obd2gsr

thanks for the comparisons.

mafay2

So what you are saying is that any intake test on a dyno is totally pointless?

jdmspoonitr

iTrader: (1)

Not completely pointless. It will of course show a difference between a highly restrictive system and a free flowing one. But with similar cold air intake designs it takes real world acceleration and speed forcing air into the horn of the intake for the testing to be accurate.

Yes of course you will see some changes on a dyno from intake to intake, but they are not an accurate representation of how much power the car is actually making while in motion.

Ch33se

Why would air flow make any difference anyhow. Correct me if I'm worng BUT dont the bottom of the intake point in a upword direction? Not all the way upwards but still BEHIND the bumper and no wind is directly flowing into the cai b/c its behind the bumper?

Downey

before,


after..

B2FiNiTY

iTrader: (2)

Maybe you should try the comptech intake arm with the mugen intake and see if there is any slight difference. Just curious.

Jack Black

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jond &raquo;</TD></TR><TR><TD CLASS="quote">Thanks for the review
How much does a Hytech Renault cat go for?</TD></TR></TABLE>

Gabe_

What filter was being used in the stock airbox?

Also, was the "stock" airbox stock? Or was it modified?

Austin

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Gabe_ &raquo;</TD></TR><TR><TD CLASS="quote">What filter was being used in the stock airbox?

Also, was the "stock" airbox stock? Or was it modified?</TD></TR></TABLE>

Stock as stock can be.

EMI

how do you like your hytech header and exhaust? I was planning on getting their turbo manifold

Austin

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Agent Smith &raquo;</TD></TR><TR><TD CLASS="quote">
jondThanks for the review
How much does a Hytech Renault cat go for?</TD></TR></TABLE>


Sorry for not answering this before, John at HyTech told me that they are $295, I paid for part of the cat when I bought the exhaust a year ago, and finally got around to sending my test pipe back to John so that he could make a cat that's the right size for me, so I paid a slightly different dollar figure.

Austin

Austin

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EMI &raquo;</TD></TR><TR><TD CLASS="quote">how do you like your hytech header and exhaust? I was planning on getting their turbo manifold</TD></TR></TABLE>

I love it, but then again if you do a search on HyTech I'm sure that you'll find numerous threads that I've posted.

Calavera

what kind of coating is that on the header?

Austin

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Calavera &raquo;</TD></TR><TR><TD CLASS="quote">what kind of coating is that on the header?</TD></TR></TABLE>

HP Coatings http://www.hpcoatings.com I have their Xtreme coating on the header.

Austin

Mike M

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cheap Bastard &raquo;</TD></TR><TR><TD CLASS="quote">i guess the extra $$$ for the mugen intake fools the butt dyno.</TD></TR></TABLE>

Keep in mind that Austin's car has ALOT of tuning done to it and its not the average ITR with some Bolt ons. The Amount his Stock ITR Head can flow might be a factor in why there was a little increase with the Mugen intake.

In My own test and a dyno done by White Dragon (Wes) the Mugen Intake showed about a 7-9 hp increase at the wheels. My Test done on a mostly stock ITR other than a Mugen header and Exhaust.

Cheap Bastard

I don't follow the logic. Stock motor gains power, because flow is limited by the stock air box. But mod motor not limited by the air box, but at the head? Shouldn't the bottle remain at the air box?

I would think if the bottle neck is at the air box then gains should be even greater on a modified motor.

RacerZook

iTrader: (1)

here's a question for you: If, in fact, the intake does make more power when the car is moving, is it possible that the engine could be running lean during operation? Basically what I'm asking is, could the engine be behaving differently than what the dyno readout is showing?

Austin

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RacerZook &raquo;</TD></TR><TR><TD CLASS="quote">here's a question for you: If, in fact, the intake does make more power when the car is moving, is it possible that the engine could be running lean during operation? Basically what I'm asking is, could the engine be behaving differently than what the dyno readout is showing?</TD></TR></TABLE>

Yes, which is why you have to be careful when you're tuning your motor on the dyno, as the real world results will vary with air temp, humidity, and air flow. I was running a lean 14.1:1(leaner on the drag strip), and now I'm running a 13.7:1, with the cat I'm running ~13.2, I really didn't pay attention to the A/F ratio with the cat installed, if I had I would of had Lawrence lean out the mixture, which would have resulted in additional power(hopefully).

Austin

Pompiuses

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Austin &raquo;</TD></TR><TR><TD CLASS="quote">
Yes, which is why you have to be careful when you're tuning your motor on the dyno, as the real world results will vary with air temp, humidity, and air flow. I was running a lean 14.1:1(leaner on the drag strip), and now I'm running a 13.7:1, with the cat I'm running ~13.2, I really didn't pay attention to the A/F ratio with the cat installed, if I had I would of had Lawrence lean out the mixture, which would have resulted in additional power(hopefully).
Austin</TD></TR></TABLE>

This is a little off topic, but do you have any idea of how much leaner the engine will run as temperature drops?

Eva01

Nice Test. Appreciate the time and effort Austin!

rodimus

possibly the difference while driving it was throttle response?

Austin

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

This is a little off topic, but do you have any idea of how much leaner the engine will run as temperature drops?</TD></TR></TABLE>

I really don't know the answer to that question, the ECU adds/removes fuel dependent upon the air temp, water temp, altitude, and a few other factors...I'd have to do a fair amount of research to come close to a guess.

Austin