gas mileage with 3.73's - FirebirdV6.com/CamaroV6.com Message Board

Announcement

Collapse
No announcement yet.

gas mileage with 3.73's

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • gas mileage with 3.73's

    i know its prolly been asked before, but will my gas mileage drop significantly if i get these gears? im somewhat concerned now that the gas price sky rocketed.

    also, would i notice an actual difference between my stock rear end (3.23 open differential) and 3.42 gears with LSD? or should i just make the jump to 3.73 rear end with LSD?
    96 Camaro M5. Dark metallic gree (?dont know the offical color name)<br />Home made Intake :: Headers, 3inch headers back to Flowmaster muffler :: spec stage 3 clutch Now installed, waiting for 3.42\'s and LSD next month<br /><a href=\"http://photobucket.com/albums/y192/RiceEatingCamaro/?action=view&current=newcar.jpg\" target=\"_blank\">My Car</a> <br /><br />Totalled Car.<br /><a href=\"http://bellsouthpwp.net/s/k/sk8er305/\" target=\"_blank\">96 CamaroRS</a>

  • #2
    If you want to get lots better acceleration, get 3.73's. the lsd will help you get traction and reduce your 60' times by maybe 2/10's. if you are worried about gas prices, get taller/wider tires. I'd say get vette rims that are 18x10.5 in back with 295-45-ZR18 meats on them. the stock diameter of 235-55 wheels on 16" rims is 26.1771. the new diameter w/ vette rims and huge meats is 28.4527. You, of course, will need either a jet scu or a HPP3 to correct the speedo to the new gears and meats.
    2001 Arctic White Firebird<br />T-Tops, 3.42 rear gear stock<br />Mods:K&N Air Filter,Whisper Air Induction Lid, maf screen removed, raised air box, Kumho Ecsta 712 255-50-ZR16 tires, BMR stb<br />Mods not installed yet: FTRA, SLP Lsd/Differential cover<br />Near Future Mods: HPP3, GMMG 3\" Exhaust , 1LE Swaybars, Transgo Shift Kit, MSD-DIS-4 w/ Accel Coil-Packs, Turquoise Blue Neon Underbody Kit, BMR Adj. LCA\'s, G2 Sfc\'s & V-braces, Pacesetter headers

    Comment


    • #3
      I would just go to 3.73s right away. 3.42s over 3.23s will not be worth the money. Mileage will go down some. Taller tires will reduce the overall gear ratio. 3.73s show 2/10 gain in 1/4 over 3.42s. LSD helps alot with traction.

      Comment


      • #4
        I went from 3:23 to 3:42 in my M5 and am happy, but regretful of not going with 3:73.

        Like Dom said, it's not worth the money.
        ...unless you absoloutely don't want to chance bad mileage if you're a highway driver but would like improved acceleration.
        2002 Camaro SS 6 Spd<br />Sebring Silver Metallic<br />Still breaking it in<p>Traded in - 2002 V6 5 Spd Camaro.<p>\"I\'ll never trust squirrels again.\"

        Comment


        • #5
          what does LSD stand for and what does it do? i'm thinking i want to upgrade to 3.73 too. if i'm reading correctly, i'll have to get my speedometer adjusted?
          1998 Sport Metallic Gold Camaro<br />Current Mods<br />AIWA CD/MP3 player<br />Flowmaster exhaust<br />Dual 3.5\" chrome exhaust tips<br />Removed Front Grill<br />Functional RAM AIR, ss-style hood<br />Exhaust Cutout<p>Future Mods:<br />Leather Seats<br />Improved audio system<br />Different wheels<br />Indiglo gauges<p><a href=\"http://hometown.aol.com/saturn2187/\" target=\"_blank\">http://hometown.aol.com/saturn2187/</a>

          Comment


          • #6
            Limited Slip Differential.

            The most common version is the $99 unit from SLP that is made by the folks at Zexel Torsion. Without getting into details - both tires spin when you launch. Not just one.
            2002 Camaro SS 6 Spd<br />Sebring Silver Metallic<br />Still breaking it in<p>Traded in - 2002 V6 5 Spd Camaro.<p>\"I\'ll never trust squirrels again.\"

            Comment


            • #7
              Does anybody with these gears know what the drop in fuel economy actually is with 3.73s? I do some highway, but mostly city. I mean, is it 'V8 bad' or 'big block bad'?
              \'94 Camaro 3.4<br />\"No, Starvin Marvin. That\'s my pot pie.\"

