Here is a list of speed vs RPM per gear (ratios) - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

solo40oz · 06-20-2010, 12:11 AM

Since there have been some recent posts about installing different gears, I thought you all might like to know what the impact is to speed vs RPM. These calculations all assume that 20" wheels are being used.

Dentyneice · 06-20-2010, 12:15 AM

Good info. Are 3.9s available yet?

2010 Bumblebee · 06-20-2010, 09:45 AM

Good info. Did you get it from the computer or use a calculator? The Auto only revs to 6000 RPMs. Maybe the ones that people mod rev higher.

RedJewelSS · 06-20-2010, 09:57 AM

Quote:

Originally Posted by 2010 Bumblebee

Good info. Did you get it from the computer or use a calculator? The Auto only revs to 6000 RPMs. Maybe the ones that people mod rev higher.

yea it could go higher. ls3 rev limiter is 6600 i think but 7k is no problem

THE EVIL TW1N · 06-20-2010, 10:18 AM

4.10's are BARELY adequate. I wouldn't really call it a performance gear when mated to that transmission/rear tire height.

Gangster · 06-20-2010, 10:32 AM

Thanks for the info, ive been going back and forth between 3.73 and 4.10 but after reading the charts I think the 3.90 is the best way to go. Does anyone know if they make them yet??

solo40oz · 06-20-2010, 10:45 AM

Quote:

Originally Posted by 2010 Bumblebee

Good info. Did you get it from the computer or use a calculator? The Auto only revs to 6000 RPMs. Maybe the ones that people mod rev higher.

My dad wrote a little calculator in excel - you plug in the tire size, rear axle ratio, and each transmission gear, and then it computes the wheel radius and then dumps out the speed per rpm

zen · 06-20-2010, 12:21 PM

You might double check your calculations. Re V6 auto; It seems to me, from what I recall when I last checked, that at 2000RPM in 6th gear the MPH is 72 not 78.

This is getting the info real time not calculated.

I just ran the calculation and it does come out 77.897. I guess I will have to check again to see if my torque converter is locking up or not.

JohnForeman · 06-21-2010, 08:08 AM

i have a factory 2ss A6, what is my factory rear axle ratio?

cdn2usa · 06-21-2010, 10:33 AM

Quote:

Originally Posted by JohnForeman

i have a factory 2ss A6, what is my factory rear axle ratio?

The Autos have 3.27, the Manuals have 3.45 ratios.

JEFF2010SSMANUAL · 06-21-2010, 10:36 AM

Thanks, thats COOL.

2010 Bumblebee · 06-21-2010, 12:26 PM

Quote:

Originally Posted by solo40oz

My dad wrote a little calculator in excel - you plug in the tire size, rear axle ratio, and each transmission gear, and then it computes the wheel radius and then dumps out the speed per rpm

That's neat ! Cool ! If you download the demo of EFI live and a stock camaro tune, you will similar charts like this in the program, but your charts give a good look at it.

danhr · 06-21-2010, 12:58 PM

www.f-body.org/gears

MikeZ28 · 06-21-2010, 02:26 PM

If I read those tables right, the stock auto 6-speed/3.27 actually has shorter lower gearing than the manual/3.45?! The 6 speed runs 1st gear out over 50 MPH, that's tall!

06-20-2010, 12:11 AM	#1
solo40oz Drives: My wife crazy Join Date: May 2009 Location: Austin Posts: 740 View My Garage	Here is a list of speed vs RPM per gear (ratios) Since there have been some recent posts about installing different gears, I thought you all might like to know what the impact is to speed vs RPM. These calculations all assume that 20" wheels are being used. Attached Images

06-20-2010, 12:15 AM	#2
Dentyneice Drives: 2010 Camaro 2ss Join Date: Apr 2009 Location: new Jersey Posts: 254	Good info. Are 3.9s available yet? __________________ 2010 CGM/Black 2SS M6 20% Tint -:- Hurst 44% Short Throw Shifter -:- Viper 5901 Alarm/Remote start -:- High Gloss Black Painted Calipers + White Brembo Decal

06-20-2010, 09:45 AM	#3
2010 Bumblebee Drives: Transformers Edition Camaro 2SS/RS Join Date: Jan 2010 Location: Mass Posts: 1,048 View My Garage	Good info. Did you get it from the computer or use a calculator? The Auto only revs to 6000 RPMs. Maybe the ones that people mod rev higher. __________________ The Yellow Camaro Club http://www.camaro5.com/forums/group.php?groupid=128 Northern Massachusetts & Southern New Hampshire Camaro Club http://www.camaro5.com/forums/group.php?groupid=127 The mother of all supercharger questions thread http://www.camaro5.com/forums/showthread.php?t=77958 My 2010 Camaro Review http://www.camaro5.com/forums/showthread.php?p=2025442#post2025442 2010 Transformer Edition Camaro L99 Auto

06-20-2010, 12:21 PM	#8
zen Drives: 2011 CTS CPE & 2010 2LT/RS CGM Join Date: Jun 2009 Location: Nevada Posts: 337	You might double check your calculations. Re V6 auto; It seems to me, from what I recall when I last checked, that at 2000RPM in 6th gear the MPH is 72 not 78. This is getting the info real time not calculated. I just ran the calculation and it does come out 77.897. I guess I will have to check again to see if my torque converter is locking up or not. Last edited by zen; 06-20-2010 at 02:15 PM.

06-21-2010, 08:08 AM	#9
JohnForeman Drives: 2010 2SSRS Join Date: Sep 2009 Location: Indiana Posts: 121	i have a factory 2ss A6, what is my factory rear axle ratio? __________________ 2010 2SSRSA6 - GFX 35% Window Tint 93 Octane Diablo Predator Tune

06-20-2010, 10:18 AM	#5
THE EVIL TW1N Banned Drives: 2003 Cobra Convertible Join Date: Feb 2009 Location: CA Posts: 2,925	4.10's are BARELY adequate. I wouldn't really call it a performance gear when mated to that transmission/rear tire height.

06-20-2010, 10:32 AM	#6
Gangster Camaro Crazy Drives: 2010 1SS/RS IBM/Grey M6 Join Date: Jun 2010 Location: Westchester,New York Posts: 202	Thanks for the info, ive been going back and forth between 3.73 and 4.10 but after reading the charts I think the 3.90 is the best way to go. Does anyone know if they make them yet??

06-21-2010, 10:36 AM	#11
JEFF2010SSMANUAL JEFF2010SSMANUAL Drives: IOM 2SS/RS LS3 Join Date: Aug 2008 Location: Northern IL Posts: 1,953	Thanks, thats COOL.

06-21-2010, 12:58 PM	#13
danhr BAMF SS Drives: 2016 Camaro 1SS A8 Join Date: Mar 2010 Location: Ford City, PA Posts: 3,023	www.f-body.org/gears __________________ 2016 1SS A8: FBO + Circle D + P1X + Meth + Tuned by Pray Performance Stock Longblock 800 SAE rwhp. 9.4 @ 145 mph.

06-21-2010, 02:26 PM	#14
MikeZ28 Drives: '04 GTO, '00 Z28, '95 Z28 Join Date: Mar 2009 Location: Austin, TX Posts: 225	If I read those tables right, the stock auto 6-speed/3.27 actually has shorter lower gearing than the manual/3.45?! The 6 speed runs 1st gear out over 50 MPH, that's tall!

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