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Venom55
08-22-2003, 08:14 PM
Well I had my car dynoed today. I had it done at Extreme Velocity in Mauldin...same place I described in my other post.
This is what I put down:

Max Power: 251.0 @ 5750RPM
Max Torque: 251.9 @ 4250RPM
Max Speed: 130MPH

We never let it run to redline; he shut it down at 5750. Basically he said the car would keep building power until redline but i wasn't too comfortable running it up that high. My Fuel:Air was ok, I think it was like 13.9 or so. He said my numbers would probably equate to about 280 or so on an inertia dyno and about 320-325 flywheel HP.

Anybody else had their cars dynoed on this type of dyno? If so what kind of numbers did you put down?

Mike

tcrews
08-22-2003, 08:46 PM
Why wouldn't you want to run it up to 7,000rpm ??? It's designed to do just that!

You'd stop making power well before 7,000rpm but it'll show you how long you hold it before it starts dropping off (power that is).

Go back and let it rip on the dyno :)

itsrlong
08-23-2003, 03:18 AM
What was the weight he used on your car? Here's what '01 Procharged Cobra w/10lb setup did at Modular Madness in Mooresville, NC:

(3750 lb. load on both pulls)

1st pull:
385.2 RWHP @ 6250 rpm
323.3 TQ @ 6250 rpm

2nd pull: (30 min. cool down)
394.9 RWHP @ 6250 rpm
332.4 TQ @ 6250 rpm

Don said my car was only making about 8lb of boost due to belt slippage...

itsrlong
08-23-2003, 04:54 AM
Here is the conversion that is supposed to get close to converting Mustang Dyno to Dynojet Dyno:

(MDHP=Mustang Dyno Horsepower results)

MDHP*.9/2615+1*MDHP=Dynojet Horsepower

Hope this helps.

Venom55
08-23-2003, 07:23 PM
the weight he used was 3625...as far as that formula...it doesn't make too much sense to me...how does that work out?:doubt:

itsrlong
08-23-2003, 11:56 PM
Basically your 251 rwhp on a Mustang dyno translates to about 272 rwhp on a Dynojet dyno. 251 times .9 divided by 2615 plus 1 times 251 = 272.6. This the formula Mustang Dyno support guys gave to my tuner. Hope this helps.

Bartman01
08-24-2003, 12:49 AM
Originally posted by itsrlong
Here is the conversion that is supposed to get close to converting Mustang Dyno to Dynojet Dyno:

(MDHP=Mustang Dyno Horsepower results)

MDHP*.9/2615+1*MDHP=Dynojet Horsepower

Hope this helps.

Not to be nitpicky (just making sure I understand this), you mean
(MDHP *.9 / 2615 + 1) * MDHP, right?

The way you wrote it would end up being (MDHP*.9/265)+(1*MDHP) because the multiplication and division would take precedence over the addition.

Thanks for the info.

itsrlong
08-24-2003, 01:13 AM
Yeah, you just pretty much punch in the numbers, in that order, in a calculator and that's what you get.

Bartman01
08-24-2003, 12:29 PM
Originally posted by itsrlong
Yeah, you just pretty much punch in the numbers, in that order, in a calculator and that's what you get.

Thanks. That is what I thought, but you know what happens when you assume.

Venom55
08-24-2003, 02:53 PM
Ahh, thanks for clearing it up, I was using the old "Please Excuse My Dear Aunt Sally" meathod and it wasn't working out ;) . I know we all remember that!

Mike

P.S. For those of us that don't:

Please=Perenthesis
Excuse=Exponents
My=Multiply
Dear=Divide
Aunt=Add
Sally=Subtract

:thumbsup:

NO 5 OH
08-27-2003, 06:22 AM
Originally posted by itsrlong
What was the weight he used on your car? Here's what '01 Procharged Cobra w/10lb setup did at Modular Madness in Mooresville, NC:

(3750 lb. load on both pulls)

1st pull:
385.2 RWHP @ 6250 rpm
323.3 TQ @ 6250 rpm

2nd pull: (30 min. cool down)
394.9 RWHP @ 6250 rpm
332.4 TQ @ 6250 rpm

Don said my car was only making about 8lb of boost due to belt slippage...

Nice numbers... I just have to ask and you and those of you reading will have to disregard the OT ;)

Where in Hickory exactly are you from? I live in Hildebran, about 10 minutes away. It's nice to know there's somebody else around this small town that has a Cobra as well ;)

Perhaps we can meet up sometime.

Shannon