all the responses.
Came from hmotorsonline. Ya I've decided to pass on the racing for now until I feel safe with my car.Originally posted by pedroalcala View Post
I'm only running open dp until next week. I'm getting some piping and welding flanges on the ends to complete the exhaust. The only commuting I will be doing is to school which is a 5 min drive. So basically I can't run hard because it's new and also because I have potential in burnin my exhaust valve. Will there be any heating problems when having a exhaust that short?
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I run open dp on the steet every once in a while but boosted. N/A with open header is way too loud IMO. I wouldn't do it, everyone is going to be looking at you plus what if there is a cop behind you or beside you? he'll know right away by the smell and the sound that it's not just an exahust leak lolComment
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Sooo after playing with my exhaust a little today I found out that one straight part of the exhaust was adjustable
...So ya problem solved. It should fit but thats for tomorrow to put it in. 
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