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The tale of two 951's (Dyno parameters need some help)

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Old 10-27-2010 | 11:44 AM
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Default The tale of two 951's (Dyno parameters need some help)

I am about to run both of my cars on the same dyno using the same parameters, rpm, gear duration, boost etc.

One car is an unmodified stock 89 (except autothority chip).

Other is completly rebuit with mods, Vitesse S2R etc.

Since I don't do this often, would like to know what the best way to get a good representation of the full power ban of the car from down low upwards?

Since both are still in street guise I am more concerned with usable power around town and moderate highway, not that concerned with the numbers that will move the car over 160mph.

The main things looking to compare boost, Hp and torque curves.

Thanks in advance!
Old 10-27-2010 | 11:58 AM
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I can't answer your question but would like to request a group shot of your cars. You have exceptional taste in automobiles!
Old 10-27-2010 | 01:18 PM
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Looking forward to your dyno runs. Thanks for giving more info to the group.
Old 10-27-2010 | 05:31 PM
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Make sure you keep your foot down...
Old 10-27-2010 | 06:02 PM
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Me too. Please post dyno graphs.
Old 10-27-2010 | 08:05 PM
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Thanks should get a good shot of these cars together.

Originally Posted by knfeparty
I can't answer your question but would like to request a group shot of your cars. You have exceptional taste in automobiles!
Old 10-27-2010 | 08:08 PM
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Should have some numbers early next week.

Originally Posted by minho78
Me too. Please post dyno graphs.
Old 10-27-2010 | 08:29 PM
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Originally Posted by Black51
Make sure you keep your foot down...
So far that's the only advice I've gotten from this thread! I am interested in this thread as i have never had a dyno run on any of my vehicles...

And, I have an appointment 11am next Tuesday! I've never even seen one in person. Heck, I really don't know what to expect!!!
Old 10-27-2010 | 10:24 PM
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So I'm assuming you're just doing some max HP runs, no tuning, etc...?
Old 10-28-2010 | 12:11 AM
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Start logging at 2k RPM, then put the gas flat to the floor (WOT) and let the RPMs go all the way up to red line. Obviously, do both cars in the same gear - probably 4th.

Make sure boost and AFR are logged. You should have fun comparing the charts.

Old 10-28-2010 | 12:16 AM
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Originally Posted by Van
Start logging at 3k RPM, then put the gas flat to the floor (WOT) and let the RPMs go all the way up to red line. Obviously, do both cars in the same gear - probably 4th.

Make sure boost and AFR are logged. You should have fun comparing the charts.

It is advisable to go flat at 2500 on a 944 turbo for fourth gear results.
3k is slightly late - just sayin' from a tiny bit of experience.
Old 10-28-2010 | 12:42 AM
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a couple good responses...I hope that's what you were looking for rop3.

That makes sense, myself I just want to do a pull and see my A/FR's and of course power If the A/FR's are good I'll dial up a little more boost for the second pull.

Thanks for posting!
Old 10-28-2010 | 12:51 AM
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Originally Posted by elargentino
It is advisable to go flat at 2500 on a 944 turbo for fourth gear results.
3k is slightly late - just sayin' from a tiny bit of experience.
I edited my post after I uploaded the graph and saw it start at 2k...
Old 10-28-2010 | 07:15 AM
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Hey those look like nicely recovered sport seats!

Just waiting for the data logs from my VFLEX to ensure the settings are correct and all is optimized. Then off to the Dyno.

I am looking to get boost, A/FR's, HP, Torque but most important factors for me are:

Torque in regard to the increase and how it is spread, with the new kit installed.

Early spool up and the longevity of the spoolup compared over (stock).

Lastly HP same as above what the increase and spread/range is.

After the dyno runs I just picked up a new GTECH pro RR. Never used one but apparently it can calculate TQ/HP based on the weights of the cars also 0-60. End lastly any rolling speeds say 30-60 etc.

As for my newly rebuilt car, moderate displacement increase, entire rebuilt drivetrain from 951S, right down to harnesses, sensors etc. no expense spared. While much of this may not contribute to more power, the internals were lightened/strengthened, bigger intercooler, 3' fabspeed no cat. some of the later should give an advantage alone.

Lastly the full Vitesse S2 kit.

The other car is completely stock exhaust/motor etc. except for a $350 chip.

So needless to say I am expecting a lot, Should be very interesting! It's been a long time in the works.




Originally Posted by racerxrick
a couple good responses...I hope that's what you were looking for rop3.

That makes sense, myself I just want to do a pull and see my A/FR's and of course power If the A/FR's are good I'll dial up a little more boost for the second pull.

Thanks for posting!
Old 10-28-2010 | 12:00 PM
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post results please!

and thanks for the comment on the sport seats, had the center covered with suede, comfy and cool



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