08-10-2014, 10:33 PM | #1 |
Gears 3:73 or 3:91?
I have a 2010 camaro ss 6m Mods. cam throttle body manifold heads headers and etc. Going put supercharger on but looking do gears before wanted get some ideas 3.73 or 3.91 ?
|
|
08-11-2014, 02:23 AM | #2 |
|
Some people will say a 3.91 is to short for a blower. I can't wait to add a blower to mine. With 3.91 you will shift at 40-44mph and shift out of second at 60-64. So the real question is can you shift that fast with a blower on your motor?
|
08-11-2014, 08:33 AM | #3 |
What would you go with then for gear?
|
|
08-11-2014, 09:00 AM | #4 |
Drives: '11 Camaro Supercharged Convertible Join Date: May 2014
Location: NJ
Posts: 481
|
Like it was said already, if you're gonna put a blower on, do the 3.73. 3.91's are great too with a blower, but it's just harder to hook up from a dead stop. Not saying it can't be done, but it will be more difficult.
__________________
2011 Triple Black SS convertible, LSX 427, PRC 260cc heads, Callies Ultra Billet Rods, Wiseco -20 cc piston, Callies Dragon Slayer crank, Strange Dana 60 rear w/3.73 gear ratio and driveshaft, Pfadt coilovers, Pfadt sway bars, Pfadt trailing arms, Pfadt tie rods, Pfadt subframe bushings, Vortech YSi with wastegate and twin BOV, Haltech ECU, Mantic 9000 Twin Clutch, ALKY control meth system with dual nozzle, Squash twin fuel pumps, ACS T3 ports, VIS Terminator Hood, Seibon ZL style lip.
|
08-12-2014, 07:37 PM | #5 |
Centrifugal supercharger go with the 3.91s. A top mount just keep the 3.45s or go with the 3.73.
With a centrifugal and 3.91s you leave the line at a low RPMs and launch pretty hard. They build more and more power as the RPMs go up. With the top mount they make there power down low and just keep it relatively the same throughout the RPMs. Will give you a good smoke show with lower gears. But seem to work good with higher gears. I personally like 3.91 gears. They make the car feel about 300bs lighter just driving normal. And I run a little V3 supercharger. It's a very predictable easy to control set up even with it making a bit over 700rwhp. Also is much easier on the rest of the drivetrain. |
|
08-12-2014, 07:56 PM | #6 |
|
Slickcas I had 410's with my V3 and loved them before they blew up LOL I'm thinking of going with 3:91's next, what RPM do you launch at?
|
08-12-2014, 10:24 PM | #7 |
With Nitto 555R's I am most consistent at around 2500 RPMs. But have got a few 1.81 60' by taking the RPMs all the way up to 5500 and just slipping the clutch a bit and lightly rolling on the gas. Basically I'm just using the stored energy in the motor and flywheel to get the car moving. I just run a street alignment, i'm sure with an aggressive alignment you could do a lot better.
Never heard of 3.91s breaking. But sticky tires and a hard launch will break something on these manual cars. |
|
08-13-2014, 05:28 AM | #8 |
Fight Crime, Drive Armed
Drives: '14 2SS Yelo Maro, HD collection Join Date: Jun 2013
Location: NRH, TX
Posts: 985
|
Leave it stock at 3.45. If you factor in the ZL1 3.73 rear gears with the transmission gearing, it's very close to the SS 3.45 and it's transmission gearing.
__________________
Bring back Sunoco 260 to the local station. Some folks STILL drive L-88s and need the good gas.
|
08-13-2014, 04:40 PM | #9 |
Writer
Drives: 2010 SS / 1967 Camaro Join Date: May 2009
Location: Chicago, IL
Posts: 7,221
|
3.91 gears + blower will be quite the spin fest.
__________________
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 |
08-14-2014, 11:48 AM | #10 |
"Black Ace"
Drives: Supercharged 2010 SS, 2016 Golf R Join Date: Aug 2008
Location: Ft. Lauderdale, FL
Posts: 1,352
|
Yep! I had 4.10s with my Maggie. That was some good, scary fun...while it lasted. LOL
__________________
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 |
08-14-2014, 12:04 PM | #11 |
Drives: 2010 Camaro SS Join Date: Aug 2013
Location: Central PA
Posts: 438
|
3.89's with my Novi 1500 setup (9" rear). Had 3.50's in it. One of the best changes I have made to the car! I haven't tried it at the strip yet with the 3.89's. On street tires, it wont matter. Spin fest regardless. With slicks, recovery from a spin is always easier with lower gears (less wheel speed).
|
08-14-2014, 08:49 PM | #12 |
"Black Ace"
Drives: Supercharged 2010 SS, 2016 Golf R Join Date: Aug 2008
Location: Ft. Lauderdale, FL
Posts: 1,352
|
Even though it's still spin city, now that I'm back to stock 3.45s, I think 3.73s would be the more ideal setup. When I finally upgrade the rear, I'll probably go that route, maybe 3.89s or 3.91s.
__________________
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 |
08-31-2014, 01:28 AM | #13 |
Fight Crime, Drive Armed
Drives: '14 2SS Yelo Maro, HD collection Join Date: Jun 2013
Location: NRH, TX
Posts: 985
|
Blower and 3.91 - that's a racecar combo on 26-27" slicks.
For a street car, PSJ is correct. You had better have a cool uncle who owns a tire shop. That low ratio tranny first gear will blow the tires every time with 3.91 rear gears powered by a huffer.
__________________
Bring back Sunoco 260 to the local station. Some folks STILL drive L-88s and need the good gas.
|
|
|
|
|