View Full Version : which rear gear ratio for a glide


Lacajun
05-21-2012, 06:05 PM
I recently installed a glide in my car.I have 4;11 gears now and they need to be changed because they are wore out.The last time out and first time out with the glide I went 11.33 @ 121 w/a 1.63 60 ft (N/A)..However I was hitting the rev limiter when crossing the finish line (6900 RPM).I am planing on spraying a 150 shot so different gears are in order....i just dont want to go too high on the ratio so that my 60 ft. goes to sh**...Any suggestions......thanks

deerslayinrednek
05-21-2012, 07:21 PM
So was it faster or slower going from A4 to the Glide?

What about a 3.90 gear?

Packy
05-21-2012, 08:10 PM
I would say a 3.08 or maybe a 3.42 but that is just me.

JL ws-6
05-21-2012, 08:34 PM
3.73, any more then that will probably hurt it too much for the first 300 ft.

The Guy in MY 99TA
05-21-2012, 08:51 PM
what tire are you running? a 3.08 wouldnt exactly be acceptable unless its a turbo application. I wouldnt think

Lacajun
05-21-2012, 11:20 PM
what tire are you running? a 3.08 wouldnt exactly be acceptable unless its a turbo application. I wouldnt think
I am running 27 inch Hoosier Quick Time Pro's

Fbodyjunkie06
05-21-2012, 11:25 PM
3.73, any more then that will probably hurt it too much for the first 300 ft.

This is going to be close.

It depends a lot on your converter also and who built it and their philosophy in converter strategy.

I hope putting the 3.73 in though doesn't absolutely kill your shift extension from 1-2 which is the only draw back to a glide as that 1-2 shift extension RPM has to be spot on to keep the car in it's powerband.

Lacajun
05-21-2012, 11:35 PM
So was it faster or slower going from A4 to the Glide?

What about a 3.90 gear?

Fastest time with the built A4 was 11.75.When the glide was installed I also did a fast 90 set-up and a new converter.My 60 ft.didn't change....wish i would have did the glide a long time ago 11.75-11.33=.42....on the 11.33 pas I bounced it off the rev limiter from low to high and @ the line ...so I think it has a 11.2 or so in it N/A just like it is.With the right gears I am hoping for 10 anything N/A.

Lacajun
05-21-2012, 11:44 PM
This is going to be close.

It depends a lot on your converter also and who built it and their philosophy in converter strategy.

I hope putting the 3.73 in though doesn't absolutely kill your shift extension from 1-2 which is the only draw back to a glide as that 1-2 shift extension RPM has to be spot on to keep the car in it's powerband.
The converter is 3800 stall ....didn't want too much stall because I was planing on spraying.....was afraid of blowing through.Thinking of doing 3.90's and if that is still too low I'll put a 28 in. tire on it.

JL ws-6
05-22-2012, 09:20 AM
3.90 with a 28 should be good, or try the 28 before you change the gearing, that may fix all of it, at least before you spray it

06X6spdGTO
05-22-2012, 08:19 PM
We are running 4.56's to start out with on our LQ9 car.

Only running a 28x11.5x15 ET street (27.6" diam) with the rev limiter set a 7200rpm.

Should be off the rev limiter unless we are trapping more than 130mph.


This helps a little:
http://www.f-body.org/gears/

Lacajun
05-23-2012, 04:34 PM
We are running 4.56's to start out with on our LQ9 car.

Only running a 28x11.5x15 ET street (27.6" diam) with the rev limiter set a 7200rpm.

Should be off the rev limiter unless we are trapping more than 130mph.


This helps a little:
http://www.f-body.org/gears/

Good info.........................

Fbodyjunkie06
05-23-2012, 06:34 PM
3.90 with a 28 should be good, or try the 28 before you change the gearing, that may fix all of it, at least before you spray it

I was going to say 3.90 but we don't know how much more you are going to spray, the personality of your converter may be a lot looser with more spray it may only be slightly looser with more spray depending on how it was set-up.

I think with a 3.90 and a 28 you will find balance.

TJ
05-27-2012, 12:35 PM
We are running 4.56's to start out with on our LQ9 car.

Only running a 28x11.5x15 ET street (27.6" diam) with the rev limiter set a 7200rpm.

Should be off the rev limiter unless we are trapping more than 130mph.


This helps a little:
http://www.f-body.org/gears/

if its an auto setup you need to figure in converter slip.

Lacajun
05-30-2012, 04:33 PM
if its an auto setup you need to figure in converter slip.

I have no Ideal what my converter slippage is but I talked to the guy that built the converter about slippage and provided him w/cam specs ect.

Lacajun
05-30-2012, 04:37 PM
if its an auto setup you need to figure in converter slip.

I have no Ideal what my converter slippage is but I talked to the guy that built the converter about slippage and provided him w/cam specs ect. http://www.youtube.com/watch?v=G0OmQrtkp5k

TJ
05-30-2012, 09:23 PM
I have no Ideal what my converter slippage is but I talked to the guy that built the converter about slippage and provided him w/cam specs ect.

it plays an important part in the overall speed you can run. you mentioned 130 mph in your other post. through a gear and rpm calculation, yes, but with converter slip, you may only be able to run 120-125 depending on the efficiency of the converter.