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Old 09-25-2018, 12:21 AM   #47 (permalink)
racprops
Master EcoModder
 
Join Date: Oct 2009
Location: Phoenix AZ
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Quote:
Originally Posted by 19bonestock88 View Post
Umm... 2.14 gears with a tall overdrive ratio in a van? How often do you plan on being in 8th gear? I bet not very often without some aero modding...

I am still playing around with the 2.14 to 2.39 gears, but as I alike to run at 80/85 MPH I do think I will be able to hit 8th a fair amount of time and again why I am building a engine with torque from 1000RPMs.

I have see it said it only takes 20HP to maintain 70MPG in a car so i figure it will be (?) 40HP to do the same....

First is my stock set up:

Then the 8L90 with two gears sets:
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Name:	4L60E Stock Trany and rear end Power adn Cruse shift points.jpg
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Name:	Final 8L80E with 239 Gears Shift points .jpg
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Name:	8L90 with 214.jpg
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