I was wondering if anyone knew what the Type R that was used for the "Great Header Test" had done to it (besides headers obviously) - thanks very much!

 

The test was done on my itr.
My mods where:
-Comptech intake and ice box
-Removed power steering belt
-Carsound cat
-Spoon oil cap-best mod ever

Just before the test was started:
-oil changed
-new plugs
-new distributor(sp) cap
I think that is it.

 

Didn't it have a SMS exhaust as well for the test?

 

Yes. Althought we did a baseline without it (stock USDM header + exhuast), and a baseline with just the exhaust (with testpipe or highflow cat.)


[Modified by sackdz, 3:25 PM 10/23/2002]

 

Okay I'm confused. On the site did you get the baseline # as well as the rest of the #'s using the SMS exhaust or stock exhaust and a test pipe or or carsound cat? Thanks!

 

We got was 100% stock (exhaust anyway) baseline, and then a run with the SMSP catback. The only time the testpipe was used was for the stock baseline, and MAYBE the comptech header, although I think Dave might have brought a 2.25" testpipe for that run.

 

here is the link http://www.automotiveperformanceengi...om/header.html

 

I agree, but don't forget the spoon wristbands for the master cylinder resovier (extra stopping distance)

 

I havnt, just orded them.. Thanks RandD

Ed. I thought that we used the carsound cat for the baseline run?

 

I am just wonder, since SMSP header is so much longer than all the other headers, how can that be bolted onto the same cat or exhaust? ie: stock exhaust, then SMSP exhaust??

 

Did you get those results of the headers on the site (with the exception of the comptech) using a carsound cat? What exhaust was used to get the dyno plots of the headers on the site?

<----------- Still confused

 

SurferX questioned the test over on Team Integra and this was my response there.

Up to the point of the test, all the Mustang dynos seemed to record lower than thhe Dyno Jets. I believe the dyno operator even made mention of this and gave some reasons why the Mustang was better than the Dyno Jet. It's my understanding that the Clayton dyno is the one that reads high, but I don't have any experience with it.

I too was surprised at the results, especially of the Comp Tech header. This header has primaries that start out smaller than the USDM DC 4-2-1.

Let me clear up the test procedure here once and for all.

-The bone stock ITR that was offered never showed up.
-One of the would be spectators offered his (canukR???)
-We then changed his oil/filter with Mobil 1, installed a new cap, rotor and spark plugs.
-The donor car had a Spoon 4-2-1 with a Godspeed test pipe. These 2 items were replaced with a stock header and a 94005 cat built by Tom Payn I believe and were bolted up to a bone stock ITR cat back.
-The car had a CAI, Comp Tech or AEM I can't remember.

-So the baseline was done with CAI and 2-1/4" cat, peak whp was 178.58. This and the following peak numbers were taken from the data file not the graph that had a smoothing function applied to the data.

-A JDM header was not used with the stock exhaust which was a big brain fart by all of us.

-The stock header, 2-1/4" cat and 2-1/2" cat back made 179.25 peak

Then the JDM headers were tested with a test pipe (cat only used in the baseline runs) and 2-1/2" cat back. Below are the peak numbers recorded after about 3 runs for each set up. We all know that peak numbers mean jack but here they are anyway.

DC JDM 187.04
ITR JDM 185.56
JUN 186.57
Comp Tech 187.19
Type One 186.22
Toda 190.04
Spoon 187.41
SMSP 190.28
MuTech 187.11
Mugen 186.34

The best dyno jet numbers I've seen on a stock ITR engine with CAI, ITR JDM header, 94006 cat and a 2-1/2" cat back were 182.4 on George Knighton's car. Which is less than all the above, even when running a test pipe. As for the test weather, we stayed between 55-60 in the shop all day from what I remember.

Bottom line is be careful in comparing one dyno graph to another, even the same brand. Because the conditions can be different and the condition of the dynos can be very different.

 

Sotck run was with a carsound? I thought I remember Matt going home to pick up his stock cat....

 

He picked up his stock header but didn't have a stock cat. We used a 2-1/4" carsound that was built by the Payn guys.