4th gear vs 5th on a dyno.

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Sep 18, 2005 | 08:20 PM

Chopper

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5th Gear Member

Joined: Feb 2004

Posts: 2,028

From:

4th gear vs 5th on a dyno.

I got a free run on a dynojet dyno the other day and my numbers were 255.3 Hp and 293.4 tq.The operator ran the car in 5th gear.I have stock rear end gears.Which way would that throw the numbers?I didn't think about it untill I was back home.

Sep 18, 2005 | 08:23 PM

racer02GTstang

5th Gear Member

Joined: Mar 2005

Posts: 4,687

From: Nashville/Knoxville, Tennessee

RE: 4th gear vs 5th on a dyno.

5th gear is not a 1:1 ratio, its overdrive.... 4th gear is 1:1... i think that is correct?

Sep 18, 2005 | 08:27 PM

ZW99GT

6th Gear Member

Joined: Nov 2004

Posts: 7,797

From: Tennessee

RE: 4th gear vs 5th on a dyno.

VERY nice numbers!

Sep 18, 2005 | 08:37 PM

Chopper

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5th Gear Member

Joined: Feb 2004

Posts: 2,028

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RE: 4th gear vs 5th on a dyno.

Quote:

ORIGINAL: racer02GTstang

5th gear is not a 1:1 ratio, its overdrive.... 4th gear is 1:1... i think that is correct?

Yes 4th is 1:1,5th is .62:1(I think)

Sep 18, 2005 | 10:36 PM

JD1969

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Joined: May 2004

Posts: 9,644

From: IL

RE: 4th gear vs 5th on a dyno.

Quote:

ORIGINAL: Chopper

I got a free run on a dynojet dyno the other day and my numbers were 255.3 Hp and 293.4 tq.The operator ran the car in 5th gear.I have stock rear end gears.Which way would that throw the numbers?I didn't think about it untill I was back home.

You had an operator that did not know what they were doing, the numbers are not correct. It will show a higher hp than what you really have.