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Forced Induction Forum Sponsored by Active Autowerke
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Old 04-21-2012, 12:46 PM   #761
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If you watch the video of that pass closely you can see that they ran 9.39! We ran 9.35 !! LOL And they have mysteriously never been able to post the time slip...... hmmm
You mean this run??

http://my350z.com/forum/forced-induc...-34-video.html
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Old 04-21-2012, 12:54 PM   #762
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Larry your trap shoulda been a high 8s run. Too bad that black beast is retired. woulda loved to see it run with the twin 67s

MArcus, do you plan on sending your car back to AZ for additional work after Mfest or are you taking possession of it to enjoy for the time being?
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Old 04-21-2012, 12:55 PM   #763
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Yes, here is the video:



You can clearly see that it was a 9.39 but somehow they said it was 9.34 because we went 9.35.... and they lost the timeslip??

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Old 04-21-2012, 12:56 PM   #764
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So back to Marcus.... Congrats on finally getting the car running as it should!!
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Old 04-21-2012, 01:12 PM   #765
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which one? There are quite a few variations of the gt42r. Precision does sell gt42s as well as gt42 frame turbos with their billet wheels in them.
gt4294r
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Old 04-21-2012, 01:17 PM   #766
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gt4294r


Precision does sell it but for a few bucks more you can get the same frame turbo with a Precision billet 71wheel (GT4294 is a 70.3 mm cast style compressor wheel) that will out spool the 4294 and make a ton more HP!
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Old 04-21-2012, 01:57 PM   #767
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Nice times Marcus! That trap is ! Did you make any passes behind the wheel?
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Old 04-21-2012, 04:16 PM   #768
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Looking good! I can't wait for my SAAD kit to come
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Old 04-21-2012, 07:13 PM   #769
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Has the rev limiter been raised?
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Old 04-21-2012, 07:51 PM   #770
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Has the rev limiter been raised?
Its possible. But they have not mentioned it, nor did it show up in the dyno sheets.
Every winning tuner is entitled to keep some secrets, too!

My question, should they want to share...
what is involved in fitting a 17 inch front wheel and skinny? What wheel, what tire? Do the Brembos have to be taken into consideration?
What about spacer mounts and or adapter mounts.
Doing this on a Corvette can be a big expensive deal with custom spacers and adapters. Some like to use the SPARE wheel off a Pontiac GTO...super light, cheep etc. But it needs all sorts of adapters and spacers.

They say running skinnies only picks up a very small amount of time...so what about running a normal 7 or 8 inch wide 17inch rim? The PROBLEM is finding BIAS PLY tires in the right size/ Bias plys are a niche tire.

Its not cheap to commit to run 16 inch Street ET's. I would love to see what all is involved. Taking care of the rear is just the start!

Marcus, do you mind?
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Old 04-21-2012, 07:56 PM   #771
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Totally pedaling it out of the hole!!!
"Pedalling" means lifting throttle in reaction to wheelspin in gear and then reapplying throttle when resuming traction.

I think you mean it was a soft launch? The 60' time on the slip will show! It looked like a decent hit to me under antilag for the car's limitations (IRS, unibody, tiny radial tires).
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Old 04-21-2012, 08:23 PM   #772
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"Pedalling" means lifting throttle in reaction to wheelspin in gear and then reapplying throttle when resuming traction.

I think you mean it was a soft launch? The 60' time on the slip will show! It looked like a decent hit to me under antilag for the car's limitations (IRS, unibody, tiny radial tires).
The car was not on tiny radials, but medium/large bias ply cheater slicks
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Old 04-21-2012, 08:29 PM   #773
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"Pedalling" means lifting throttle in reaction to wheelspin in gear and then reapplying throttle when resuming traction.

I think you mean it was a soft launch? The 60' time on the slip will show! It looked like a decent hit to me under antilag for the car's limitations (IRS, unibody, tiny radial tires).
You can hear Saad letting of the throttle out of the hole. My assumption is he is trying to limit the stress on the driveshaft and rear end.
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Old 04-21-2012, 08:30 PM   #774
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Totally! Put the car on a better prepped track and low 10's/high 9's are there for sure
I disagree on both points.
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Old 04-21-2012, 08:31 PM   #775
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You can hear Saad letting of the throttle out of the hole. My assumption is he is trying to limit the stress on the driveshaft and rear end.
I disagree with this as well.
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Old 04-21-2012, 08:36 PM   #776
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I disagree with this as well.
And your thoughts are......
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Old 04-21-2012, 08:41 PM   #777
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I disagree with this as well.
+1

If he let of the throttle car would bog down and launch would be messed up,what you hear is ProEFI traction control doing its job,I might be wrong but just my .02
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Old 04-21-2012, 08:58 PM   #778
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and your thoughts are......
way beyond my pay grade!
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Old 04-21-2012, 09:20 PM   #779
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And your thoughts are......
#1: Very very good driving. I think most people don't understand the skill involved in those first 100 feet.

I don't think Saad was trying to limit the stress on the car's launch. The fact that it spun the tires and he had to peddle it is proof. I've run very similar tires on a totally unprepared track and had no issue running 1.7s. My guess is that with a little less launch RPM, the car would have actually launched a bit better. Not optimal, but better in the 60 with "less" tire spin. I don't think there's any way around it spinning in first with so much torque and a "green" track. My point is that it might have rolled out a bit further before it spun, that's all.

The second "peddle" off the line is a gearshift.

Regarding a better prep'd track on it's own improving the ET: It brings it's own set of problems that don't always make a car faster. I've seen cars struggle to launch with perfect traction causing bogging issues...and then breakage when the driver launched harder. Not everyone has a clutch that you can slip off the line. I think if you have better conditions, it can help, but it's not always that simple. Sometimes the launch strategy that would be optimal in those conditions isn't mechanically feasible.

The really cool thing though is that Marcus has data from this run. I would be really interested to see what it looks like.
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Old 04-21-2012, 09:27 PM   #780
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Congrats to Marcus, Proefi and Saad. Well done the car is amazing.
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