Gears?
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Re: Gears? (Epyon127)
There sure is, for example if I replace my stock 2.59s with say 3.54s my tach will read 1.367 times higher (3.54/2.59) for any given speed.
Further top speed in any gear will be reduced by the same ratio.
Further top speed in any gear will be reduced by the same ratio.
Elite Torch Red Member
Joined: Sep 1999
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From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Re: Gears? (Epyon127)
Look for a program called "Chase gear selector" I downloaded it from vette92, you plug in tire size and gear ratio and it shows you what you need to know.
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Re: Gears? (Epyon127)
I just emailed you the program, let me know how it works out.
Intermediate
Joined: Jun 2003
Posts: 26
Likes: 0
From: Brownsburg IN
Re: Gears? (Epyon127)
I have a 92 6spd and put 411's raised the RPMs 302 at 70 mph. There is a calculator at http://www.ring-pinion.com.
Drifting
Joined: Aug 2002
Posts: 1,857
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From: Yakima WA
Re: Gears? (mike.burke)
MJ- can you email that program to me? Or if you don't mind, just tell me what my actual speed is based on 3.54 gears (86 auto) w/ 275/40/18's on rear and 17's on front? ie- If speedo says I am doing 70 MPH, isn't it something more like 65 MPH?
If my dash says 70 MPH now, I am right at 2k RPM's.
If my dash says 70 MPH now, I am right at 2k RPM's.
Le Mans Master
Joined: Feb 2002
Posts: 7,858
Likes: 2
Re: Gears? (65Z01)
Here's a good one but if your trans isn't in the lsit you'll need to know the internal ratios, plus 6th gear ratio:
http://www.dalesplace.com/htm/inform...calculator.htm
According to the this calc, when I plug in the ratios for the 4L60E and my rear tire size (OEM) It shows that rpms should be 1759 @ 75mph for a 2.59 rear, and 2085rpm @75 for 3.07 gears. Now, I have 2.59's according to my RPO sticker *but* my tach shows spot-on 2000rpm in OD locked-up @ 75mph!
Is there the ratio stamped on the outside of the differential within view? I need to check. Otherwise I guess I need to jack it and in neutral spin the rear tires and count drive shaft revolutions per tire revolution :crazy:
http://www.dalesplace.com/htm/inform...calculator.htm
According to the this calc, when I plug in the ratios for the 4L60E and my rear tire size (OEM) It shows that rpms should be 1759 @ 75mph for a 2.59 rear, and 2085rpm @75 for 3.07 gears. Now, I have 2.59's according to my RPO sticker *but* my tach shows spot-on 2000rpm in OD locked-up @ 75mph!
Is there the ratio stamped on the outside of the differential within view? I need to check. Otherwise I guess I need to jack it and in neutral spin the rear tires and count drive shaft revolutions per tire revolution :crazy:
