I was wondering if you take off your exhaust and run just your header can it hurt your 1/4 mile times? I was thinking of trying it but wasn't sure if it will help or hurt me. I run a 90 Crx with stock JDM B16a with 75-shot dry nitrous if that helps. TIA!!

 

Less weight and more flow: it'll only make you faster.

Backpressure is a myth...look it up sometime if you want the physics behind it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Archidictus &raquo;</TD></TR><TR><TD CLASS="quote">Less weight and more flow: it'll only make you faster.</TD></TR></TABLE>

Is that for every set-up? Others reply also please but Thank you!!

 

i run open header everytime i go to the track and it'll help especially since you're on the nitrous and less weight

 

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

Is that for every set-up? Others reply also please but Thank you!!</TD></TR></TABLE>

I know I'm not "others," but I'll add this:

You need some sort of exhaust manifold to achieve scavanging, but, in your case, the less weight and the more flow, the better. Catalytic converters don't get along well with nitrous, either.

 

my friends both uncorked their exhausts at the track and it did NOTHING at all. so instead they stripped everything halfway removable out of their cars including CD players and guess what?? it did absolutely nothing again. i told them so.

 

I don't run a cat. converter right now just straight pipe into my custom bent 2.5" piping all the way to the tip. So is it even worth the time and effort to take it off?

 

your friends must suck

 

Are you going to make me put my ear plugs in for your car to ( lol ). I just wanted to say hi (SadisticRacing)

John@M&H-Hashims

 

It's loud right now with the exhaust can't imagine what it will be like if I take it off..Hope your doing good and I'll see you in Fontana.(Not racing just going down to watch and hang out with STR.)

 

I run open header

 

I think I'm going to try it at my next race to see how much it helps and then decide. I really want mid 12's so with some M&H slicks-open exhaust-weight reduction-and some motor goodies I should be there.

 

i can tell you from my experiences it depends on set ups .
i ran open header on ym R when it was closer to stock and stock header, i ran the same times with and with out, but ran slower traps with it off. also felt great off th eline , but lacked in the top end.
NOW open JDM 4/1 felt great, we picked up mph and dropped et's.
turbo set ups and open dp is shifty sometyimes too , i dynoed 8psi one time with the exhasut on and with it off and lost like 10-15whp with it off. gained it back when put back on . but the spool up and times were sick with it off. never ran with it on with the turbo

dunno if this helps much , but i try to run it on diff set ups to see the diff.

 

I have a DCSports header so will I pick up anything also will running 100 octane gas help my times at all? Right now I'm running 91 because that's the highest pump in Cali

 

i tried it with my b16 set up, no cat, and found that it didn't do anything...actually when i think about it, i believe it hurt my et. had to do with the backpressure. but it was worth the try...any little thing can help...why do you think people race without their carpet in...hehehe

 

LOL-carpet removal gains .3 in the 1/4 mile right. J/K!!!

Does anyone know about if switching to only 100 octane gas from 91 octane will help out at all..


Modified by SadisticRacing at 12:25 PM 10/9/2003

 

it will if you have NA or higher compression ,How race gas makes more wpoer as far as i know it so you can advance the timing and tune out detonation

 

I run a ZC with a 65 shot, dry, and ran the same e.t. with the exhaust and straight pipe, as I did without the exhaust.
13.61@99.66 this was at 5000ft above sea level.

Gary

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1 2 NV &raquo;</TD></TR><TR><TD CLASS="quote">my friends both uncorked their exhausts at the track and it did NOTHING at all. so instead they stripped everything halfway removable out of their cars including CD players and guess what?? it did absolutely nothing again. i told them so. </TD></TR></TABLE>

sounds like your friends can't drive and aren't consistant or something.

power to weight ratio just called me up and said "your friends just can't drive"

More power
Lighter Car
FAster Acceleration

err...

 

take a almost stock full interior ITR and strip a whoppin 70lbs out of it and u think its goin to go faster??? ur dreaming buddy.

o yeah i forgot to add u lose almost all ur backpressure through the exhaust too = loss of power

 

sorry about that

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1 2 NV &raquo;</TD></TR><TR><TD CLASS="quote">take a almost stock full interior ITR and strip a whoppin 70lbs out of it and u think its goin to go faster??? ur dreaming buddy.

o yeah i forgot to add u lose almost all ur backpressure through the exhaust too = loss of power</TD></TR></TABLE>

if you take 70lbs out of your car.. once again. you will go faster.

i'm saying on "real" experience and what I have tested at the track.
100lbs = .02 - .03 tenths

Oh, and taping the front bumper and removeing teh rear bumper will help you .04 tenths even on a stock car. (yeah, i did this. brought 2 sets of bumpers and kept them in teh car so weight wouldnt change. lost .4tenths on a stock car)

Drag racing is about aerodynamics, power to weight ratio and the biggest part is... "The Driver" experience is everything and while having everything is still nothing if you can't drive it

 

(DX hatch)
stock = 16.4 @ 80
bumpers = 16.1 @ 84

 

ill have to get his B4 and after timeslips. if i remember correctly his timeslips are almost identical from 60' on down the 1320.
now that u have seen my friends experience through my words now ill tell ya mine directly. at our track we can have passengers so here i make most passes solo. then step in my gf (105) what happens??? not a damn thing. 60's are the same and down the line. im not saying weight wont change times cause it will, but u need to remove alot more weight than just seat and interior items. i do believe u about the bumpers and taping, that was not done on my friends car.

 

any downsides for running open header on a d16z6 for daily driving? aside from the excessive noise and smell. gas mileage affected?