3.55 Gear Ratio Question?

[ViperRichRT10]

I swapped my gears in my 2001 RT10 to 3.55s. Can anyone tell me what my new ratios are in 1st through 6th? I am curious to know the effect on the dyno in 4th. Thanks for your help and info!

 

[Ulysses]

First 2.66:1
Second 1.78:1
Third 1.3:1
Fourth 1:1
Fifth .74:1
Sixth .5:1

Multiply these times 3.55:1

I have to ask. How did you come to the conclusion that gears make any significant difference on a dyno?

 

[ViperRichRT10]

I have to ask. How did you come to the conclusion that gears make any significant difference on a dyno?

Because I was at our dyno day for the viper club and people said to run on the dyno in 4th because it is 1:1. That made me think that if that is the reason to run the dyno in 4th, that 3.55 gears would have a different ratio and thus a different effect since it is not 1:1 with different gears. I have no idea though. Can anyone shed some light on the subject for me?

 

[Simms]

I have to ask. How did you come to the conclusion that gears make any significant difference on a dyno?

http://vca2.viperclub.org/forums/showflat.php?Cat=&Board=UBB14&Number=498145&Forum=All_Forums&Words=dyno&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=allposts&Main=498145&Search=true#Post498145

http://vca2.viperclub.org/forums/showflat.php?Cat=&Board=UBB14&Number=501076&Forum=All_Forums&Words=gears&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=allposts&Main=501076&Search=true#Post501076

 

[Ulysses]

Your stock gear is 3.07:1.

Running in 4th, the transmission gear has a multiplication factor of 1. So your final drive ratio is 3.07:1.

Change your gears to 3.55. Running in 4th, your transmission gear still has a multiplication factor of 1. So your final drive ratio is 3.55:1.

 

[Ulysses]

Quote:
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I have to ask. How did you come to the conclusion that gears make any significant difference on a dyno?


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http://vca2.viperclub.org/forums/showflat.php?Cat=&Board=UBB14&Number=498145&Forum=All_Forums&Words=dyno&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=allposts&Main=498145&Search=true#Post498145

http://vca2.viperclub.org/forums/showflat.php?Cat=&Board=UBB14&Number=501076&Forum=All_Forums&Words=gears&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=allposts&Main=501076&Search=true#Post501076<br />

unless you can honestly say that these dyno runs were done in a controlled environment where the test mule and the test equipment are in the exact same controlled conditions, then the argument is flawed. There are too many variables.

 

[Simms]

unless you can honestly say that these dyno runs were done in a controlled environment where the test mule and the test equipment are in the exact same controlled conditions, then the argument is flawed. There are too many variables.

I agree, but I have seen similar results with atleast 5 other cars.

 

[Ulysses]

I agree also that there will be a difference when going from 3.07 to 3.55, but the difference is so small that it would fall into the margin of error of the measuring equipment.