Guys with 3.91 gears in a 6spd manual - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Jasper · 01-27-2015, 07:54 AM

I would like to know a couple of things before I do this:

1) I understand that the powerband will shift. How does it feel when on the highway and you want to downshift to pass? Do we lose a lot of top end power after the gear install in favor of low end power?

2) Has anybody done a 0-60 run? This is the area i'm trying to improve upon rather than the quarter mile. I understand I should be able to get off the line quicker but will lose top end which is fine with me. But I'm wondering if there is a real improvement in 0-30, 0-60 etc.

Any negative feelings with the gears? Is 1st gear still useable? Will I be needing to shift at a really low speed now?

Thanks
J

H-E · 01-27-2015, 08:07 AM

What is your power?

fldrummer · 01-27-2015, 09:23 AM

You don't lose any top-end power (or any power, for that matter). You'll just get through your powerband quicker and you'll feel like you have more torque everywhere. I still think it's the best bang-for-your-buck mod out there.

If you're N/A, first gear will be perfectly useable. If you add a PD blower, it gets a bit dicey, but scary fun (I used to have 4.10s, before I grenaded them).

Snidely Whiplash · 01-27-2015, 10:00 AM

Quote:

Originally Posted by H-E

What is your power?

I guess he no savvy?

Apex Motorsports · 01-27-2015, 10:00 AM

Quote:

Originally Posted by fldrummer

You don't lose any top-end power (or any power, for that matter). You'll just get through your powerband quicker and you'll feel like you have more torque everywhere. I still think it's the best bang-for-your-buck mod out there.

If you're N/A, first gear will be perfectly useable. If you add a PD blower, it gets a bit dicey, but scary fun (I used to have 4.10s, before I grenaded them).

This. You will have an equivalent torque gain of approximately 13% or 54.6 lb.-ft. of torque at all RPMs.

Jasper · 01-27-2015, 10:57 AM

Sweet. I am normally aspirated with an intake and tune.

But does the zero-60 improve?

Smirnoff · 01-27-2015, 06:41 PM

What size drag radials or slicks?

camarosspower · 01-27-2015, 07:55 PM

0-60 improves if you get traction. Overall I like the 3.91's. On the highway the car feels much lighter and I don't see a reason to downshift. It picks up faster now

beasstmode · 01-27-2015, 08:37 PM

How much does it affect the overall top speed?

Jeff_SS · 01-27-2015, 10:51 PM

How much will it help in the 1/4m or 1/2m over the stock 3.45's? I'm cam only

camarosspower · 01-27-2015, 11:17 PM

Helped me on the 1/4 with a .2 faster and two mph gain from my previous run on a worst 60'. That was my first time out there with the gears and I only done two passes that night. Only downfall I can think off is 4th gear ends at 140mph. I didn't shift into 5th as I thought that was fast enough.

LSXBumblebee · 01-28-2015, 02:47 AM

5th can do 155 with plenty of room to go

3.91 is great if you like spinning tires when you have a supercharger. lol

camarosspower · 01-28-2015, 05:56 AM

Quote:

Originally Posted by ericsysmin

5th can do 155 with plenty of room to go

3.91 is great if you like spinning tires when you have a supercharger. lol

Does 5th gear still have any power in it or will it just bog down? Isn't that a cruising gear?

Merc · 01-28-2015, 11:38 AM

I have had both 3:91 and 4:10 in my M6 car loved them both. If I had to choose a favorite 4:10 would be the ones I liked best. Turned 11:72 with those gears, Bolt On's with slicks and skinnies.

01-27-2015, 07:54 AM	#1
Jasper Drives: 2011 Summit White Camaro SS (LS3) Join Date: Sep 2014 Location: Welland, Ontario Canada Posts: 542	Guys with 3.91 gears in a 6spd manual I would like to know a couple of things before I do this: 1) I understand that the powerband will shift. How does it feel when on the highway and you want to downshift to pass? Do we lose a lot of top end power after the gear install in favor of low end power? 2) Has anybody done a 0-60 run? This is the area i'm trying to improve upon rather than the quarter mile. I understand I should be able to get off the line quicker but will lose top end which is fine with me. But I'm wondering if there is a real improvement in 0-30, 0-60 etc. Any negative feelings with the gears? Is 1st gear still useable? Will I be needing to shift at a really low speed now? Thanks J

