Datamaster variables

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Dec 4, 2008 | 02:54 PM

simple green

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Racer

Joined: Feb 2008

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From: Victoria British Columbia

Datamaster variables

Hey Gents,

I'm trying to use the Datamaster Dyno and 1/4 mile calculator. Does anyone know the front surface area drag coefficient, the drivetrain loss and tire revolutions per mile? I'm running 40 series on 17" my car is a 94 LT1 6spd.

Chu
Eric

Dec 4, 2008 | 03:00 PM

simple green

Thread Starter

Racer

Joined: Feb 2008

Posts: 269

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From: Victoria British Columbia

Also, I think my rearend is a 3.36 does that sound right? and if anyone knows off hand what my 2nd + 3rd gear trans ratios are it would help.

I've just completed a blowerworks install and will post the gain results

Thanks
E.

Dec 4, 2008 | 04:14 PM

rodj

Le Mans Master

Joined: Aug 2000

Posts: 8,838

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From: Australia

Gear ratios - 1st-2.68, 2nd-1.80, 3rd-1.29, 4th-1.0, 5th-0.75, 6th-0.50, Reverse-2.50

Most allow 15%

Drag coefficient .34
(http://auto.howstuffworks.com/1984-corvette2.htm)

Last edited by rodj; Dec 4, 2008 at 04:32 PM.

Dec 4, 2008 | 04:19 PM

Aurora40

Le Mans Master

Joined: Apr 2005

Posts: 6,413

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From: The Old Dominion

The tire revs per mile, you can look at the specs from the tiremaker for your tire. I seem to recall reading the frontal area is around 19.5 sq. ft?

Dec 4, 2008 | 06:55 PM

JackDidley

Race Director

Joined: Sep 2003

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From: Database Error Indiana

I cant answer your questions but I can say the Datamaster time to distance calculator is very accurate. Always within a couple hundreths of what I run at the track.

Dec 4, 2008 | 07:04 PM

simple green

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Racer

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From: Victoria British Columbia

Great thanks all,
For future use I found this for revs per mile calculator http://www.gordon-glasgow.org/tirecalc.html

results to follow

Dec 4, 2008 | 07:13 PM

STL94LT1

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Joined: Jan 2002

Posts: 12,261

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From: O'Fallon Missouri

Quote:

Originally Posted by simple green

Also, I think my rearend is a 3.36 does that sound right?

Nope, all 94 M6 Vettes had 3.45 gears.

Dec 4, 2008 | 09:50 PM

simple green

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Racer

Joined: Feb 2008

Posts: 269

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From: Victoria British Columbia

results? What do you guys think?

My best 1/4 mile was 12.88 that's with no preburnout. And I'm having traction problems through 2nd gear

Anyways the datamaster is saying
321hp @ 5228 w/ 405ft/lbs @4165 stock

516hp @ 5228 w/ 523ft/lbs @ 5074 8psi boost w/ methanol injection