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Am I right with speedo gear ?

Started by Nacho-RT74, June 15, 2008, 04:01:19 PM

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Nacho-RT74

June 15, 2008, 04:01:19 PM
tires/wheel combo: 255/60-15
Diff gear ratio: 3.55:1
speedo gear: 34 teeth  :shruggy:

Did I choose the right one ?
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

John_Kunkel

#1
June 15, 2008, 05:49:04 PM

Yep, actual math is 34.41.
Pardon me but my karma just ran over your dogma.

Nacho-RT74

#2
June 15, 2008, 11:24:02 PM
yep I know ;D . Used the Excel table from Moparts, but wanted to be sure about experiences on streets... 27" diameter with 3.55 ratio
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

Nacho-RT74

#3
June 16, 2008, 06:47:16 PM
Ok, Moparts EXCEL table states at 3000 RPM around 63 MPH... I'm pretty sure I got 85 MPH reading on speedo at 3000 RPM... something is wrong here

:shruggy:
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html
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