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Back from the dyno: Too big of a header = Bad for a relatively stock motor

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Old Jun 20, 2006 | 08:25 AM
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Default Back from the dyno: Too big of a header = Bad for a relatively stock motor

Edit: the header was a custom Lovefab big tube header....really nice piece...just too extreme compared to my other parts

OLD TUNE w/ stock injectors, smaller T1R header, and hiflo cat instead of testpipe




Related Parts for the New Tune:

Hondata S200
Mugen intake
b&m fpr
siemen dekas 310cc
Lovefab custom header
SMS test pipe
T1R version 1 exhaust




Welp I guess the name of the game is trial and error....and yesterday at the dyno definitely proved I chose the wrong header for my application. I knew the thing was huge, but I didnt think in a million years I would have lost HP and TQ.....after I installed the header I felt that the car was revving slower in the lower rpm's but I thought that my mind was playing tricks on me. Apparently it was dead on.

After a full hour of tuning I could not get back to where I started with my old T1R header.....other additions were the 310cc Seimen Dekas........

So my fuel problem is sorted out, but this header is just too big....tuner said to warrant using that header I would need cams and higher comp or a 2.0 liter

FACCCCK oh well.....I spent 270 at the dyno and about 500 something for the header including making it fit my car.....so I spent about 770 to lose a lot of midrange torque and to lose a bunch of HP up top......suxors

Oh well, every experiment is a success as long as i learned something from it. My tuner and me want to keep this motor simple....so we are trying to see what we can do with stock block and head.... so I think the 2.0 litre idea and cam idea are out the window.....I'll just have to man up and get a header that was made for my mods instead of springing on good deals.

Man this header would be perfect and the quality is great....just I dont have the mods to flow enough for this header to make power....it sounds good though ROFL

Pixors will be up tonight......after I nurse my wounds.......the dyno sheet is sad....so I might just put up pictures of the car on the dyno because the dyno sheet is serously depressing.


Modified by jdmspoonitr at 9:35 AM 6/20/2006


Modified by jdmspoonitr at 12:03 AM 6/21/2006


Modified by jdmspoonitr at 11:47 AM 6/22/2006


Modified by jdmspoonitr at 11:47 AM 6/22/2006
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Old Jun 20, 2006 | 09:16 AM
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Live and learn man. Well, now you have a excuse to build an extreme 2L monster!
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Old Jun 20, 2006 | 10:36 AM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (jdmspoonitr)

just keep the header until you decied to get higher compression pistons and agressive cams. your car would run really nice then.
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Old Jun 20, 2006 | 11:01 AM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (Black Mamba)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Black Mamba &raquo;</TD></TR><TR><TD CLASS="quote">just keep the header until you decied to get higher compression pistons and agressive cams. your car would run really nice then.</TD></TR></TABLE>
i agree, adding CTR pistons and a set of mild cams isn't taking things out of perspective if you and the tuner "want to keep the motor simple" i'm willing to bet with those 2 mods i just mentioned you'd net 40-50 hp combined with that header... think about it
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Old Jun 20, 2006 | 11:20 AM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (JUN.R)

Hmmmm yah......see the thing is I'm getting a new car soon and the R will just be for fun days at the track. I kinda want to just get the ITR to a place where it is reliable and makes good power for track days.....its not a drag car so max HP doesnt really mean too much to me....I just want to be confident that the car will be reliable to drive down to the track and back.....I really dont want to have to worry about the reliability or lifespan of the motor....

More HP = More wear and tear

And while driving at an event the last thing I want to be worrying about is whether my car can actually make it back home.....I guess I have some decisions to make this week....we'll see


I have been toying with the idea of slightly higher comp pistons, upgraded valve train and cams.....but then after I do that I'd still want to do more like ITB's

I guess this is my 1000th attempt to try and just be happy with the way it is and stop modding the thing....but we know how that all ends up....ROFL
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Old Jun 20, 2006 | 11:28 AM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (jdmspoonitr)

hey but you are set for future mods. just incase you go after market cams or whatnot

so you are good to go now
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Old Jun 20, 2006 | 11:30 AM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (JUN.R)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JUN.R &raquo;</TD></TR><TR><TD CLASS="quote">i agree, adding CTR pistons and a set of mild cams isn't taking things out of perspective if you and the tuner "want to keep the motor simple" i'm willing to bet with those 2 mods i just mentioned you'd net 40-50 hp combined with that header... think about it</TD></TR></TABLE>

that would be my ride soon
ctr pistons+rm m 22xx+anr standard header=
only if it starts

