3.91 Gear Swap - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

rontammy0 · 03-09-2018, 08:05 AM

Quote:

Originally Posted by rviper24

How much faster does the car feel with 3.91's?

On the l99 it pulls alot better from a stop. I notice it more when I want to get on it. I have a big hill heading out of the town I live in...the car hardly works at all going up it. I dont dd my car but if I did ..391s are fine.

Hilflos · 03-09-2018, 11:36 AM

I do daily mine, LS3, 3.91's are fine. 1st gear isn't as useful as it was. Starting in 2nd is more easily doable.

No complaints. It feels significantly faster. Had them for over a year now. So, hard to quantify.

Talladega · 03-09-2018, 05:07 PM

Quote:

Originally Posted by flyinglow57

3.91-3.45=.46

.46/3.45=.1333. Or 13%

At 60mph 8mph off

You nailed it, I used an GPS Speedometer app to check and it is 13% off.

Bandit63 · 03-09-2018, 10:40 PM

I put 3.91’s and 3200 stall in my car, about 7 tenths quicker in 1/8 mile over stock

OHIOSS · 03-09-2018, 10:46 PM

Gear swap was my favorite mod, my only wish is I would have done it sooner. When I had the swap I couldn't find anyone to adjust my speedo. No dealers could do it, I must have called 30 places within 100 miles of my house. Several places said they could do it but when I got there they couldn't

Steve @ JDP did the tune on my car so I thought maybe he could do it even though he was more than 100 miles from me. I emailed him and as usual he got right back to me and told me to bring it over when I have the time. It took him about 3 minutes to calibrate the speedo to the new gearset.

jergarr · 03-09-2018, 10:55 PM

I daily drive mine and I've never regretted it. Should of came this way from the factory.

acammer · 03-10-2018, 08:03 AM

Quote:

Originally Posted by OHIOSS

Gear swap was my favorite mod, my only wish is I would have done it sooner. When I had the swap I couldn't find anyone to adjust my speedo. No dealers could do it, I must have called 30 places within 100 miles of my house. Several places said they could do it but when I got there they couldn't

Steve @ JDP did the tune on my car so I thought maybe he could do it even though he was more than 100 miles from me. I emailed him and as usual he got right back to me and told me to bring it over when I have the time. It took him about 3 minutes to calibrate the speedo to the new gearset.

Anybody with HPTuners should be able to make the change in under 5 minutes - takes longer to connect to the car than it does to modify the tune.

OHIOSS · 03-10-2018, 08:57 AM

Quote:

Originally Posted by acammer

Anybody with HPTuners should be able to make the change in under 5 minutes - takes longer to connect to the car than it does to modify the tune.

This was 7+ years ago and yes I was told it was no big deal to get it done. The dealership that put my new gearset in had calibration right on their estimate but when I went to get the car they said they didn't have the software from GM yet. I'm not making it up, I drove for 4 months using a GPS speedo app on my phone. I'm sure everyone has the software and the ability to do it now but they didn't back when I needed it done.

Bretts · 03-10-2018, 02:18 PM

I really enjoyed the gear swap to 3.91 not sure how the car will be with the smaller track tires i am planning on and the BTR stage3 cam will see..

03-09-2018, 10:40 PM	#18
Bandit63 Drives: 2011 Camaro SS Join Date: Feb 2017 Location: Paducah Ky Posts: 257	I put 3.91’s and 3200 stall in my car, about 7 tenths quicker in 1/8 mile over stock __________________ MRR M228 Wheels, Circle D 3200 Stall, 3.91 Gear, Texas Speed VVT 3.2 Cam, CHE Rocker Arm Bushings, Texas Speed Headers, No Cats

03-09-2018, 10:55 PM	#20
jergarr Drives: 11' RJT 2SS/RS L99 Join Date: Jun 2014 Location: Chicago Posts: 298	I daily drive mine and I've never regretted it. Should of came this way from the factory. __________________ GPI VVT3 Cam Circle D 3800 Single Disc Stall 1LE 3.91s Stainless Power Headers w/cats Fluidampr 25% UDP Cold Air Inductions Intake Bo White Ported Throttle Body ADM Trans Cooler Some BMR Goodies

03-10-2018, 02:18 PM	#23
Bretts SS Drives: 2015 2ss rs Join Date: Oct 2014 Location: Alberta Posts: 911 View My Garage	I really enjoyed the gear swap to 3.91 not sure how the car will be with the smaller track tires i am planning on and the BTR stage3 cam will see.. __________________ CCW sp16a track set, BTR stage 3 cam and kooks longtubes with high flow catsLocks@7.5 degrees castor and radius arm inserts, Ride Tech 2coilovers JDP upper control arm bushings BMR lower knuckle bushing Bo White throttle body3.91 gears Spohn del-sphere toe link and trailing arms Prothane subframe bushings

03-09-2018, 11:36 AM	#16
Hilflos Drives: 2015 1SS / RS NPP Join Date: Apr 2015 Location: Dayton Ohio Posts: 353	I do daily mine, LS3, 3.91's are fine. 1st gear isn't as useful as it was. Starting in 2nd is more easily doable. No complaints. It feels significantly faster. Had them for over a year now. So, hard to quantify.

03-09-2018, 10:46 PM	#19
OHIOSS Russ Drives: Yukon Denali, Charger, CamaroSS Join Date: Jun 2009 Location: Ohio Posts: 2,811	Gear swap was my favorite mod, my only wish is I would have done it sooner. When I had the swap I couldn't find anyone to adjust my speedo. No dealers could do it, I must have called 30 places within 100 miles of my house. Several places said they could do it but when I got there they couldn't Steve @ JDP did the tune on my car so I thought maybe he could do it even though he was more than 100 miles from me. I emailed him and as usual he got right back to me and told me to bring it over when I have the time. It took him about 3 minutes to calibrate the speedo to the new gearset.