Gear Advice

Discussion in 'Technical' started by Scotty P, Oct 8, 2003.

  1. Scotty P

    Scotty P Member

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    Help me out here folks! Ordering a PowerTrak Locker rear end (8")and am waffling on the gear choice. I am planning on driving this car a few thousand miles a year, little freeway driving and mostly put-putting to shows and the track MAYBE 2 or 3 times. (been there, done that when I was younger!) running a C4 with 3000 stall (sees about 2700rpm). Single plane manifold with a predator carb and a cam in the neighborhood of .575 at 110* seperatoin duration around 280 (I think, installed it a looong time ago) Currently have 3.00 and the car will light em up at will. Tires will be 275-60-15 which are 28" tall and yes, they fit into the wheel wells. I was leaning towards 4.11 as the motor runs well between 2500-7000rpm and I don't mind the cruise on the freeway at approx 2800-3100rpms. But also, the 3.91's look like a good fit. Comments? Scott
     
  2. Old Guy

    Old Guy Member

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    Gears

    Wow, with that combo you have I would definately go with at least a 4:11. A track only car would probably need more stall and more gear too. Just my opinion though.
     
  3. Scotty P

    Scotty P Member

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    Old Guy

    So, ou feel tat for a stret "toy" with occasional highwa use the 4.1's iwl be a god gear? I know it i not perfct for the 1/4 but that only b a few tims. And I reall pln n taking m foot out of it round 550-600 rpms thee day. Just a toy nw, not daily driver. Thanks for the input Sctt
     
  4. PINKY

    PINKY .....John Ford.....

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    I am going with 4.11's this winter in my mule. I am going to do the occasional street driving and I do not have plans to put it on the interstate, but I figure I can if I have to.
    My dad has 4.11's in his ranchero with a 460 and its alot of rpms for the highway, in my opinion.
     
  5. Dan Starnes

    Dan Starnes Original owner

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    After 25 years with a set of 4:11's I changed to a 3:70 this year. I like the change in every aspect, and once I get the car dialed in, I will probably run a better E.T. The biggest change is it runs about 600 -700 less rpm's on the road.
    Dan
     
  6. Scotty P

    Scotty P Member

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    Dan

    What rpm were you crossing the line at in the quater? Times, mph? Scott
     
  7. PINKY

    PINKY .....John Ford.....

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    I am not sure that Dan's car can truly relate to yours. He has a toploader.
    With the 4.86's that are currently in mine, I went through the traps at 7,800 rpm in the 1/4.
     
  8. Mavaholic

    Mavaholic Growing older but not up!

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    I am running 3:89's with a top loader although that shouldnt make any difference cause the 4 speed and automatics all have a 1:1 final gear. I go through the traps in the 1/4 at approx 5700 rpm @ 108 mph and 13.02 et. A good set of slicks should make mine at least .5 seconds faster since starting line traction really sucked.
     
  9. PINKY

    PINKY .....John Ford.....

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    Sorry, did not think about that.
    But it should still be different...shouldn't it?
    I mean its taking you 3 shifts to get to 1/1.
    Where as the c4 only has 2. So the RPM's, I would think will not be the same. Cause he is going to be at 1/1 longer? right?
    :confused:
     
    Last edited: Oct 13, 2003

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