              Comment


              • #8
                To adjust your speedometer, SLP makes a processor that adjusts it, its $160,P/N 63008, if anyone knows of anything cheaper, tell me about it...i wouldnt mind saving a lil money!!! :D
                <b>Black</b> 1998 Pontiac <i>Firebird</i> A-4 swap<br />271.4rwhp/259.4rwtq NA<br />13.30@102.44 <br /><a href=\"http://www.freewebs.com/wickedsix98\" target=\"_blank\">www.freewebs.com/wickedsix98</a>

                Comment


                • #9
                  I personally can't speak from experience but am planning on doing a 3.73 rear myself. I do approx. 80% of my driving around town and don't anticipate mileage dropping much, if any, in the city. Mileage is based on the RPMs that you run at. Lower RPMs mean better mileage. Usually cruising at 35 - 45 I now use 4th gear but with 3.73s will probably be in 5th at almost the same RPMs so no loss in mpg.
                  \'01 Camaro M5 1SA \"Lightweight\" hardtop, Bright Red, Ebony cloth, FRA, Whisper Lid, B&B cat-back, Torsen 3.73 LSD, HPPIII (93 octane setting)<p>\'00 Camaro SS M6 T-Top, all GM and most SLP opts., Bright Red, Ebony leather, 4.10s, SLP long tubes, Loudmouth, CNC Stage II H/C, etc.

                  Comment


                  • #10
                    Will Someone PLEASE already Install 3:73 into their 5 Spd 3.8 and give a detailed account of the gains/losses :)

                    I personally am kicking myself in my own shins for not going with 3:73 (I did the 3:42 and I know I woulda had no trouble going further).
                    2002 Camaro SS 6 Spd<br />Sebring Silver Metallic<br />Still breaking it in<p>Traded in - 2002 V6 5 Spd Camaro.<p>\"I\'ll never trust squirrels again.\"

                    Comment


                    • #11
                      im definately doing it.. its just that i wouldnt be able to install it myself. or would i be able to? i heard that EVERYTHING has to be PERCISE or it will wine and grind up the teeth in the gears.. how much would a rear end job cost?
                      96 Camaro M5. Dark metallic gree (?dont know the offical color name)<br />Home made Intake :: Headers, 3inch headers back to Flowmaster muffler :: spec stage 3 clutch Now installed, waiting for 3.42\'s and LSD next month<br /><a href=\"http://photobucket.com/albums/y192/RiceEatingCamaro/?action=view&current=newcar.jpg\" target=\"_blank\">My Car</a> <br /><br />Totalled Car.<br /><a href=\"http://bellsouthpwp.net/s/k/sk8er305/\" target=\"_blank\">96 CamaroRS</a>

                      Comment


                      • #12
                        its one of those things that has to be done precise, yet can be done with a socket wrench and a sledge hammer...go figure [img]tongue.gif[/img]

                        i got my 3.42s off a buddy for 25 bucks, it's worth it to throw them in and see how i feel about them, and maybe go to 3.73 later.
                        i talked to james (12 sec), he said he's yet to hear of one of those Slp recalibrators working.
                        2011 Camaro LS 6M, in black.

                        Comment


                        • #13
                          Friend of Mine (SeanC97) Just got his installed.. We are going to the track on Wednesday.. He had a 97 Ms w/ 3.23.. Now he has the 3.73 LSD..

                          I am sure he will post up.. [img]smile.gif[/img]
                          2001 Cobalt Blue Hyundai Tiburon<br />Mods? Hehe.. Ofcourse.. ;)<br />15.810 @ 87.25 NEW TIME AGAIN!<br />TSR-0118 (www.TeamSR.org)<br />FORMER 1997 W68 Black Convertable Firebird Owner<br />14.723@95.65<p><br />V.P. of the 3:00 AM club.

                          Comment


                          • #14
                            Go with 3.73's and LSD. Definitely worth it. Gas mileage isnt really that bad.
                            <b>.::[ 0 ]::.</b><br /><b>1997 Camaro 3800 II M5</b> (30th edition)<br />[]B&M Ripper Shifter<br />[]Proform Shift Light<br />[]SLP Cold Air<br />[]Dynomax Exhaust<br />[]Richmond 3.73\'s<br />[]Zexel-Torsen LSD<br />[]180* Thermostat<br />[]Tail Blackouts<br /><a href=\"http://photos.yahoo.com/skyracer_x\" target=\"_blank\">pics</a>

                            Comment


                            • #15
                              someone said something about getting the computer reprogrammed for $160 by buying a unit off of slp. well i went to the chevrolet dealership and they'll do it for $55...of course you don't get to keep the computer programmer...but sheesh, how many times you going to need one of those? anyway, just thought you might want to know.
                              2000 NBM M6 Camaro Z28<br />323/335

                              Comment

                              Latest Topics

                              Collapse

                              FORUM SPONSORS

                              Collapse
                              Working...
                              X