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Old Jun 20, 2006 | 11:32 AM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (jdmspoonitr)

do you have a US or JDM B18C motor?

please post your dyno graph. My friends and I have dynoed many times @ DSR and we all have B18C's. it would be fun to compare.
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Old Jun 20, 2006 | 12:32 PM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (Downey)

What up Graham!!! Hahahah long time no see.....yah I was the one there when they called you for those 36mm axles

I will post the graph since you requested and keep in mind that this was a hot *** day
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Old Jun 20, 2006 | 12:40 PM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (jdmspoonitr)

i said CTR pistons and a set of mild cams, that's nothing close to max HP, IMO would be just enough to make that setup sufficiant. obviously you're trying to get something from buying the biggest baddest header you can find... what's the matter with a (couple) parts needed to compliment it? the pistons are even OEM Honda...

post pics of the graph and the header
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Old Jun 20, 2006 | 12:50 PM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (JUN.R)

How big is the new header?
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Old Jun 20, 2006 | 01:09 PM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (Type-R Yo!)

Bigger cams and bump compression


You've got all the supporting hardware it seems with fuel management and the header.
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Old Jun 20, 2006 | 11:02 PM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (88 rex)







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Old Jun 20, 2006 | 11:04 PM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (jdmspoonitr)

I will post the graph once my tuner sends me an overlap of my old graph and the new graph.....the one I have right now just has the new graph and would be no good for comparison....should have it tomorrow
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Old Jun 21, 2006 | 04:07 AM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (jdmspoonitr)

Why do you have such big injectors? Your stock injectors should have been fine for your setup. Even a 270cc Prelude injector would have been too much and required injector multiplier adjustment.

What was your airfuel (Can you post it on the graph)?
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Old Jun 21, 2006 | 07:21 AM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (Asahi)

Header design is a little different. I don't think I've seen that one before.
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Old Jun 21, 2006 | 07:51 AM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (88 rex)

cam it
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Old Jun 21, 2006 | 07:53 AM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (88 rex)

Build a 2 liter! So what header are you thinking of getting now?
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Old Jun 21, 2006 | 10:05 AM
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Default Re: Back from the dyno: Too big of a header = Bad for a relatively stock motor (redGSRguy)

If I stay with current setup and only want to swap the header it would be for a DTR custom long tube.....but that is because he is local and can help me if i have any issues....I am also considering mild cams, higher comp pistons and maybe some porting of the head while i'm at it.....

The A/F was stoich until about 6000 where it started getting rich.

I am using 310cc because my 240cc were maxed out at 178 whp....there wasn't much room for more power on stock injectors so I got ones that would be able to supplement the later modifications....but I guess those mods might be coming sooner than later....
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Old Jun 21, 2006 | 10:06 AM
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dyno chart?
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Old Jun 21, 2006 | 10:15 AM
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Default Re: (GUILOTINE)

waiting on DSR to send it to me....I only have the new graph I want to look at the old tune vs. new tune so we can compare a little
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Old Jun 21, 2006 | 10:22 AM
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Default Re: (jdmspoonitr)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmspoonitr &raquo;</TD></TR><TR><TD CLASS="quote">waiting on DSR to send it to me....I only have the new graph I want to look at the old tune vs. new tune so we can compare a little</TD></TR></TABLE>

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Old Jun 21, 2006 | 02:55 PM
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Default Re: (jdmspoonitr)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmspoonitr &raquo;</TD></TR><TR><TD CLASS="quote">waiting on DSR to send it to me....I only have the new graph I want to look at the old tune vs. new tune so we can compare a little</TD></TR></TABLE>

id agree with DSR, CAM it and stroke IT!!!

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Old Jun 21, 2006 | 10:49 PM
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Default Re: (Jordo@KAP)

Well if I'm gonna spend like 2000 dollars on cams and pistons and tuning I might as well spend another 1000-1500 and get a ******* K24 ahah
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Old Jun 22, 2006 | 06:51 AM
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Default Re: (jdmspoonitr)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmspoonitr &raquo;</TD></TR><TR><TD CLASS="quote">Well if I'm gonna spend like 2000 dollars on cams and pistons and tuning I might as well spend another 1000-1500 and get a ******* K24 ahah </TD></TR></TABLE>

a ******* k24 sounds good to me

I wish i was in the bay area to get DSR to help me out with my tune.
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