Auto's with 3.91's? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Apex Motorsports · 06-30-2014, 11:18 AM

Quote:

Originally Posted by stoopid

I assume what that means is it's less fuel efficient.

It depends on how/where you use your car but in general you will see a 1-2 mpg reduction. These cars have 2 overdrive gears so it is nothing like doing gear swaps in older cars.

C-redfly · 07-01-2014, 11:46 PM

Quote:

Originally Posted by Apex Chase

It depends on how/where you use your car but in general you will see a 1-2 mpg reduction. These cars have 2 overdrive gears so it is nothing like doing gear swaps in older cars.

Yea I have a El Camino with 3.73s and 350 tranny and I would not want my 5th gen camaro to have the similar rpm range. But like you said these cars have 2 overdrive gears oppose to none in my 350th

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SS PANTHER · 07-02-2014, 05:35 AM

Are there any 3:70's that are equal or better to OEM gears for durability, longevity and quietness that you would recommend? I think this would be a better all around gear ratio for an A6.

C-redfly · 07-02-2014, 11:56 AM

Quote:

Originally Posted by SS PANTHER

Are there any 3:70's that are equal or better to OEM gears for durability, longevity and quietness that you would recommend? I think this would be a better all around gear ratio for an A6.

Yea I'm kinda torn between 3.45 and 3.91 for all around purposes.

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Kyle2k · 07-02-2014, 05:21 PM

Quote:

Originally Posted by SS PANTHER

Are there any 3:70's that are equal or better to OEM gears for durability, longevity and quietness that you would recommend? I think this would be a better all around gear ratio for an A6.

Lingenfelter has 3.70s and they are doing the job fine for me

CC1299 · 07-02-2014, 06:36 PM

I'm looking at bumping up to 3:70, have a manual trans.
My feeling is a 383/350 turbo with 3:73 is just street able, nothing more, but have 6 speed should even it out.
Thoughts?

Ryne @ CMS · 07-02-2014, 06:52 PM

near stock power level definitely do 3.91's... makes a big difference... i highly suggest staying OEM gears, meaning AAM factory gears, like 3.27, 3.45. 3.91... the factory AAM gears install great, always easy to get the correct pattern, and always quiet...

Jrichards73 · 07-03-2014, 10:18 PM

It feels like it has more power, not like it is working harder. At cruise you just get used to it, acceleration you remember.

Lost about 2 mpg but I drive like I stole it.

C-redfly · 07-05-2014, 04:39 PM

Thanks for the tips Ryne and that's exactly what I was looking for, thanks JR73

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hammdo · 07-05-2014, 04:47 PM

3.91s have been fantastic in my A6 L99. In the city its really gets going with minimal effort. On the highway, its just motors along around 2300 rpm @ 70.

Now, I have 402 RWHP -- we'll see what happen when I get closer to 500
Probably need some DRs or new wheels by then ;o)

-Don

Pro Stock John · 07-07-2014, 08:30 AM

Yeah I'm doing about 2300 at 70 on the highway with 'em.

digdeep0169 · 07-07-2014, 08:40 AM

A6 L99 chime in - love "mines"

save $$ go 3.91s cuz as soon as you do 3.70s you may just want more...

07-03-2014, 10:18 PM	#22
Jrichards73 Drives: 2011 2SS/RS Victory Red Join Date: Aug 2011 Location: Virginia Posts: 921	It feels like it has more power, not like it is working harder. At cruise you just get used to it, acceleration you remember. Lost about 2 mpg but I drive like I stole it. __________________ Updates: BTR Stage 2 VVT Cam Kit w/Smith Brothers Trunnions, Fluidampr, RX catch can, B&M Trans pan mod, Kooks Black Headers, Borla S-tunes, Eibach Multi-Pro-R2 coilovers and Swaybars, BMR Full Bushing kit with Toe and Trailing arms, RB Rotors w/EBC Pads, GForce 1400 Axles (now on order). AVH-X5800BHS in Scosche GM5201AB.

07-07-2014, 08:30 AM	#25
Pro Stock John Writer Drives: 2010 SS / 1967 Camaro Join Date: May 2009 Location: Chicago, IL Posts: 7,221	Yeah I'm doing about 2300 at 70 on the highway with 'em. __________________ PROJECT HEAVY CHEVY Camaro Now: Mods for the Masses Part I \| Part II 13.15@106 1.95 \| 100% Stock 12.37@112 1.85 \| + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune 12.06@113 1.70 \| + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune 11.84@115 1.59 \| + 3.91s + Race Star 17x7 Fronts 10.90@125 1.47 \| + GPI VVT Cam + BW Ported Heads + CD 3800

07-07-2014, 08:40 AM	#26
digdeep0169 Drives: 2012 Camaro SS 45th Anniversary Join Date: Sep 2013 Location: Albuquerque Posts: 963 View My Garage	A6 L99 chime in - love "mines" save $$ go 3.91s cuz as soon as you do 3.70s you may just want more... __________________ ~ 2012 SS ~

07-02-2014, 05:35 AM	#17
SS PANTHER Drives: 2013 SS Supercharged Convertible Join Date: May 2013 Location: SoCal Posts: 2,713	Are there any 3:70's that are equal or better to OEM gears for durability, longevity and quietness that you would recommend? I think this would be a better all around gear ratio for an A6.

07-02-2014, 06:36 PM	#20
CC1299 Drives: 1969 SS Join Date: Apr 2013 Location: Everywhere Posts: 26	I'm looking at bumping up to 3:70, have a manual trans. My feeling is a 383/350 turbo with 3:73 is just street able, nothing more, but have 6 speed should even it out. Thoughts?

07-02-2014, 06:52 PM	#21
Ryne @ CMS Drives: 16 Camaro SS, 06 C6 Z06, 15 Sierra Join Date: Nov 2009 Location: Murrieta, CA Posts: 778	near stock power level definitely do 3.91's... makes a big difference... i highly suggest staying OEM gears, meaning AAM factory gears, like 3.27, 3.45. 3.91... the factory AAM gears install great, always easy to get the correct pattern, and always quiet...

07-05-2014, 04:39 PM	#23
C-redfly Drives: 2013 VR vert ZL1 Join Date: Aug 2012 Location: Los Angeles Posts: 1,495	Thanks for the tips Ryne and that's exactly what I was looking for, thanks JR73 Sent from my SM-N900P using Tapatalk

07-05-2014, 04:47 PM	#24
hammdo 'It's an experiment' Drives: [COTW 2/09/15] '11 GPI LSA SC Z/LE Join Date: May 2014 Location: Dallas TX Posts: 8,700 View My Garage	3.91s have been fantastic in my A6 L99. In the city its really gets going with minimal effort. On the highway, its just motors along around 2300 rpm @ 70. Now, I have 402 RWHP -- we'll see what happen when I get closer to 500 Probably need some DRs or new wheels by then ;o) -Don