Well I constantly see arguements ragin here about what exhaust if any should be put on the ITR and how big what style what desgin whose grandma has one and how you aint dope if you do/dont/otherwise well people go to the link below and have a read of some Aussie test and tune simple and cheap mod for some noticable gain and let me know what you think. I will be performing this mod to my R soon and combined with a decent free flowing cat back I think you would see even more gains:

http://www.autospeed.com/A_1082/P_1/article.html

 

Impressive

Great read,

from Newcastle.

 

Hey mate it is good to see another Aussie ITR owner here on the boards

 

There away something worth reading at AutoSpeed.

I always do search there.....Like when I brought the PowerFC. I'll probably get the commander thur 'em as well.
Thankx.

 

 

Very interesting article

 

autospeed.com, very good webpage, just need to get a cracked password
hehe

 

I´m surprised he left the stock muffler alone.. that thing is huge. I ran a buddies ITR a few times last summer, he had a custom open muffler. We ran 5-8 times and he always had me by 1-2 carlenghts, in the end, we were both able to hear we changed gears at the exact time... to bad dyno tests are ridicilous here in iceland

 

Removing the stock muffler is good for 3-4 whp gains... but the stock unit flows fairly well.

Will
-who will soon have a different muffler to install for 'track' use

 

that´s even more I thought. I was going for a 2,5" system, would it be a better idea now to save money and go with the stock pipeing? but exchange the cat and muffler out?

 

With a modified 'engine' the gains from removing the muffler are even greater.

A 2.5" full system is a good modification... but is a bit cost prohibitive for me.

So.... I will use the stock mid pipe and just install a free flow muffler to install at track events.
I already have the Honda 4 into 1 header and a 2.5" cat.... I just need to remove the 'necked down' section at the front of the mid pipe.


I did find it interesting that the writer thought the smaller section of the header was to help with emissions. Since I have installed my 2.5" cat and Honda 4 into 1 header my emission #'s have gone up...
I guess the system flows too well... which = low cat temps. = poor 'filtering' properties.

Will
-who likes quiet flow....

 

If you have a stock Euro header, I don't recommend just modding it like in that article. It looks like the AUS ITR header is different because the heatshield is different. The primaries of the stock Euro header are only 40 mm OD.

You can start with an JDM header + 60/63 mm testpipe (resonator type) + stock B-pipe and muffler. Just remove the first bottleneck by replacing the B-pipe flange with a 60/63 mm version....
You can always go to a full 2.5" setup later if you want that 3-4 hp extra (+ more noise).

 

Do that ASAP!!!
The idea of a restrictive header to help emissions is to keep some exhaust gasses in the cyl and burn it again in the next cycle. Like EGR= Exhaust gas recirculation.

 

Im using under axle 2.5" piping on mine no resonator and Carsound HF CAT coupled with Mugen 4-1 header and Apexi N1 Turbo universal muffler......VERY VERY loud and very free flowing.....as my car rarely see the street mainly is used for track now!

 

Does it hit at all?

Craig - Who does not like the angle of the exhaust from a under axle setup

 

who said aussie itr owners were stupid?

-Dave,

 

He's probably referring to the fact that someone undoubtedly told him his DTM/N1 style muffler was rice or gay.

But getting Spoon/Mugen/JDM parts so you can be cooler than the guy who buys APC isn't...

Reid, who doesn't understand why some people care so much about what others do to their cars as long as it doesn't hurt anyone


[Modified by Reid, 1:14 PM 5/8/2002]

 

nope it does not hit at all providing your car is not too low and for the track its not a problem as there are no speed humps on the circuit

 

we are all ITR owners in this forum and we should all respect each others decisions on how they want to modify there cars!...I have a lot of respect for owners on this board!......you and many others in this forum have been more than helpful to me and many others and this is what this forum is all about!...meeting new friends, enthusiasts and gaining specific knowledge on our cars!

Cheers!

 

DC2 - so how does your R go compared to stock. I am keen to do somemods to mine which is stock at the moment (but still hit a 14.8@90mph) but I want the mods to be streetable as wel. I am thinking of doing the exhaust mod in the autospeed article and combine it with a decent exle back.

Where in Australia can I find a hi-flow car sound cat?? I live in North Queensland so its the A$$ end of Australia in so far as performance shops go

 

I agree fully as long as Skafia stops wasting bandwidth.

You heard the man, Dave. You have no ITR so get out of our forum and leave us alone!






[Modified by Reid, 1:52 PM 5/8/2002]

 

great article...

 

 

When people say 2.5" piping does that mean OD or ID?

 

i can get your Car Sound cat, all parts of DC2#428 supplied by me. This is Jacob here