race header question?

boca1 · 02-08-2008, 06:55 PM

i talk to nate today about a race header and comptech sc combined and he said definately NOT recommended!!

i am still waiting to hear back from hondata whether or not it will be ok..

nate said these cars will lean out with the race header and sc ..

can anyone give more info ......could it be possible he was just trying to sell me his shorty header considering his header is the only one for this car thats not race style? please let me know what you think
thank you!

***Zeuceone*** · 02-08-2008, 07:00 PM

its possible.

vtecmike1 · 02-08-2008, 07:06 PM

they say that so you'll buy there shorty header. theres plenty of dynos to proove its possible and perfectly safe. "afr" wise. we are NOT rsx's. rsx's have problems with race headers because there ecus are not as smart as ours. we on the other hand have no problem with race headers.

boca1 · 02-08-2008, 07:19 PM

doug at hondata just responded to me and sais it should be fine...but has not been tested....so he said just check the afr and make sure not to hit 13 or higher..

Jimmysaintjames · 02-08-2008, 08:31 PM

Quote:

Originally Posted by boca1

doug at hondata just responded to me and sais it should be fine...but has not been tested....so he said just check the afr and make sure not to hit 13 or higher..

The headder alone should not affect the afr enough where you should have to worry.

kenny rogers · 02-09-2008, 09:24 PM

I would say just the opposite - a race header has larger primaries & better flow. Race headers have larger primaries & better flow, perfect for a high volume/tempurature FI engine.

The air-fuel ratios will not be affected with the addition of a race header.

***NitrousG35*** · 02-09-2008, 09:31 PM

There is a guy selling his Comptech prepared 2006 Si that was a test bed for Comptech products. He has the Comptech S/C along with the Comptech header. If a shorty works, I don't see why a Race Header wouldn't be able to work as well. This is a good question though. It certainly would be worth talking to either Comptech or Chris at RedShift to get their input.

http://www.8thcivic.com/forums/8th-g...ch-usa-si.html

reaper702 · 02-09-2008, 09:54 PM

shouldn't affect AFR with our cars, as someone previously stated, we do NOT have the same problem as rsxs...

plus wasn't there someone with a comptech s/c + rh (may have been the dcrh) with something around 250-260whp?

jeremy0203 · 02-09-2008, 10:09 PM

comptech SC with BCRH here, no probs what so ever, my car actually runs rich, you can smell it when i push the car hard

reaper702 · 02-10-2008, 02:21 AM

Quote:

Originally Posted by jeremy0203

comptech SC with BCRH here, no probs what so ever, my car actually runs rich, you can smell it when i push the car hard

***mad monkey*** · 02-10-2008, 03:58 AM

There's a member, to177si he has a BCRH and Comptech SC... his dyno and afr's turned out fine from what he said. You should pm him and ask him about it.

liquidr1 · 02-10-2008, 11:36 AM

Well it states on their web page for the S/C that to achieve additional power that the addition of Intake, HEADER, and exhaust is recommended.

So yea

***Highrev1*** · 02-10-2008, 04:58 PM

Less restriction means lower PSI with a power increase. So going from a stock setup to a race header you will loose PSI but gain power...And that really is the key Most power out of the lowest Pressure. So even though your flowing more air the PSI acutally decreases due to the opening up of the "bottleneck", yet power increases.

Lotsa guys on here run a race header with their Comptech kit, I am sure its FINE!!

dualdiagnosis · 02-10-2008, 05:06 PM

Highrev, is there any negative changes to a/f with just running a race header though?

***Highrev1*** · 02-10-2008, 05:09 PM

Like just running one stock? Or with the charger?

dualdiagnosis · 02-10-2008, 05:10 PM

Just stock.

***Highrev1*** · 02-10-2008, 05:19 PM

From what I have read on the forum here...Its fine I haven't personally datalogged any A/F's yet...But a quick search found this

"rh will not make you run dangerously
lean on the stock ecu, despite the rumors you may hear on the forum"

"rh did lean the car out about 1 point across the powerband, which in fact does not make the car dangerously lean. this is also only at wot."

But I dunno for sure, I would suggest datalogging your A/F's if you REALLY want to be safe, but most use it and haven't had any issues.

dualdiagnosis · 02-10-2008, 05:30 PM

Thanks for the reply. I just get a little OCD about my cars and want to be safe because I haven't had the a/f checked at all.

boca1 · 02-10-2008, 05:38 PM

well thanks for all the input..i guess it will be safe...i am running a wide band also ..so when i put the sc on i will be able to moniter it...

02-08-2008, 06:55 PM	#1 (permalink)
boca1 Senior Member Join Date: Dec 2007 Location: TAMPA Age: 26 Posts: 525 iTrader: 1 / 100%	race header question? i talk to nate today about a race header and comptech sc combined and he said definately NOT recommended!! i am still waiting to hear back from hondata whether or not it will be ok.. nate said these cars will lean out with the race header and sc .. can anyone give more info ......could it be possible he was just trying to sell me his shorty header considering his header is the only one for this car thats not race style? please let me know what you think thank you!

