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Old 07-03-2008, 02:30 PM   #1
Badazzcr
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Default TopSpeed Time Attack car dyno'd @ Cobb Tuning in SLC

Just got back to the office so I figured I would take some time to post up our time attack cars dyno graph. This was done on Cobb Tuning's Mustang dyno, which has been notorious for being very unforgiving. IIRC their on track facility is around 4300ft above sea level which doesn't help eighter.

Runs were made on Q16, as you can see from the boost we hit a peak of 26psi which held flat until 5500rpms. At which point the boost fell to around 23psi at redline.

We made 528hp and 501tq, this was done before the time attack so we never really pushed it on the dyno as to save the car. But we have run it higher than 26psi in full race trim.

One thing I would like to you to notice is the overall powerband of the car, notice how we are making 20psi at 3700rpms. Also notice how we make 350tq at 3500rpms. Then 26psi by 4000rpms, oh and don't forget we make peak hp right before redline. Its by having the proper combination of parts that we have developed and tested that were able to achieve such an awesome powerband. I doubt you will ever find such a broad gt35r turbo power band on a suby.

Lastly I wanted to thank COBB Tuning for help us out. Is always a pleasure to deal with you guys when we are in SLC. Truly a class act!!!
528hp 501tq

528hp 501tq


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Old 07-03-2008, 02:41 PM   #2
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wow, that's a nice graph! I love that car. Any pics of the intake manifold?
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Old 07-03-2008, 03:11 PM   #3
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that is quite a pretty tq curve, especially for a turbo car!!

:tips hat:
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Old 07-03-2008, 03:16 PM   #4
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What cams? Big port heads?
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Old 07-03-2008, 03:32 PM   #5
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GSC S2 cams, and our ported race heads.
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Old 07-03-2008, 04:03 PM   #6
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<Wants ride including fourth gear full throttle.
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Old 07-03-2008, 04:05 PM   #7
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Nice. I met you guys out at the track on the 26th. (I am the guy who makes the splitters with the 06 that had a bad exhaust leak) I love your car and you have inspired me to build a full race car for next year. To eleminate beating the DD. Love the set up you guys have done!
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Old 07-03-2008, 04:18 PM   #8
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You guys really only run it out to 7000rpm though?

Isnt the reason most fully built gt35R setups hit peak hp earlier than redline because their redline is 8500-9000rpm?

The low end is amazing....looks like my FP Green boost graph only with 100hp/tq more.

I also appreciate the way your engine bay is setup. Finally someone put all the cold charge piping as far away from the exhaust as possible.

I've always wondered if the reverse scoops actually work the way people think they do. Have you guys ever taped string all around the exit of the reverse scoop to see what the air is doing there? Im curious if the reverse scoop is still "sucking" in air or if the air is actually coming through the grill and out the scoop. Some really interesting aero going on there with boundary layers, underhood aero, and how they all interact.
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Old 07-03-2008, 04:19 PM   #9
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sexy.
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Old 07-03-2008, 05:25 PM   #10
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no doubt it is a very stout powerband and to be praised. But I have seen one almost as broad, on a street car.

http://www.iwsti.com/forums/engine-p...ut-5-24-a.html

twinscroll 35r, they're making 300 wtq by 32-3300 rpm and 330ish wtq by 3500 rpm

I'm not posting this to steal your "thunder" or start a flame war, but to refute the point you made about not seeing this kind of powerband on another subie.
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Old 07-03-2008, 06:56 PM   #11
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Quote:
Originally Posted by Illusive View Post
no doubt it is a very stout powerband and to be praised. But I have seen one almost as broad, on a street car.

http://www.iwsti.com/forums/engine-p...ut-5-24-a.html

twinscroll 35r, they're making 300 wtq by 32-3300 rpm and 330ish wtq by 3500 rpm

I'm not posting this to steal your "thunder" or start a flame war, but to refute the point you made about not seeing this kind of powerband on another subie.
pretty cool graph, we still make more tq faster and hold it longer. Not to mention that on Cobb's Mustang dyno that car would most likely put down around 460hp. Still a wicked power band though.
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Old 07-03-2008, 07:03 PM   #12
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Quote:
Originally Posted by Phatron View Post
You guys really only run it out to 7000rpm though?

