SMSP

Last night, late last night I was at the Ultimate shop in Sterling, VA.

We did some dyno testing on Jason Hunt's B20VTEC. I brought my 1 Piece Mild Steel header (same design as one of the 2 SMSP headers tested this past weekend by vteckidd and johnzm) and I had a DTR 2L stainless header that H-T member EVOL loaned to me for testing.

The graph below of the Weapon R header was done in March. The only difference in last night's set up and March's was the addition of an air horn from IB on the end of my custom short ram intake tube, so we can assume that the 2 headers tested last night may have had a little edge. I know that we should have tested the Weapon R also to make it fair, but it had to be removed and 3 of the primaries rewelded due to cracking plus some cracking at the secondaries. By the time we were finished reinstalling the Weapon R header it was 1:30 in the morning and we called it a night.

So below is last night's run of the DTR 2L versus last month's run of the Weapon R. I will post my 1 Piece versus the DTR 2L after Jason Hunt sends me the file, for some reason run viewer can't open the drf file of my header.



FYI, the DTR 2L header has bigger primaries and secondaries than the Weapon R header.

BTW, Jason Hunt tuned this car with the WeaponR header (cam gears, timing, etc.) to run on pump gas. He and Jason Hereria (I'm sure I butchered the spelling...sorry) tuned the car last night. There was no timing or cam gear changes made, only fuel. They tried to get the A/F ration between 12.5:1 and 13:1 across the board for both headers.

The engine is a 85x89 with a ported ITR IM, larger TB and Toda Cs.

A big thanks to both Jason and Jason for doing the test and tuning.


Update 9:27pm 4/25/05

Here's the graph of my 1 piece mild steel header vs the 2L DTR stainless header.




All 3 headers




Modified by SMSP at 10:28 PM 4/25/2005

DIFFUT'S INC.

iTrader: (-1)

nice power from DTR now lets see how they do on the other test

kadburry

nice!

rodimus

YES!

edit: the DTR was a custom made header for a 2020cc's engine also, it is NOT a side exit header.

johnzm

i cant wait to retest these headers with a stronger engine.

from the looks of that dyno, there could be big differences between headers on a built motor!

D-tuned

nice

rodimus

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by johnzm &raquo;</TD></TR><TR><TD CLASS="quote">i cant wait to retest these headers with a stronger engine.

from the looks of that dyno, there could be big differences between headers on a built motor!</TD></TR></TABLE>

by all means necessary, do it

i keep telling dave i don't need my header back anytime soon..just eventually

SMSP

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by johnzm &raquo;</TD></TR><TR><TD CLASS="quote">i cant wait to retest these headers with a stronger engine.

from the looks of that dyno, there could be big differences between headers on a built motor!</TD></TR></TABLE>

The DTR header is a different design than what you tested this past weekend, i.e. tube layout, diameter and maybe length.

b19coupe

Nice test. What happened ~ 5800-6800 with the DTR?

rodimus

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b19coupe &raquo;</TD></TR><TR><TD CLASS="quote">Nice test. What happened ~ 5800-6800 with the DTR?</TD></TR></TABLE>

haha i asked the same ****..he said it was just the nature of the beast? maybe since the cam gears weren't touched i dunno

SMSP

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b19coupe &raquo;</TD></TR><TR><TD CLASS="quote">Nice test. What happened ~ 5800-6800 with the DTR?</TD></TR></TABLE>

Todd,

Remember Jason^2 didn't change cam gears or timing. This engine has a CR of about 12.8:1 and runs on pump gas.

UncleD

iTrader: (2)

b19coupe

I experienced a similar dip or flat spot on my ITR with Skunk2 cams when I switched from the JDM header to a big tube Hytech. I can post the graph later; we could not tune it out.

lifendet

nice test

hybridcivicex

cant wait to see more ino

SMSP

Talked with Jason Hunt a little bit ago and he will email me the files later. But he is just a tab bit busy in that shop lately.

I should be dynoing the 1 piece on a fully built 1.8 tomorrow if the stars stay aligned. So expect some more graphs.


Modified by SMSP at 11:22 AM 4/21/2005

Kendall

Isn't the particular design of the Weapon R for a 1.8?

six sigma racing

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

haha i asked the same ****..he said it was just the nature of the beast? maybe since the cam gears weren't touched i dunno</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b19coupe &raquo;</TD></TR><TR><TD CLASS="quote">Nice test. What happened ~ 5800-6800 with the DTR?</TD></TR></TABLE>

This header was made for my little brothers stroker motor about 9 months back..displacement 2.1 L demensions was a 92x85.5...


Modified by DTR-FAB at 9:52 AM 4/21/2005

SMSP

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kendall &raquo;</TD></TR><TR><TD CLASS="quote">Isn't the particular design of the Weapon R for a 1.8?</TD></TR></TABLE>

Yes, I believe it is. But just like a Toda, JDM DC, ITR JDM, etc. guys will run off the shelf headers on engines other than 1.8Ls.

camp1320.com

Yeah its kinda unfair that you did the testing on the other headers only cus i heard that the IB air horn makes about 20hp to the wheels you should have make one more pass with the IB air horns on the weapon-R headers. and to weapon-R headers 2 years ago they are just hard core ricers...still are but those headers made them famous cus your subject/topic makes it seem like it was a full test between both headers

SMSP

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by camp1320.com &raquo;</TD></TR><TR><TD CLASS="quote">Yeah its kinda unfair that you did the testing on the other headers only cus i heard that the IB air horn makes about 20hp to the wheels you should have make one more pass with the IB air horns on the weapon-R headers. and to weapon-R headers 2 years ago they are just hard core ricers...still are but those headers made them famous cus your subject/topic makes it seem like it was a full test between both headers</TD></TR></TABLE>

Maybe if Jason sees this he can send me another graph. The last run we made with the DTR we replaced my intake tube with the IB air horn on it with Jason's AEM and we lost about 4-5 whp. However, I hate to dyno test intake tubes on a chassis dyno when you can't simulate the air pressure that is seen at the tube inlet. It would be nice if we had an airbox that could be pressurized to simulate different speeds.



Well we tested against the Weapon R because Jason (car owner) had bought one and that's what he was running. I really don't want to speak for him but his header has about 5k miles on it and it's been off a couple times to be fixed due to cracks. The Weapon R is an obvious copy of the HyTech header and since HyTech has a patent on that design, Weapon R can no longer produce and sell the header. Which is good for hytech. Sometimes lawyers earn their fees and sometimes they don't.

sheepey

im in.... i cant wait for these numbers by smsp...the more i see smsp the more i think about buyin one..

b19coupe

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DTR-FAB &raquo;</TD></TR><TR><TD CLASS="quote">This header was made for my little brothers stroker motor about 9 months back..displacement 2.1 L demensions was a 92x85.5.</TD></TR></TABLE>
Too much header for the motor?
I had similar results. The big tube Hytech had a big torque dip between 6100 & 8,000 rpm on my basically stock ITR engine, but no such dip on my 87.2 x 85mm motor, or on my 92 x 86mm motor.
On the ITR motor, the big header also made about 10 more peak hp and carried the power higher.

thebigone05

Dave everything is set-up for tomorrow @ 11am!! I will cover the dyno fees as well as lunch!!

SMSP

Great!

But the least I can do is buy lunch.