How would our A6 LFX respond with a posi 3.91 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

C-redfly · 10-26-2012, 12:44 PM

Anybody got this set up yet?

bcwooten85 · 10-26-2012, 02:23 PM

etmx183 · 11-01-2012, 12:06 PM

You know unless you do an SS or M6 diff swap you will not be able to install a posi unit into our A6 diffs. <---- 2012 LFX A6 I'm talking about. I am installing a New Chevy OEM 3:42 posi setup this winter. The car should have a great holeshot with the 3:91 diff.

zer0ss · 11-01-2012, 01:36 PM

Quote:

Originally Posted by etmx183

You know unless you do an SS or M6 diff swap you will not be able to install a posi unit into our A6 diffs. <---- 2012 LFX A6 I'm talking about. I am installing a New Chevy OEM 3:42 posi setup this winter. The car should have a great holeshot with the 3:91 diff.

I've been looking at a diff swap along with going FI. Seems like the full swap generally costs 2-3K.

C-redfly · 11-01-2012, 10:01 PM

Quote:

Originally Posted by etmx183

You know unless you do an SS or M6 diff swap you will not be able to install a posi unit into our A6 diffs. <---- 2012 LFX A6 I'm talking about. I am installing a New Chevy OEM 3:42 posi setup this winter. The car should have a great holeshot with the 3:91 diff.

Yea I am aware that the differentials are different and I need to do a full swap of hubs, axles as well.
3.42's would be great but if i am gonna spend the money I'm gonna go all out with the 3.91's

JohnnyBfromPeoria · 11-02-2012, 09:08 PM

Have you graphed the change in where the shift points and cruising rpm will end up? I suppose it doesn't matter as much with an A6 (although there will be a greater RPM change than an M6 car), but I think in an M6 car, it adds another shift at the end of a quarter mile run, for example. Since the torque curve is acceptable above a certain RPM on these engines, I'm not too concerned about having the cruise RPM higher, either.

For the M6 cars, it's "just" the R&P, and a set-up person who knows their stuff, right?

John B.

wyd_trkr · 11-04-2012, 08:11 PM

Quote:

Originally Posted by zer0ss

I've been looking at a diff swap along with going FI. Seems like the full swap generally costs 2-3K.

Wouldn't it be much easier to buy an SS in the first place, verses change the the entire differentail and have to go to the expense of having someone recalibrate the A6 Transmission etc. Just sayin', as because if I wanted to go the more performance route, I would've bought an SS under warranty to have more horsepower and performance, rather than trying to make a car do the same thing and costing more money, when the SS does out of the box!....

C-redfly · 11-04-2012, 09:20 PM

Quote:

Originally Posted by wyd_trkr

Wouldn't it be much easier to buy an SS in the first place, verses change the the entire differentail and have to go to the expense of having someone recalibrate the A6 Transmission etc. Just sayin', as because if I wanted to go the more performance route, I would've bought an SS under warranty to have more horsepower and performance, rather than trying to make a car do the same thing and costing more money, when the SS does out of the box!....

Yea your correct if you wanted more performance then a SS would be the route to take. But in this case my finance got a great deal on 2011 v6 and we want to keep the car note down low. So we want to give it more low end pull hence the 3.91's

10-26-2012, 12:44 PM	#1
C-redfly Drives: 2013 VR vert ZL1 Join Date: Aug 2012 Location: Los Angeles Posts: 1,495	How would our A6 LFX respond with a posi 3.91 Anybody got this set up yet?

10-26-2012, 02:23 PM	#2
bcwooten85 Drives: 2012 Chevy Camaro 2LS Join Date: Jun 2012 Location: Muncie, IN Posts: 152	__________________ 2012 Camaro 2LS

11-02-2012, 09:08 PM	#6
JohnnyBfromPeoria Drives: 2012 LS M6, Black Join Date: May 2009 Location: Phoenix, AZ Posts: 2,045	Have you graphed the change in where the shift points and cruising rpm will end up? I suppose it doesn't matter as much with an A6 (although there will be a greater RPM change than an M6 car), but I think in an M6 car, it adds another shift at the end of a quarter mile run, for example. Since the torque curve is acceptable above a certain RPM on these engines, I'm not too concerned about having the cruise RPM higher, either. For the M6 cars, it's "just" the R&P, and a set-up person who knows their stuff, right? John B. __________________ 12 LS M6, IPF S/C, ASA GT-5 wheels, VMax PTB 1995 Mitsubishi Montero SR 1987 Dodge Raider Turbo Project 1986 Mitsubishi Montero 2.4l FI Transplant

11-01-2012, 12:06 PM	#3
etmx183 Drives: 2012 Camaro 2LT RS Join Date: Mar 2012 Location: Baltimore, Maryland Posts: 1,633 View My Garage	You know unless you do an SS or M6 diff swap you will not be able to install a posi unit into our A6 diffs. <---- 2012 LFX A6 I'm talking about. I am installing a New Chevy OEM 3:42 posi setup this winter. The car should have a great holeshot with the 3:91 diff.