How to dyno A4?
Thread Starter
Pro
Joined: Mar 1999
Posts: 535
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From: GA
How to dyno A4?
Will be going to the dyno soon. Can anyone give me some feedback on how to properly dyno an A4? From what I gather, I should expect 20% - 22% drivetrain loss.
Which gear? I've heard you should keep it in 2nd or 3rd.
Should converter be locked up or not? How can/do you force this?
Any other points to consider?
Which gear? I've heard you should keep it in 2nd or 3rd.
Should converter be locked up or not? How can/do you force this?
Any other points to consider?
Le Mans Master
Joined: Jan 2001
Posts: 5,786
Likes: 6
From: Lafayette Colorado
Re: How to dyno A4? (mfrnka)
Everytime mine has been dynoed it has been in third gear. The rpms are slow increased until it third gear is shifted into. After it shifts into third, the rpms are slowly increased until about 300 rpms and WOT is applied. This way it prevents the transmission from trying to shift into second and torque spikes. About 20% to 25% is expected depending on gearing and tire size. One would see less rwhp with 4.11 gears and 28" tires compared to 3.15 gears and 26.7" tires.
Keith
[Modified by kromberg, 8:36 AM 7/22/2003]
Keith
[Modified by kromberg, 8:36 AM 7/22/2003]
Melting Slicks
Joined: Dec 2002
Posts: 3,296
Likes: 30
From: Friendswood, Tx
Re: How to dyno A4? (mfrnka)
Hopefully, the person operating the dyno knows all of this....if not, I'm not sure I'd feel comfortable having my car dynoed there.
Let us know how you do.
-Busa196-
Let us know how you do.
-Busa196-
Le Mans Master
Joined: Nov 2000
Posts: 7,294
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From: Coral Springs Florida
Re: How to dyno A4? (mfrnka)
When the car is equipped with 3.15 ratio or higher then the transmission should be in 3 and you will run the car through the gears until 60-65 mph..(it's really up to the operator) then floor it to about 120 mph and let off. With 2.73 gears I used to run the dyno in 2nd with the same process..:yesnod:
With a stock converter it's likely that it will be locked almost immediately..not to worry.:D
With a stock converter it's likely that it will be locked almost immediately..not to worry.:D
Thread Starter
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Joined: Mar 1999
Posts: 535
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From: GA
Re: How to dyno A4? (vstella)
TNTC5 - no worries about upshifting? Will the trans stay in third to the rev limiter or "protect" me and upshift right as I'm trying to make peak power numbers?
VStella - Thanks. I've got a Yank 3200 converter, but expect it should still lock as rpms and mph increase.
VStella - Thanks. I've got a Yank 3200 converter, but expect it should still lock as rpms and mph increase.
Thread Starter
Pro
Joined: Mar 1999
Posts: 535
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From: GA
Re: How to dyno A4? (lowprofiling)
I've heard good things about Lamar Walden in Buford and All Speed in Peachtree City. There's also Atlanta Chassis Dyno and one or two places on the NW side of town.
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Team Owner
Joined: Oct 1999
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From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Re: How to dyno A4? (mfrnka)
There is also Dyno Lab, Engineered and Team Ford in Cobb Co.
I would go to ACD or LWA. Let us know how the dyno goes.
[Modified by 93Polo, 2:32 PM 7/22/2003]
I would go to ACD or LWA. Let us know how the dyno goes.
[Modified by 93Polo, 2:32 PM 7/22/2003]
Safety Car
Joined: Jan 2000
Posts: 4,143
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Re: How to dyno A4? (Busa196)
Hopefully, the person operating the dyno knows all of this....if not, I'm not sure I'd feel comfortable having my car dynoed there.
Let us know how you do.
-Busa196-
Let us know how you do.
-Busa196-
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
Re: How to dyno A4? (mfrnka)
Mike, FWIW, my '02 you saw last week just spent 2 days at Lamar Walden Automotive and all went quite well. They treated it with extreme care. Very competent and comfortable with C5's.
:cheers:
Ed
:cheers:
Ed
Team Owner
Joined: Sep 2001
Posts: 23,283
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From: Lake Elsinore, CA
Re: How to dyno A4? (TNTC5)
Mike, go to Lamar Walden those guys are awesome!
Ed, was that your silver 02 there two weeks ago?
If you go there this Satursday, you will see my car there TNTC5 pewter
Ed, was that your silver 02 there two weeks ago?
If you go there this Satursday, you will see my car there TNTC5 pewter
:lol: TNTC5, look at my sig. :cheers: I agree, those guys are good.
Melting Slicks
Joined: Mar 1999
Posts: 2,499
Likes: 0
Re: How to dyno A4? (verskel)
Hopefully, the person operating the dyno knows all of this....if not, I'm not sure I'd feel comfortable having my car dynoed there.
Let us know how you do.
-Busa196-
:iagree: ......a word of advice ~ it's more fun if you can join a "group" on Dyno day - you will learn so much your head will spin ! :crazy: :yesnod: :lol:
Let us know how you do.
-Busa196-
:iagree: ......a word of advice ~ it's more fun if you can join a "group" on Dyno day - you will learn so much your head will spin ! :crazy: :yesnod: :lol: