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08-04-2020, 06:57 PM
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#1 |
 
Drives: 2013 Camaro 2SS/RS Join Date: Aug 2017
Location: Worthington
Posts: 153
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Gear Ratios
I am looking at a different gear ratio for my 2013 Camaro SS (Auto).
I have been looking at 3.73 or 3.91 I saw the thread of a guy doing the math. He stated 3.91 are good but when you get to 550-600hp you should back off to the 3.73? Which would you guys consider better? I also will be changing to a stage 3 cam, powerband pulley, bigger tires, full suspension, and few other minor things that will also be installed the same times as the gear ratio.
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TSP Stage 2 L99VVT-2.2 Camshaft 227/239, .629/.629, 113 LSA, Circle D Converter 3000-3200 PRC 260cc, Cylinder Head (Ported for the camshaft)
TSP.660" Dual Spring Kit w/ PAC Dual Springs & Titanium Retainers, 2.165"/1.59" Stainless Valves w/ Hollow Stem Intake, Comp Phase Limiter, 7.5" Push Length Rod, New GM VVT Camshaft Bolts, D.O.D Delete Kit, Ported Intake Manifold, Kooks High Flow Catted-Long Tube Headers, Flowmaster Outlaw Cat-back Exhausts Cold Air Inductions Cold Air Intake, 95MM Throttle Body Tuned on 91 Octane Gas |
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08-04-2020, 07:26 PM
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#2 |
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Account Suspended
Drives: 2013 Sparkly Red One Join Date: Dec 2018
Location: Hospitality State
Posts: 2,558
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If you will be doing a lot of drag racing, go 3.91. If not, stay with what you have.
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08-04-2020, 07:39 PM
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#3 | |
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Drives: 2013 Camaro 2SS/RS Join Date: Aug 2017
Location: Worthington
Posts: 153
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Quote:
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TSP Stage 2 L99VVT-2.2 Camshaft 227/239, .629/.629, 113 LSA, Circle D Converter 3000-3200 PRC 260cc, Cylinder Head (Ported for the camshaft)
TSP.660" Dual Spring Kit w/ PAC Dual Springs & Titanium Retainers, 2.165"/1.59" Stainless Valves w/ Hollow Stem Intake, Comp Phase Limiter, 7.5" Push Length Rod, New GM VVT Camshaft Bolts, D.O.D Delete Kit, Ported Intake Manifold, Kooks High Flow Catted-Long Tube Headers, Flowmaster Outlaw Cat-back Exhausts Cold Air Inductions Cold Air Intake, 95MM Throttle Body Tuned on 91 Octane Gas |
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08-04-2020, 08:00 PM
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#4 |
 Drives: 2011 Camaro SS Convertible Join Date: Nov 2015
Location: Rochester, NY
Posts: 671
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You don't "have" to drag race in order to enjoy 3.91 gears. You bought a v8 Camaro because you wanted to have some fun driving, feeling that v8 kick in. The Camaro is a heavy car, and swapping out the stock gears makes it feel way lighter. 1st and 2nd really snap you back into the seat. It's like increasing the HP without adding headers or a supercharger. I love mine and would never go back. Just make sure you have it done by someone who knows what they're doing. I found a Chevy dealer who had a mechanic who specialized in upgrading Corvettes and Camaros.
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08-04-2020, 08:32 PM
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#5 | |
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Drives: Chevy Camaro SS, Chevy Corvette, Join Date: Aug 2019
Location: Illinois
Posts: 149
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Quote:
Dan |
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08-04-2020, 08:36 PM
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#6 |
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GPI Sales Consultant
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3.91's are a BLAST for all motor auto cars - stock cam, big cam, anything naturally aspirated.
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GPI Max Package 2.0: Brodix BR7 heads/GPI porting, MAX3 cam, ST2116LSR, BSR Max Lift rockers, LS7 LSXR with 103mm TB, Vararam OTR, Mcleod RXT, G-Force/Strange 9" IRS setup with 4.63 gear. 551whp, 11.1@124mph.
Got a question about a GPI product? Feel free to shoot me a message!  |
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08-04-2020, 08:49 PM
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#7 | |
 Drives: 2012 Camaro SS Convertible 6MT Join Date: Jun 2020
Location: Algonquin, IL
Posts: 258
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08-05-2020, 12:11 AM
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#8 | |
Drives: 5th Gen L99 Join Date: Nov 2017
Location: Lake Havasu City
Posts: 244
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Quote:
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LSA conversion 2.5 upper 10% lower, L99 converted to LS3. TSP 229/244 cam, TSP LS3 ported and milled heads milled .015,Kooks LT’s no cats, Roto Fab, Borla arak cat back. 3200 stall,Forgestar F14 18’s and drag radials, pedders coil overs, BMR trailing arms & adjustable toe rods, mildly stripped Interior 685/613 on E 610/571 on 91
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08-05-2020, 03:14 AM
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#9 |
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Give speed a chance
Drives: 2015 Camaro 2LS, 2015 Camaro Z/28 Join Date: Nov 2019
Location: Mesa, Az
Posts: 2,224
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One of the most tried and true ways to see improvement on any performance vehicle is rear gearing. While it's more pricey on our Gen 5 Camaros than the GM A-bodies I've been involved with you still can't go wrong with a well set-up 3.91 ratio. As tempting as the youtube videos can be it would be wise to choose a qualified technician.
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2LS: a TREMENDOUS machine. Z/28: it's a BIT MORE POWERFUL, of course.
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08-05-2020, 03:40 AM
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#10 |
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Drives: 2010 Camaro 2SS Join Date: May 2016
Location: Kissimmee
Posts: 158
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Ok As far as I’m concerned you should just do the 3.73 zl1 swap and be done with it.Yes it’s a little heavy.But it’s almost bulletproof.And if you piece it together like I did you end up with almost the same amount as upgrading and putting 3.91 in the current diff.Also no tiny axles to break!
Last edited by Warship2k15; 08-05-2020 at 03:54 AM. |
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08-05-2020, 06:51 AM
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#11 | |
Drives: Ashen grey, 1SS, L99 Join Date: Aug 2016
Location: Oklahoma
Posts: 526
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Roto-fab CAI, Nick Williams 102mm TB, LOD X1 V3 intake manifold, GMPP LS3 heads, Night Fury cam, TSP 2” long tubes, Corsa ZL-1 catback, Nitrous Outlet 102mm plate kit/150 shot, NGK BR7EF plugs with Taylor plug wires, DSX flex fuel kit, ZL-1 fuel pump and injectors, B&M deep trans pan, Yank 3400 converter, 3.45s with BMR Delrin bushings, mishimoto 169° Thermostat, GM ground effects, T-Rex upper grill, Z/28 Spoiler, Lolly pop Lime brake calipers, ZL1 10 spoke wheels, 12” subwoofer, and custom paint matched interior.
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