...

Go Back   Lateral-g Forums > Technical Discussions > Transmission and Rear End
User Name
Password



Reply
 
Thread Tools Display Modes
  #1  
Old 07-24-2013, 02:15 PM
Sieg's Avatar
Sieg Sieg is offline
Moderator
 
Join Date: Dec 2010
Location: Pacific Northwet
Posts: 8,034
Thanks: 33
Thanked 99 Times in 41 Posts
Default

With your motor I'd probably go to 3:73 for maximum power leverage. Then see how they feel in the LS.

I was paying close attention to my rpm today on a typical trip to town and favorite backcountry loop and it's a fine line between 3:55's and 3:73's. I've been speculating on this too long, the 3:73's may win. 2250 rpm with my .63 6th and 26.5 tire is 75 mph, 2500 rpm is 85 mph.

The good thing about your trans is it doesn't have the low first gear........I've never understood why you'd want lower than the 2.66. Maybe really slow parades?
Reply With Quote
  #2  
Old 07-24-2013, 11:59 PM
FETorino's Avatar
FETorino FETorino is offline
Lateral-g Supporting Member
 
Join Date: Aug 2007
Location: Southern CA
Posts: 2,723
Thanks: 59
Thanked 63 Times in 21 Posts
Default

Quote:
Originally Posted by Sieg View Post
With your motor I'd probably go to 3:73 for maximum power leverage. Then see how they feel in the LS.

I was paying close attention to my rpm today on a typical trip to town and favorite backcountry loop and it's a fine line between 3:55's and 3:73's. I've been speculating on this too long, the 3:73's may win. 2250 rpm with my .63 6th and 26.5 tire is 75 mph, 2500 rpm is 85 mph.

The good thing about your trans is it doesn't have the low first gear........I've never understood why you'd want lower than the 2.66. Maybe really slow parades?
Actually I've never understood the .50 6th gear

A 4.10 rear gear will give you a 10.9 SLR which will make the car easy to drive on the street in slow speed stuff no matter what clutch or flywheel.

At 2200 rpm in 6th gear with a 26" tire you should be doing 83 mph so that seems like a nice hwy cruiser. At 2000 rpm you'd still be doing 75.5mph. I don't own an LS but I hear a mild one is happy at really low rpm so maybe less rear gear and running down the hwy below 2000 rpm makes the LS engine happy.

I'd choose between a 3.89 and a 4.10 especially if you aren't upgrading the motor soon. JMHO

__________________
Rob in SoCal

https://lateral-g.net/forums/show...10645&page=171


Last edited by FETorino; 07-25-2013 at 12:05 AM.
Reply With Quote
  #3  
Old 07-25-2013, 08:36 AM
Payton King's Avatar
Payton King Payton King is offline
Senior Member
 
Join Date: Nov 2004
Location: Charlotte, NC
Posts: 2,576
Thanks: 0
Thanked 23 Times in 18 Posts
Default Go with the 4.11

Help get the car moving with the lower power level. I had 4.11 in mine and in 6th at 65 I was turning 1750 rpm with a 27 inch tall tire. Had 3.80's in and would turn 1500 at 65. Big pain with the 3.80 if I slowed up from 65 in 6th I had to down shift. I highly doublt you will make it into 5th on a road course with the power level you are currently at.
Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 09:11 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright Lateral-g.net