MZM ran an 11.68 at 121 Friday night.

The car is an 02 with a JDM Spec C motor, APS SR55, APS up-pipe, HKS exhaust, Cusco headers and Ecutek tuned. The car is Mohammad's daily driver.

Congratulations to all the crew at MZM!

Thats great!

Good stuff... one of the best APS dealers around.

good mph

other mods ?

Intake, injectors , fmic ?

Octane?

Man.... I'd kill to have a daily driver that is that effing fast...Especially with a trap speed like that.... It would be a monster from a roll!

I drove my own vehicle, anyway how many times must I tell Robert that my car is a 03 model. There is a difference, the illuminated key ring! MAN am I :furious: & the exhaust system is a 3.5" DR APS unit, :lol: just kidding.

The sad part is, I broke the left rear half shaft on the fourth pass right of the line as I got very acquainted with the launch. Still room for improvement on my 60FT, as my best was a 1.7811. But still was able to drive home in 50/50 mode…..

I am not a big fan of drag racing an AWD vehicle, but for some odd I feel an addiction coming along. Track is closed for the holidays, as soon as they re-open I'll be out there.

Thanks everyone! :)

The following are the mods on my vehicle:

v.8 STI spec C power plant & drive train
Spec C ECU, tuned utilizing EcuTek variable cam timing is working.
SR55, 17.5 housing.
GSS342 walbro pump.
Stock JDM fuel system except for the APS fuel rail system, Howal non-oxygenated fuel 101 octane unleaded.
APS DR650 IC.
APS CAI.
IK24 ND plugs equivalent to NGK heat range 8.
Cusco headers, wrapped.
APS up-pipe.
Profic B spec II 21 psi flat line boost all the way to 8500 RPMs

Mohammad

cool car mohammad! i too am a fan of aps' products. i wish i went with a 3.5" t-back rather than their 3", but oh well, all their priducts are terrific!

What are the gains from a 3" exhaust to 3.5"?
Why not just run downpipe out on track days? Class rules?
I thought an exhaust that big was only for cars pushing like 600 whp.
Easystreet was already in the 9's before they switched to 3.5" (iirc).

What are the gains from a 3" exhaust to 3.5"?
Why not just run downpipe out on track days? Class rules?
I thought an exhaust that big was only for cars pushing like 600 whp.
Easystreet was already in the 9's before they switched to 3.5" (iirc).
none that would make a difference

The sad part is, I broke the left rear half shaft on the fourth pass right of the line as I got very acquainted with the launch.

told ya it was a rear halfshaft ;)

11.6's nice

Nice times mohammed. Your car is a beast.

none that would make a difference

Thats my point. If the 3.5" doesnt make a difference, whats the point of having it?
And I think running downpipe out would make a difference.
No Muffler = Less Restriction
Quote from QTP's site about there electric cutout
" Gained 21 wheel horse power and 24 pounds of torque open vs closed QTEC on a stock WRX. "

If you dont think thats a difference, I would like to know what you think is a difference.

Granted on a stock WRX by using the cutout they are bypassing all the small piping, a cat, and the stock muffler so the gains would not be so much if used on a WRX with a catless 3" tbe.
But I think you would still gain a little power by taking the muffler out of the equation.

My real interest is to see some plots of a WRX with an APS 3" tbe vs the same car with the APS 3.5" tbe.
But if I look at it from a restriction standpoint I would say that there has to be a little power gain going to the 3.5".
But if you increase the diameter of your pipe you are adding surface area to dissipate the heat, which will create a greater temperature gradient in the exhaust flow and will effect the boundary layer conditions. I believe there will be more turbulent flow in this case, which could negate the gains of the less restrictive larger pipe.
Its been a while since my fluids classes and heat transfer effects so I am probably spewing sewage, but I swear I remember something about the flow being worse and there being more heat loss effects.
But it could be the same situation as txs claiming higher gains by tapering there exhaust from 3" to 2.5" because of the ideal gas law. IIRC, that exhaust never made as much power as a full 3".
I would think the only way to test/prove this would be with dyno tests of the same car with both exhausts.
I probably should have done this first, but I'm gonna go check out the aps site to see if they have any info.

thanks
ron

Just saw this on there site.

"The worlds first bolt-on 3.5" Stainless Steel (304) turbo to tip race exhaust designed for 600+ horsepower. Minimal exhaust back pressure, fast turbocharger spool-up and maximum horsepower is guaranteed."

I guess if they are talking flywheel horsepower you are almost there.

And if you want minimal back pressure, wouldnt running downpipe out be the best way to achieve it?

SAR is holding another Import Shootout Friday, 1/14. Any interest? I know of at least a few EVOs that plan on going and I hear MZM will there in their WRX.

great news!!!

i go sr55 next week.....

cannot wait!! (also have the APS CAI and 3"TBE, catls)

SAR is holding another Import Shootout Friday, 1/14. Any interest?
I'll be there. :cool:

Does anyone know why Mohammad uses a boost controller with that setup? I thought the ECUTEK could be tuned to the desired boost level for whatever application you would like..ie...drag. Is this not the case, or is the Profec applied at the 21psi just for racing?

