Best gears for street?

Discussion in 'Transmission & Driveline Topics' started by ratpatrol71z28, May 11, 2013.

  1. ratpatrol71z28

    ratpatrol71z28 Veteran Member

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    I am currently running the TH350 but maybe in the future I will move towards an OD trans, but for what I do now th350 does the job just fine! :)
     
  2. largestar

    largestar Member

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    I'm a stick guy myself, but i do like a good 2nd gear scratch from an auto
     
  3. ZRODDER

    ZRODDER Member

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    Islander2u, I like the old pic of the camaro, but what's the story on the 66 Chevelle in front of it. I've got a 67 coming after the 77Z.
     
  4. K1ng0011

    K1ng0011 Veteran Member

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    For finding the right gear ratio you need to figure out what your ok with. Some guys dont mind cruising down the highway at 3500rpm other guys dont like it. It does not matter which camp you fall into if you want to find the right gear ratio for your application here are the tools and some information in the post below that I made a while back. There is a windows program in the post that will allow you to try out different combinations to see what works for you.

    https://nastyz28.com/threads/switched-to-3-73-gears-and-not-loving-it.319939/page-4#post-3648675
     
  5. autobahn

    autobahn New Member

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    What trans do you have manual or auto ? auto gears will prob be around 290 manual 342 I have 342 Tremec TKO 5spd at 65 mph 2100 rpm it setting on 285 35 18 Nitto NT555 G2
     
  6. PBZ28

    PBZ28 Member

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  7. PBZ28

    PBZ28 Member

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    Don't forget to add in additional rpm’s from your stall converter with an auto trans.
     
  8. Plant Engineer

    Plant Engineer Veteran Member

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    You can run a SBC or BBC all day every day at 3500 RPM. Thats the sweet spot especially if you are talking a performance build with something that resembles a big cam. This whole cruising at 2000 RPM at 80 MPH is a modern contrivance that comes from CAFE and emissions standards . Lugging a performance built engine will be harder on it than running it at a higher ( but not too high ) RPM range. Harder on bearings, makes it more detonation prone and hard on the oil.
     
    dave@ztech and big gear head like this.
  9. PBZ28

    PBZ28 Member

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    Couldn’t agree more with PE. The little 385 stroker I run is very happy at 70 mph and 3100 rpm on the highway. Trans is a th400 with a 25/2800 stall and 3.23 posi rear. I don’t even use the radio just listen to the sbc sing is music for me!
     
    dave@ztech likes this.
  10. upcwhiting

    upcwhiting New Member

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    This thread is kind of interesting. I don't think you're going to notice much difference changing from 3.42s to 3.73s. Personally I feel it's a waste of money if you're expecting to actually feel an increase in performance. Going from 3.42s to 4.10s? Yes, you probably will. I went from 3.31s to 3.55s (in my '08 Mustang GT) and didn't notice any difference at all. The next time I went from the 3.55s to 3.73s. Again, no noticeable difference. I went from 3.08s to 3.73s in my '68 Nova SS but I don't have it back on the road yet so I can't relate any change in performance. My high school car had 5.13s with a 4 speed and G60-14 tires, but I never left town so it wasn't a big deal. You did a lot of shifting and it put a '70 LS-5 Chevelle on the trailer one night. That was with a 283 at 3000 lbs. Don't most factory GM cars with an OD trans come with 3.73 gears? Just my thoughts. And in case you're wondering I do have 2 Camaros, a 70 and a 72.
     

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