Put stock header back on, now my car pulls harder!!! - Honda Forum / Acura Forum

Johnny Tran · 05-08-2003, 03:27 PM

Well just got done taking the DC sports 4-2-1 off, and put the stock EM back on....

Because of my cams, I needed to sell my DC 4-2-1 header, and get a JDM header with a 2.5'' collector. For now I just put my stock header on, and the car pulls harder just about everywhere with the stock header then it did with the DC sports???

Don't get me wrong, before I had the cams, the DC 4-2-1 felt stronger over stock, but now that the cams are in for some reason the stock EM is doing a better job!!! The piping on the stock one is also larger.

mugenrsx · 05-08-2003, 05:38 PM

Thats wierd. Are you going to dyno the car to see how much u gained with the stock header?

AF22 · 05-08-2003, 06:23 PM

Quote:

Originally posted by Johnny Tran
The piping on the stock one is also larger.

If it's larger shouldn't it put your cams at greater potential over the DC sports...

b16a2racer · 05-08-2003, 06:25 PM

Quote:

Originally posted by AF22
If it's larger shouldn't it put your cams at greater potential over the DC sports...

i would say so, but the jdm header u get will be even better for your setup than stock (or the dc sports header u had)

Nathan123 · 05-08-2003, 06:32 PM

You need to re-calibrate your butt-o-meter. It just doesn't make sense.
Try a dyno or 1/4 mile to verify your claim.

CivicSiRacer · 05-08-2003, 06:43 PM

Smaller tubing will increase torque a bit. Which is why if you want torque you shouldn't get a catback exhaust and headers.

AF22 · 05-08-2003, 07:22 PM

Quote:

Originally posted by b16a2racer
i would say so, but the jdm header u get will be even better for your setup than stock (or the dc sports header u had)

But wait, why do we buy DC sport headers if the piping is smaller then stock?

b16a2racer · 05-08-2003, 07:57 PM

Quote:

Originally posted by AF22
But wait, why do we buy DC sport headers if the piping is smaller then stock?

cause based on the OEM engine setup most are running, it adds slightly more torque/hp than the oem piping

ALL C5 · 05-08-2003, 08:35 PM

Two things that have been said are correct.

1-longer piping does increase power and torque slightly
2-smaller piping does increase torque slightly, especaily bottom-end torque.

Because of these two reasons i would say you may feel a difference because of the torque factor. Having more torque makes things seem more powerful when they really aren't.

The reason why you buy a dc 4-2-1 is to get bigger piping and to match cylinders up with their opposing clyinders, to make sure that a less of a chance of the pulse from a corrisponding cylinder does not travel into another, which creates more power.

I would say you have gained some torque with swapping back to stock EM, but have lost some power.

Did you have the car tuned with the dc 4-2-1 header? if you did not this may also be a reason why you have felt a power increase.
But i would most likely say that having slightly more torque has made the car feel like it has more power, but in reality it does not.

b16a2racer · 05-08-2003, 08:37 PM

dude run another dyno test, i wanna see this

Johnny Tran · 05-08-2003, 11:26 PM

Well I'm not going to dyno the stock header because its just on there until my JDM header comes in...

The stock headers piping is def larger then the dc 4-2-1 thats obvious just by looking at it.

And yes I did have my car tuned with the 4-2-1, and it ROBBED power big time. The dyno after the JDM header is on will show that.

Again if you are just looking for a I/H/E setup the 4-2-1 is a good choise, but for my set up, it just doen't/can't do the job.

Johnny Tran · 05-08-2003, 11:29 PM

Quote:

Originally posted by AF22
But wait, why do we buy DC sport headers if the piping is smaller then stock?

Its smaller piping is most likely more free flowing, but I can take pics of the two if you like, the stock piping is DEF bigger then the DC.

Basically the stock header with the cams just feels smoother then the dc 4-2-1 did. Obviousy both are robbing power for my setup, but the stock one feels better then the DC 4-2-1.

You_Get_Vapors · 05-08-2003, 11:43 PM

You shoulda had a 4-1 header from the beginning. You wouldnt be having this problem now. LOL

Johnny Tran · 05-09-2003, 12:25 AM

Quote:

Originally posted by You_Get_Vapors
You shoulda had a 4-1 header from the beginning. You wouldnt be having this problem now. LOL

Yeah yeah yeah

ironmonkee · 05-09-2003, 08:35 AM

Quote:

Originally posted by Johnny Tran
Its smaller piping is most likely more free flowing, but I can take pics of the two if you like, the stock piping is DEF bigger then the DC.

Wait until you get the DC Sports JDM 4-1. Compare that with the piping on the stock one and you'll see that the stock piping is way smaller than the DC Sports JDM. I just installed it with a new high-flow cat w/ a JDM 2.5" collector yesterday and I can tell a difference already-especially when I run the A/C now. Can't wait to get the B20 in there! Trust me, you'll enjoy that JDM 4-1! :vpleased:

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