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09-20-2014, 08:16 PM
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#1 |
 Drives: 2014 chevy camaro 1ss rs auto Join Date: Oct 2013
Location: miami florida
Posts: 82
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3.91 gears and F.I.?
Hello, i have a 2014 1ss rs l99 and i plan on adding 3.91 gears on it. My friend has the same car i do and just added them and i love the feel for it. I see post of people saying not to go with3.91 down the line if you are going F.I. down the line and i wanted to know why that was. For right now i just have a cold air intake, bo's ported throttle body and a cat back exhaust. Any input? Down the line im planing on going with cam and ported i.m. and ported heads. Long tubes and hfc. Then start saving up for a pro charger. Thanks in advance.
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09-20-2014, 08:18 PM
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#2 |
          
Drives: 2013 SS Join Date: May 2013
Location: DFW
Posts: 4,102
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I would stick to the stock ratio
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09-20-2014, 09:13 PM
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#3 |
Drives: 2013 A6 GT 5.0 Join Date: Nov 2009
Location: Edmond, OK
Posts: 2,909
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Go ahead and do it. Later on down the line do a partial trade of the full diff assembly with a M6 owner when you get the blower. However I would get LT headers and a tune before the gears unless it's a warranty thing.
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BLK/BLK 1SS/RS Ordered 11-01-2009 Took delivery 12-22-2009. Heads/cam/converter/bolt ons. SOLD Feb 2015 to fund 6th gen LT1 SS with 8L90E.
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09-20-2014, 09:48 PM
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#4 |
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'It's an experiment'
Drives: [COTW 2/09/15] '11 GPI LSA SC Z/LE Join Date: May 2014
Location: Dallas TX
Posts: 8,694
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I'm with 62nalide on this -- I looked into it -- I have 3.91s and if I went FI -- all I'd do is spin the tires -- hooking up would be a problem. Would have to go 3.23 or 3.45s if I went FI.
I decided to stay NA. 3.91s are great. FI will make it a torque machine -- thus the 3.91s will just spin away... -Don |
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09-20-2014, 09:54 PM
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#5 |
 
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I went with 3.45 on my auto. I go FI on Monday.
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09-20-2014, 10:59 PM
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#6 |
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Writer
Drives: 2010 SS / 1967 Camaro Join Date: May 2009
Location: Chicago, IL
Posts: 7,216
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The gears feel great because they spin his engine up quicker (simple way to say it).
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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 |
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09-20-2014, 11:28 PM
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#7 |
Drives: 2011 2ss/rs Join Date: Nov 2011
Location: Canada
Posts: 1,431
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My 11 Is supercharged and running 3.91s love it.
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09-21-2014, 12:17 AM
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#8 |
Drives: 2010 Camaro 1SS/RS RJT Join Date: Jan 2010
Location: NJ
Posts: 831
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Also depends on what type of FI, if your going Centri where the TRQ and HP is higher in the RPM range then 3.91s would be a good choice to get this heavy beast moving off the line...if your going PD blower then maybe the down low TRQ and gears would spin like a moooofoo but fun at the same time lol
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2010 Camaro SS LS3 Holley Hi-Ram Manifold,Custom grind boost cam,Vortech V-3,10Rib 3.47 Pully Airfilter Pipe Delete, 10 PSI, TSP LT Headers, Flowmaster Outlaws, Alky Control Meth Kit, PFADT 1.25, ZL1 Fuel Pump, DSS 1000HP axles, Mantic ER2 Clutch, Full BMR rear suspension drag pack upgrade. C6 Vette 18 rims with M/T 305 out back. COPO Hood
Race Proven Motorsports tuned  |
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09-21-2014, 09:21 AM
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#9 | |
Drives: Camaro SS/RS inferno red interior Join Date: Mar 2012
Location: Pompano Beach FL
Posts: 817
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Quote:
Also to the OP I have 3.91, headers, and all the other supporting mods in my sig. And I still have some trouble hooking up in my car. I would look into getting the 3.73 gears if you are to go with FI
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SoFlo Muscle Car Group
Miami/Broward |
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09-21-2014, 10:33 AM
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#10 |
Drives: Silver 2010 SS Camaro Join Date: Jul 2009
Location: TN
Posts: 2,562
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I have 390 gears and a whipple and love it. Sure it spins the tires easier but it gets these fat pigs moving a lot faster when not going full throttle also. I don't see the big deal with running them with FI especially if you get a good tire on it. I'm also a manual...
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MODS:
ADM built 417, 2.9L Whipple with 3.250 pulley, ADM ported and polished LSA heads,ADM stage3 cam,ADM LSA belt drive system,ADM CAI race scoop, ADM dual fuel pumps, ID 850's, BMR full suspension, Gforce 9 inch kit with 3.5 inch driveshaft, Street Slayer twin carbon clutch, Lingenfelter oil seperator. Tuned by built by ADM Performance, 763rwhp,705rwtq |
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09-22-2014, 07:31 AM
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#11 |
Drives: A wrench Join Date: Jan 2010
Location: East Atlanta
Posts: 353
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Take it from someone who does this stuff on the regular, I would not do 3.91's in an A6 car with forced induction. You can make all the power you want with a blower but if you can't put it to the ground & all you do is blow the tires off, it does you no good. "Spinnin ain't winnin"...
Depending on your desired power level I would run a 3.27 or 3.45 ratio. For anything 650rwhp and below, the 3.45 is a good option. 650-800rwhp needs the 3.27 to stay under control. IMO... |
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09-22-2014, 06:21 PM
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#12 |
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Black Ice
Drives: 2SS/RS Black w/ silver ice stripes Join Date: Jul 2009
Location: Pueblo,Co.
Posts: 898
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Ok it may sound stupid but they say no question is stupid. What is F.I.
 I know its not Fuel Injected. LoL
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09-22-2014, 06:26 PM
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#13 |
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Drives: Silver 2010 SS Camaro Join Date: Jul 2009
Location: TN
Posts: 2,562
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Forced induction.
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MODS:
ADM built 417, 2.9L Whipple with 3.250 pulley, ADM ported and polished LSA heads,ADM stage3 cam,ADM LSA belt drive system,ADM CAI race scoop, ADM dual fuel pumps, ID 850's, BMR full suspension, Gforce 9 inch kit with 3.5 inch driveshaft, Street Slayer twin carbon clutch, Lingenfelter oil seperator. Tuned by built by ADM Performance, 763rwhp,705rwtq |
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09-22-2014, 06:28 PM
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#14 | |
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Black Ice
Drives: 2SS/RS Black w/ silver ice stripes Join Date: Jul 2009
Location: Pueblo,Co.
Posts: 898
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Quote:
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