92TypeR

First of all, I would like to thank Dave @ R&D Motorsports and Ben @ A&J Racing for following through with this exhaust system, I have been putting pressure on them for the last 6 months to make a large diameter exhaust for N/A applications, and they came through big.

I have been running the second-gen T1R 65mm catback since '03 when they first arrived, and have been a fan of T1R products since. At the time, it was one of the only 65mm systems w/o bottlenecks. Plus it sounded wicked and made excellent gains. ( Old Dyno comparison thread Stock ITR vs JDM 4-1 & T1R https://honda-tech.com/zerothread?id=659143 )

There have been a few debates on exhaust size for built N/A motors, mainly is 2.5" too small or is 3" too big...so I figure somewhere inbetween should be a happy medium (70mm = 2.75").

The problem with most 3" systems is that any resonators added compromise ground clearance, so many do not have any resonators at all...the 70mm is just about as large as you can get with a resonator without 'dragging' the B-pipe so to speak. For us N/A guys who want to keep a resonator (or two), this unit is it.

Here is a ground clearance shot:



I decided to do another unbiased test. I hopped on the rollers and did 4 baseline pulls, swapped catbacks and did 5 pulls with the 70mm. The following graph is the best baseline versus the best 70mm.



Pictures of the system pre-install. The system includes a 70mm T1R resonated testpipe as well!



Inner Diameter:




And finally, here is a sound bit of the 70mm idle and free-revv. *note* I did not have the T1R resonated testpipe on.

http://www.itrspec.com/PICS/T1R/T1Raudio.wma

FAST4DR

iTrader: (2)

Thank you Marshall for your write up!!! I'm interested to see more plots after some tuning is done.

AJ PwR

Same here

xDicktonesx

god damn it, its so hard to get a nice exhaust for an EF without making your own.

doood

iTrader: (1)

that thing sounds nice

Furyof4

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xDEFTONESx &raquo;</TD></TR><TR><TD CLASS="quote">god damn it, its so hard to get a nice exhaust for an EF without making your own.</TD></TR></TABLE>

x2

Although I like this idea--&gt;http://www.redshiftmotorsports...t=102





Redshift Motorsports

UncleD

iTrader: (2)

Thankyou for the info 92! Is it just the angle of the picture, or does the new design have a slash cut on the tip??

92TypeR

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clean rice &raquo;</TD></TR><TR><TD CLASS="quote">Thankyou for the info 92! Is it just the angle of the picture, or does the new design have a slash cut on the tip??</TD></TR></TABLE>

It does have an angled cut at the tip. My old 65mm does not.

GSRCRXsi

lot of good it does the EF guys

someone needs to step up and make a good exhaust (custom asside) for the crx/civic EF chassis. the only thing bigger then 2.25" (or 60mm, SLIGHTY bigger) is the thermal 3". a 70mm system would be really sweet.

92, tell them to make a crx/civic version

goforbroke

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Furyof4 &raquo;</TD></TR><TR><TD CLASS="quote">

x2

Although I like this idea--&gt;http://www.redshiftmotorsports...t=102





Redshift Motorsports </TD></TR></TABLE>

WTF I didn't know this, I used to work their. I'm going to have to give that bastard friend of mine a call, he's been holding out one me. Yes fellows its very difficult trying to find a decent exhaust for a EF.

ekans

great write up!!!!what kind of header you running, and where can i find a T1R catback new? thanks.

JDogg

put a 3inch on it and i will guarentee you'll pick up more power

an2ny888

any butt dyno feedback? is the difference between the two systems apparent on the street?

92TypeR

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ekans &raquo;</TD></TR><TR><TD CLASS="quote">great write up!!!!what kind of header you running, and where can i find a T1R catback new? thanks.</TD></TR></TABLE>

Comptech Race header.

The first two responses were from the two distributors. PM them.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by an2ny888 &raquo;</TD></TR><TR><TD CLASS="quote">any butt dyno feedback? is the difference between the two systems apparent on the street?</TD></TR></TABLE>

Has rained 12" in the last 15 days, havn't had much of a chance to enjoy the car

JDM Like Whoa

I am gonna have to order one of these!

erikiksaz1

You posted the best two runs from both catbacks, but what were the average numbers? Were they much different?

JDM_teh_WIN!!

So this exhaust is set up for an Integra with a JDM spec header correct? The test pipe is the length of a stock ITR cat? Cause I have a civic coupe with a JDM header and Omni Power test pipe and I would love to run this exhaust. How long is the test pipe? 16in? My test pipe is 19in. to fit up to the USDM ITR B-pipe and JDM ITR header. If you could make one like that it would be super cool. Thanx

92TypeR

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM_teh_WIN!! &raquo;</TD></TR><TR><TD CLASS="quote">So this exhaust is set up for an Integra with a JDM spec header correct? The test pipe is the length of a stock ITR cat? Cause I have a civic coupe with a JDM header and Omni Power test pipe and I would love to run this exhaust. How long is the test pipe? 16in? My test pipe is 19in. to fit up to the USDM ITR B-pipe and JDM ITR header. If you could make one like that it would be super cool. Thanx</TD></TR></TABLE>

The setup is meant to bolt up to an Integra w/a JDM length header w/JDM sized donut, yes.

drive4aliving

iTrader: (1)

so the 70mm is officially out and u made 4 hp over the 63mm version?

JDM_teh_WIN!!

Yeah I was wondering if you ever thought about making a test pipe for a civic with an ITR exhaust. The cats a are different by about 3in I guess. Prolly due to the length of the car I would assume. Can you tell me the length of the test pipe? Every thing else bolts up fine. Thanx

chadmasterc

I wanna hear a soundclip of that redshift exhaust for the Ef. i doubt it sounds as nice as my invidia though.

GSRCRXsi

still wanting an EF version...

C1CRX

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSRCRXsi &raquo;</TD></TR><TR><TD CLASS="quote">still wanting an EF version...</TD></TR></TABLE>

UltimX

iTrader: (1)

t1r is making a ef exhaust?

GSRCRXsi

doubt it, we always get screwed