I fitted my J's Racing 4-2-1 to my JDM ITR at the weekend, and im impressed with the build quality... But ive got a few questions..

The exhaust note seems to have lost its 'edge' its still sickeningly loud at WOT but its just lost a bit of the 'bite' (noise wise) it had previously.. (Its got a JIC JDM Decat, and Kakimoto Hyper2000+ N1). It also sounds a bit more 'hissy' when pull away from low revs.. Does anyone have any experience of this sort of thing and is there any explanation?!

Ta!

Heres the pics!






Modified by garylythgoe at 9:47 AM 10/21/2005

 

looks clean

 

no tranny vin?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KnowForever &raquo;</TD></TR><TR><TD CLASS="quote">no tranny vin?

</TD></TR></TABLE>

RHD

 

The exhaust note will change with the changing of the exhaust manifold.

That said:

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by garylythgoe &raquo;</TD></TR><TR><TD CLASS="quote">It also sounds a bit more 'hissy' when pull away from low revs..</TD></TR></TABLE>

I would check to make sure this is not an exhaust leak, just to make sure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KnowNothing &raquo;</TD></TR><TR><TD CLASS="quote">no tranny vin?
</TD></TR></TABLE>



JDM ITR's do not have VIN numbers.

 

i doubt you have an exhaust leak. when switching from a cast manifold (which insulates sound very well) to a tubular manifold (which can amplify sound) you often notice a hissing sound afterwards that sounds similar to an exhaust leak, but is just the air passing through the new manifold. nothing to be concerned with, and you'll stop noticing it fairly quickly.

this is really common on JDM headers especially because they use thinner tubing than most USDM manufacturers.

 

Wow, that header is such eye candy.

I've always noticed a different exhaust tone when comparing stock to aftermarket headers.

 

fix your ground strap

 

i have the same header,
i noticed a change in tone after a couple of weeks, i put it down to breaking in but given the choice i'd like it to sound as it did at first
never noticed any hissing though

 

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

Yup....goes on the silver acorn nut on the left of where you have it now....

Nice header, I am considering one myself..... Do you have the specs like how it is shown below in the picture?

 

It goes where Will it be harming anything?!

So i should notice a change in tone which i have, it seems deeper and less edgy, should it affect the volume levels?

Thanks guys

 

mines fitted about 12 months, its definatley more subdued now, at first when you hit the happy pedal you almost got a mental picture of the gases doing their thing, there was a lovely whine off it, maybe take it off occasionally a de-coke it, yours looks spotless compared to mine

 

The ground doesn't really do anything where it is. You are basically just grounding the valve cover. You need to put it on the valve cover stub so it can ground the motor.

 

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



JDM ITR's do not have VIN numbers.</TD></TR></TABLE>

Ouch! I've been owned! You guys are correct, i didn't even notice the fact that it was a JDM R. I do think that the smartassness of changing my name in the quote was rather uncalled for. Everyone jumps the gun on here thinking you are flaming someone. I glanced at the pic, saw no vin, assumed it was a swapped USDM car with a jdm front. I jumped the gun on that admittedly and was promptly corrected. Just defending myself so i'm not grouped in with most of the other morons on this board.

Anyways, on topic:

Header looks clean as hell! Are you gonna dyno it to see any gains? And what header were you running before? I'm just wondering if the gains outweigh the price.


Modified by KnowForever at 8:27 PM 10/21/2005

 

what intake arm are you using?

 

ARC with an Apexi Filter

Im just not sure im keen on it, im wondering if i should go for a 4-1 JDM 98spec ITR one

 

Do you have a place where you can test how much power the car is making?

You know, get some pretty lines made like this:



OT: I think you should get a larger filter as it appears to be smaller than the factory sized one. It could be choking your car now.....

 

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

Ouch! I've been owned! You guys are correct, i didn't even notice the fact that it was a JDM R. </TD></TR></TABLE>

*pppppfffffftttttt* the long throttle cable that's wrapped around the motor usually is a dead giveaway when looking at the engine bay of a JDM ITR.

 

You guys are all wrong, its a UKDM ITR, no Japanese person can write that good Engrish.

Plus only fruity English people say ta!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Arsenal &raquo;</TD></TR><TR><TD CLASS="quote"> You guys are all wrong, its a UKDM ITR, no Japanese person can write that good Engrish.

Plus only fruity English people say ta!!!</TD></TR></TABLE>

Pretty bold statement regarding the Japanese.... but I'll let you have the fruity part....

 

looks good.......... loose the ps and ac tho it will look better in there plus you can work out when driveing

 

it doesn't look like it has A/C tho...(only 1 factory fan)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rzz &raquo;</TD></TR><TR><TD CLASS="quote">it doesn't look like it has A/C tho...(only 1 factory fan) </TD></TR></TABLE>

Two fans are visible in the picture, as is the A/C condenser.

 

lol...my bad lol
i totally missed the A/C fan and A/C line....

j's racing header since i have the same header too