I see alot of people running there exhaust open at the track, many of which are 13 second cars. For stock cammed, manifolded(is that a word), what if any gains do you get. I know your losing some torque and gainins some top end but is it worth it??

 

For me, more power

 

That is a big *** graph. Made more of an impact on your torque than your power. Anyone else....I'm interested too......

 

Screw peak #'s. Look at what I have in the shift range compared to a bolted exhaust. Free HP.

 

My friends 5th gen SI with a "very lightly" modified LS/VTEC:
With full exhaust and test pipe = 14.0's@95-96MPH
With open exhaust = Consistant 13.40's. Best pass 13.31@100.??

 

very impressive.

vnt

 

Well ill be damned! Those are some nice and very impressive possitive feedbacks. I have always heard of people doing that and even seen it at the local track like the original poster stated. But now i beleive it will be time to test it out.
manny

 

The best part for me is the sound!

8000rpm boosting 10psi with open headers sounds freaking awesome!!!

 

is it better to run no header or with header and no exhaust ???
what do i do just unbolt my header at the race track and take it completly off ???

 

yeah do i just unbolt the header or unbolt the cat from the header?

 

you have to unbolt after hedders. dont want all that hot gas melting anything. ha i did this once in my driveway when i was installing my exhaust. holy crap is it loud or what? at idle sounded like a moster. i like it!

 

is it better to run no header or with header and no exhaust ???
what do i do just unbolt my header at the race track and take it completly off ???

If I am reading this question right I would say NEVER run your car without a header on it. As for performance gains running open header, I got about an extra 3-4 mph on my trap speed. try running with your passenger side headlight out too if its in a civic. thats something a lot of people do, but some dont know.

 

what run w/o a header???? are you kiddin?

 

open exhaust is fun!its hella loud, hehe...kinda makes my car feel fast...oh well...

 

I unbolted the headlight and it slowed me down...hehe. Actully, it was probably the track temps that slowed me down, b/c my bet pass was in the morning... This time out I think I am going to unbolt it from the cat..., open header, see what i can do

 

no header....the **** are yall talkin about......

 

****** a man, ****** a! i love that sound too, especially when it is deep in VTEC country

 

Open header OWNS!

I gained a solid 3.5 mph and dropped a tenth off even spinning a 2.4 60ft.

You dont lose any power, throttle response is a little sluggish from idle to 2.5K to 3K but when you are drag launching at 4K+ its never even gonna be an issue.

Power CURVE is more important than peak #'s at X rpm. TQ is what a drag car needs and free mid range TQ with no loss of power is a solid from me.....one pass down the track made me a believer.

Plus uncorking a can of woop *** on a rumpty thump V8 at 8000 rpm feels good..........four pissed off hampsters at full song can turn some redneck heads "WTF's he got in that there Hon-duh anyhow?"

 

I'm running open header on a B16a with 75 shot. Would i benefit more with an open header or an exhaust system (2 1/4) piping and no cat? Thanks for the feedback.

 

My friend also is his 1989 honda crx si with a b16.
With exhaust he ran a 15.4
W/o exhaust he ran a 14.5

 

wtf????? a whole second off. ****....did he have the stock hf piping?? but thats wonderfull. Too bad my slicks have a hole in it, or i would have tested it myself also. Anyone wanna let me borrow there slicks for the night?
manny


[Modified by mannyman, 1:47 AM 7/30/2002]

 

His crx is an Si. he ran it from the header and he took off the stock intake arm of it and ran it just from the throttle body just left it open sounds crazy huh? he doesn't drive it like that on the streets. just at the track. the only thing he has is a
v-afc. he didn't do it with slicks or anything. he had 00 si rims. if you dont believe me. i will load the pictures into my computer by today or tommorrow.

 

Nothing sounds better than an Un-Corked h22

Both me and my bro run our h22s with open Header. Our average gain at the track was 2-3 tenths and 1.5-2mph on the quarter mile. The sound adds a totally new feeling when rollin down the 1320s

Running no header...woooow umm.....not a good idea


[Modified by Ludehrt, 5:01 AM 7/30/2002]