02-09-2008, 09:31 PM	#7 (permalink)
*NitrousG35* Mr. Cowl Induction Join Date: May 2007 Location: To Infiniti and beyond... Posts: 9,811 Wild VTEC'n Bill iTrader: 3 / 100%	There is a guy selling his Comptech prepared 2006 Si that was a test bed for Comptech products. He has the Comptech S/C along with the Comptech header. If a shorty works, I don't see why a Race Header wouldn't be able to work as well. This is a good question though. It certainly would be worth talking to either Comptech or Chris at RedShift to get their input. http://www.8thcivic.com/forums/8th-g...ch-usa-si.html __________________

02-10-2008, 03:58 AM	#11 (permalink)
*mad monkey* I do look like a monkey Join Date: Mar 2007 Location: bay area Posts: 1,428 Jeremy iTrader: 1 / 100%	There's a member, to177si he has a BCRH and Comptech SC... his dyno and afr's turned out fine from what he said. You should pm him and ask him about it. __________________ My Mods: Home made CAI, BCRH, QTP Electric Cutout, P2R TB spacer and thermal gaskets, Hondata IMG

02-10-2008, 04:58 PM	#13 (permalink)
*Highrev1* 8thcivic Sponsor Join Date: Mar 2006 Posts: 3,681 iTrader: 1 / 100%	Less restriction means lower PSI with a power increase. So going from a stock setup to a race header you will loose PSI but gain power...And that really is the key Most power out of the lowest Pressure. So even though your flowing more air the PSI acutally decreases due to the opening up of the "bottleneck", yet power increases. Lotsa guys on here run a race header with their Comptech kit, I am sure its FINE!! __________________ BUY MY CIVIC

02-10-2008, 05:09 PM	#15 (permalink)
*Highrev1* 8thcivic Sponsor Join Date: Mar 2006 Posts: 3,681 iTrader: 1 / 100%	Like just running one stock? Or with the charger? __________________ BUY MY CIVIC

02-08-2008, 07:06 PM	#3 (permalink)
vtecmike1 Senior Member Join Date: Nov 2007 Location: Simi Valley Age: 24 Posts: 1,231 Mike iTrader: 0 / 0%	they say that so you'll buy there shorty header. theres plenty of dynos to proove its possible and perfectly safe. "afr" wise. we are NOT rsx's. rsx's have problems with race headers because there ecus are not as smart as ours. we on the other hand have no problem with race headers.

02-08-2008, 07:19 PM	#4 (permalink)
boca1 Senior Member Join Date: Dec 2007 Location: TAMPA Age: 26 Posts: 525 iTrader: 1 / 100%	doug at hondata just responded to me and sais it should be fine...but has not been tested....so he said just check the afr and make sure not to hit 13 or higher..

02-09-2008, 09:24 PM	#6 (permalink)
kenny rogers Senior Member Join Date: Sep 2007 Location: Western Washington Posts: 247 Greg iTrader: 0 / 0%	I would say just the opposite - a race header has larger primaries & better flow. Race headers have larger primaries & better flow, perfect for a high volume/tempurature FI engine. The air-fuel ratios will not be affected with the addition of a race header.

02-09-2008, 09:54 PM	#8 (permalink)
reaper702 Senior Member Join Date: Jul 2006 Location: Sin City Age: 21 Posts: 4,026 iTrader: 6 / 100%	shouldn't affect AFR with our cars, as someone previously stated, we do NOT have the same problem as rsxs... plus wasn't there someone with a comptech s/c + rh (may have been the dcrh) with something around 250-260whp?

02-09-2008, 10:09 PM	#9 (permalink)
jeremy0203 Senior Member Member Join Date: Jun 2007 Location: Saint Marys, GA Age: 23 Posts: 2,427 Jeremy iTrader: 6 / 100%	comptech SC with BCRH here, no probs what so ever, my car actually runs rich, you can smell it when i push the car hard

02-10-2008, 11:36 AM	#12 (permalink)
liquidr1 Senior Member Join Date: Jun 2006 Location: Greensboro NC Age: 24 Posts: 1,420 Dustin iTrader: 0 / 0%	Well it states on their web page for the S/C that to achieve additional power that the addition of Intake, HEADER, and exhaust is recommended. So yea

02-10-2008, 05:06 PM	#14 (permalink)
dualdiagnosis Senior Member Join Date: Aug 2007 Location: A hot place Posts: 546 iTrader: 0 / 0%	Highrev, is there any negative changes to a/f with just running a race header though?

02-10-2008, 05:10 PM	#16 (permalink)
dualdiagnosis Senior Member Join Date: Aug 2007 Location: A hot place Posts: 546 iTrader: 0 / 0%	Just stock.

02-10-2008, 05:19 PM	#17 (permalink)
*Highrev1* 8thcivic Sponsor Join Date: Mar 2006 Posts: 3,681 iTrader: 1 / 100%	From what I have read on the forum here...Its fine I haven't personally datalogged any A/F's yet...But a quick search found this "rh will not make you run dangerously lean on the stock ecu, despite the rumors you may hear on the forum" "rh did lean the car out about 1 point across the powerband, which in fact does not make the car dangerously lean. this is also only at wot." But I dunno for sure, I would suggest datalogging your A/F's if you REALLY want to be safe, but most use it and haven't had any issues. __________________ BUY MY CIVIC

02-10-2008, 05:30 PM	#18 (permalink)
dualdiagnosis Senior Member Join Date: Aug 2007 Location: A hot place Posts: 546 iTrader: 0 / 0%	Thanks for the reply. I just get a little OCD about my cars and want to be safe because I haven't had the a/f checked at all.

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02-10-2008, 05:38 PM	#19 (permalink)
boca1 Senior Member Join Date: Dec 2007 Location: TAMPA Age: 26 Posts: 525 iTrader: 1 / 100%	well thanks for all the input..i guess it will be safe...i am running a wide band also ..so when i put the sc on i will be able to moniter it...

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