01-27-2015, 09:23 AM	#3
fldrummer "Black Ace" Drives: Supercharged 2010 SS, 2016 Golf R Join Date: Aug 2008 Location: Ft. Lauderdale, FL Posts: 1,352	You don't lose any top-end power (or any power, for that matter). You'll just get through your powerband quicker and you'll feel like you have more torque everywhere. I still think it's the best bang-for-your-buck mod out there. If you're N/A, first gear will be perfectly useable. If you add a PD blower, it gets a bit dicey, but scary fun (I used to have 4.10s, before I grenaded them). __________________ 2010 2SS/RS M6 "Black Ace" - Delivered 6/4/2009 Mods: Forged 416 LS3, Maggie TVS 2300 SC (~11 psi), custom cam (232/247, .630/.630, 118 LSA), 90-lb. injectors, ZL1 fuel pump & ADM controller, Alky Control meth kit, Monster LT1-SC twin-disk clutch, ZL1 drivetrain conversion w/ DSS 1000-HP axles & 1-pc. driveshaft, CAI Inc. intake w/ ADM scoop, XS Power full exhaust (1 7/8" LT headers with 3" off-road pipes), VMAX CNC-ported TB, LSR adjustable sway bars, LPE rear end-links, BMR 1" drop, BMR polyurethane bushings; UMI trailing arms & toe rods. Built & tuned by Kraftworks. 755 rwhp/708 rwtq

01-27-2015, 06:41 PM	#7
Smirnoff Drives: Camaro SS Join Date: Mar 2010 Location: Motorcity Dragway Posts: 978	What size drag radials or slicks? __________________ 11.90's w/headers, CAI, custom tune, slicks/skinnys, shifter & 100+ Ethyl.

01-27-2015, 10:51 PM	#10
Jeff_SS "Cam Only" Drives: 2013 Camaro SS Join Date: Nov 2011 Location: Scottsdale, AZ Posts: 1,709 View My Garage	How much will it help in the 1/4m or 1/2m over the stock 3.45's? I'm cam only __________________ 2013 AGM Camaro 2SS/RS M6 \| LSA Blower, 2.5" pulley, 10% lower, FIC1000's, Fore Innovations Twin Pump fuel system w/ Flex Fuel, CMS Custom Grind Cam, Kooks 1 7/8" headers w/ catless off-road pipes, NPP Exhaust, 3.91's, JLT ZL1 Intake, Prospeed Heat Exchanger \| Pfadt Suspension, 1LE Sway Bars \| DSS 1000hp axles \| Tuned by Ryne @ CMS E85: 734rwhp/636rwtq (mustang dyno)

01-28-2015, 11:38 AM	#14
Merc In The Circle Drives: 2010 Camaro 2SSRS IOM M6 Join Date: May 2009 Location: Abbotsford BC Canada Posts: 11,291	I have had both 3:91 and 4:10 in my M6 car loved them both. If I had to choose a favorite 4:10 would be the ones I liked best. Turned 11:72 with those gears, Bolt On's with slicks and skinnies. __________________ My Build Thread

01-27-2015, 08:07 AM	#2
H-E Account Suspended Drives: 2010 zr1 Camaro 2011 vert Join Date: Apr 2013 Location: everywhere Posts: 1,121	What is your power?

01-27-2015, 10:57 AM	#6
Jasper Drives: 2011 Summit White Camaro SS (LS3) Join Date: Sep 2014 Location: Welland, Ontario Canada Posts: 542	Sweet. I am normally aspirated with an intake and tune. But does the zero-60 improve?

01-27-2015, 07:55 PM	#8
camarosspower Drives: 2010 camaro ss Join Date: Jun 2010 Location: Port Arthur, Tx Posts: 2,383	0-60 improves if you get traction. Overall I like the 3.91's. On the highway the car feels much lighter and I don't see a reason to downshift. It picks up faster now

01-27-2015, 08:37 PM	#9
beasstmode Drives: 2011 camaro ss Join Date: Aug 2014 Location: surprise, az Posts: 204	How much does it affect the overall top speed?

01-27-2015, 11:17 PM	#11
camarosspower Drives: 2010 camaro ss Join Date: Jun 2010 Location: Port Arthur, Tx Posts: 2,383	Helped me on the 1/4 with a .2 faster and two mph gain from my previous run on a worst 60'. That was my first time out there with the gears and I only done two passes that night. Only downfall I can think off is 4th gear ends at 140mph. I didn't shift into 5th as I thought that was fast enough.

01-28-2015, 02:47 AM	#12
LSXBumblebee LSX Bumblebee Drives: 2014 LSX Camaro Join Date: Jul 2014 Location: United States Posts: 434 View My Garage	5th can do 155 with plenty of room to go 3.91 is great if you like spinning tires when you have a supercharger. lol