Does anyone know why Mohammad uses a boost controller with that setup? I thought the ECUTEK could be tuned to the desired boost level for whatever application you would like..ie...drag. Is this not the case, or is the Profec applied at the 21psi just for racing?

I was wondering the same. I am getting my car tuned with ECUTEK at Dyno Comp and Rich said I didnt need a boost controller.

I think stock selonoid is not good enough at high boost levels with the bigger turbos.

The worlds first bolt-on 3.5" Stainless Steel (304) turbo to tip
I think that they are mistaken in regards about worlds first. I have had on my STI for over a year 3.5 turbo back with 4 inch tip made by Ultimate Racing.

Rui

HondaHata:

The spec II has been on the car for about a year now, the SR55 & track event was a spontaneous thing as I never have time to work on my own vehicle, to achieve that kind of boost pressure with my SR55 combo pack it would have taken quite some value changes over the stock parameters. With the spec II which I am very familiar with, I can hit on the nail within the first try of setting the boost controller values. The EcuTek technology is extremely powerful as it gives the tuner control over the stock solenoid parameters, from duty cycle, & such features as boost Vs. speed Vs. IAT temps & much more! Basically full control of the stock ECU parameters..

Joey:

Don’t get me wrong if your turbo is stock or slightly larger, why spend the money on an external unit as Richard @ Dyno comp is correct. You are in good hands if your taking it to him for tuning.

:)

Mohammad

told ya it was a rear halfshaft ;)

Thanks.

Took the one off our house car! :D

Started thinking, maybe I should get a head start on this issue as our 2.74L 04 STI house car would blow my street car away in respect to HP/TQ figures.

Shipped the axles off to get replaced with 300M shafts & have them readily available for customers who have this issues.


Mohammad

what I want to know is if a usdm sti with our 7k redline and that setup could pull off that trap speed?

what I want to know is if a usdm sti with our 7k redline and that setup could pull off that trap speed?
Yup, going by my calculation, at 8500rpms and 21psi, he is pushing around 619cfm. A 2.5L@7000rpms and 21psi is 637cfm, so you can easily push the same amount of air at even a lower rpm. Of course, he is using the Spec C setup which is going to have a much better VE with large ports, cams, etc.

Thanks Mohammed for the answer about the EBC. Are you all seeing the fuel rails as being a necessary part of the turbo upgrade----or are the stock rails(with upgraded injectors of course) enough to do the job. I hope this question is not out of forum?
My apologies if it is.

Thanks.

Took the one off our house car! :D

Started thinking, maybe I should get a head start on this issue as our 2.74L 04 STI house car would blow my street car away in respect to HP/TQ figures.

Shipped the axles off to get replaced with 300M shafts & have them readily available for customers who have this issues.


Mohammad

Where can I get these 300M axles from?

Hey Andreas, don't know what Mohammad is going to say, but try www.driveshaftshop.com

Good work Mohammed.

I myself is going from a EJ20R w/AVCS to a 2.5L Short Block next year w/ a SR50 or SR55, boosting up to 15psi.

Look forward to seeing lower numbers from you in 2005.

Thats my point. If the 3.5" doesnt make a difference, whats the point of having it?
And I think running downpipe out would make a difference.
No Muffler = Less Restriction
Quote from QTP's site about there electric cutout
" Gained 21 wheel horse power and 24 pounds of torque open vs closed QTEC on a stock WRX. "

If you dont think thats a difference, I would like to know what you think is a difference.

Granted on a stock WRX by using the cutout they are bypassing all the small piping, a cat, and the stock muffler so the gains would not be so much if used on a WRX with a catless 3" tbe.
But I think you would still gain a little power by taking the muffler out of the equation.

My real interest is to see some plots of a WRX with an APS 3" tbe vs the same car with the APS 3.5" tbe.
But if I look at it from a restriction standpoint I would say that there has to be a little power gain going to the 3.5".
But if you increase the diameter of your pipe you are adding surface area to dissipate the heat, which will create a greater temperature gradient in the exhaust flow and will effect the boundary layer conditions. I believe there will be more turbulent flow in this case, which could negate the gains of the less restrictive larger pipe.
Its been a while since my fluids classes and heat transfer effects so I am probably spewing sewage, but I swear I remember something about the flow being worse and there being more heat loss effects.
But it could be the same situation as txs claiming higher gains by tapering there exhaust from 3" to 2.5" because of the ideal gas law. IIRC, that exhaust never made as much power as a full 3".
I would think the only way to test/prove this would be with dyno tests of the same car with both exhausts.
I probably should have done this first, but I'm gonna go check out the aps site to see if they have any info.

thanks
ron

He probably bought the 3.5 for head room in the future. Maybe a fully built 2.2-2.5 is in his future plans?

He did state 2.74L, which is the same 2.8L from Crawford, which is a beast.

And still, i-speed and crawford would not release any videos on that car like how you see with the Supras and Skylines.

What Turbo Is On That 2.8 Beast.....

What Turbo Is On That 2.8 Beast.....
I think they have an SR65 planned for the 2.7. Mohammad's car that ran the 11 sec pass has the SR55.