Isnt the reason most fully built gt35R setups hit peak hp earlier than redline because their redline is 8500-9000rpm?

The low end is amazing....looks like my FP Green boost graph only with 100hp/tq more.

I also appreciate the way your engine bay is setup. Finally someone put all the cold charge piping as far away from the exhaust as possible.

I've always wondered if the reverse scoops actually work the way people think they do. Have you guys ever taped string all around the exit of the reverse scoop to see what the air is doing there? Im curious if the reverse scoop is still "sucking" in air or if the air is actually coming through the grill and out the scoop. Some really interesting aero going on there with boundary layers, underhood aero, and how they all interact.
Acutally we set the rev limit to 7500rpms while road racing. We could spin the motor higher than 7500rpms but choose not to. Our engine package will actually make peak power right before 7500rpms.

For the dyno we just decided to have it stop a few hundred rpms before our rev limit because I didn't want to bounce it off the limiter. Had we adjusted the dyno to read all the way up I am sure it would have made a few more hp on the graph.

Short answer is there is no need for us to rev the engine any higher with the current power band. We have spun it as high as 8500rpms, and all seemed fine but why not build a motor that could safely spin 8500. Then turn it down to 7500 and make it last a long time.
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Old 07-03-2008, 07:53 PM   #13
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I wish I could have a motor like that.
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Old 07-03-2008, 11:47 PM   #14
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Damn I got tuned on friday out there and was happy with 360 on that dyno.Now I need to build a motor this winter 500 sounds alot better that 360.It was nice meeting you Doug and talking to you while john tuned my car.Hope to see you guys next year coolest car out there.
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Old 07-04-2008, 02:44 AM   #15
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Quote:
Originally Posted by Badazzcr View Post
Acutally we set the rev limit to 7500rpms while road racing. We could spin the motor higher than 7500rpms but choose not to. Our engine package will actually make peak power right before 7500rpms.
i totally agree with your stance and approach, any chance of you guys doing a lap with the scoop closed off and measuring underhood temps, then doing it with it open?
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Old 07-04-2008, 06:53 AM   #16
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do you have a build list on this car anywhere?

what turbo are you running?
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Old 07-04-2008, 07:02 AM   #17
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Quote:
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I wish I could have a motor like that.
You can. Call Topspeed and order the RR1 package.....wait a min you have already havent you?
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Old 07-04-2008, 07:38 AM   #18
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Quote:
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You can. Call Topspeed and order the RR1 package.....wait a min you have already havent you?
RR2- coming in July. More to follow.
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Old 07-04-2008, 08:50 AM   #19
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any info on the suspension setup?
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Old 07-04-2008, 10:14 AM   #20
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Quote:
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any info on the suspension setup?
Whiteline front and rear bars, anti lift kit, lateral link, and roll center kit. JRZ 3ways with custom spring rates.
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Old 07-04-2008, 10:38 AM   #21
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looks great! thats a mean set-up. Id love to get a ride in that
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Old 07-04-2008, 02:46 PM   #22
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How much does the car weigh? If I may ask.
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Old 07-04-2008, 02:55 PM   #23
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Phatron, the leading edge of the scope is designed to produce a low pressure area over the opening behind it. Which I'm sure you are aware of, but it's worth mentioning for others. The lower edge of the windshield is a high pressure area due to the low velocity boundary layer that forms there as the air is accelerated over the top of the car.

Unless the cowl seal is removed and the back of the hood is jacked up, I don't see it creating an eddy of airflow from the opening to the cowl and into the engine bay. Which it looks like it might be?

I agree, could be an interesting combination of aerodynamics going on right there. String would definitely be revealing.
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Old 07-04-2008, 06:14 PM   #24
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That's an amazing torque curve...simply amazing. I have to concur - there is nothing to be gained by spinning it up any higher in the rpm band.

Stock gear set and ratios?
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Old 07-04-2008, 08:28 PM   #25
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is it just a stanard trim 35r?


still looking for a build sheet
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