4.10 VS 4.30 - 3.73s too slow

Discussion in '96-04 - 4V Specific' started by Witzy0070, Apr 9, 2015.

  1. Witzy0070

    Witzy0070 Active Member

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    I currently have 1996 Cobra 4V with a 75 shot of nitrous and a Vortech pushing 12 pounds. After driving for a few months I have grown weary of the amount of time it takes my 3.73s to get me into my power band. I have been reading all over Google and haven't come up with a conclusion... I rarely drive on the freeway so revving isn't of much concern. I don't give a damn about gas, I have a high power V8. I am worried 4.10s might not be as big as a difference from 3.73s as I'd like. My car feels like a dog off the line for the power it makes. If a centri builds boost with RPM...

    I really don't know.
     
  2. Witzy0070

    Witzy0070 Active Member

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    I feel I should also add I have Torsen racing 8.8 diff and Moser 31s.
     
  3. Sinned83

    Sinned83 Well-Known Member

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    3.73's to 4.10 isn't to noticeable. Our 4v's love the gear go big.
     
  4. Witzy0070

    Witzy0070 Active Member

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    I am trying not to fear the gear. After being in my buddies 500WHP STI and watching how quickly that ate gear shifts I might be inclined to go with the 4.30s.
     
  5. Sinned83

    Sinned83 Well-Known Member

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    I've heard of guys doing 4.56's which seems like a lot for a SC'd car tho
     
  6. Witzy0070

    Witzy0070 Active Member

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    That's too steep for me, I am thinking for 4.30s.
     
  7. 96blak54

    96blak54 Legend

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    For an engine driving a centrifugal it only makes sense to up the gear just so the engine doesnt struggle to get to its power band. 4.30!
     
  8. Witzy0070

    Witzy0070 Active Member

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    Another vote for 4.30s with some info!
     
  9. kb1982

    kb1982 Active Member

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    You get too much gear in it, and as soon as the boost comes on it may make the tires go up in smoke. My 95 is lazy until the boost comes on due to its low compression ratio, but with 4.10s, it will scratch the tires about 15 feet after shifting to 4th gear. You may fix one problem with the deeper gears, just to have another one, traction.
     
  10. Witzy0070

    Witzy0070 Active Member

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    I was thinking the same thing, I hear you. I was thinking of throwing on a set of Mickey Thompson ET street radials on. My current tires are meh.
     
  11. castine917

    castine917 Well-Known Member

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    You have 3 high rpm factors. Nitrous, centrifugal blower, 4 valve. Go 4.30
     
  12. Witzy0070

    Witzy0070 Active Member

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    After doing homework and talking to my tuner I am going with 4.30 gears. Thanks guys.
     
  13. SnakeMedic

    SnakeMedic Member

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    What size wheels/tires are you running? My Vortech only hits 8lbs of boost and with the stock gears (I think) I still spin like crazy on 315s. Really interested in this since I plan on going big with the gears as well. My initial thought was 4.10s. You might change my mind!!
     
  14. Witzy0070

    Witzy0070 Active Member

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    I am running 18" wheels with 4.30 gears for a few weeks now. Additionally I am running a 2.87 pulley, so somewhere near 14 psi. When the nitrous hits it's over.
     
  15. SnakeMedic

    SnakeMedic Member

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    Oh wow. That is insane. What Vortech do you have? What series tires? I have 315s.
     
  16. Witzy0070

    Witzy0070 Active Member

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    I am running a Vortech V-1 S trim blower on a 2.87 pulley and I have Nitto NT555 tires in a 285/35/18.
     
  17. SnakeMedic

    SnakeMedic Member

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    Dayum. Same supercharger as me, but I have the standard pulley.

    So, how does it drive now? Without nitrous how does it hook? With my setup I get some pretty good wheelspin in 1st and 2nd in the upper RPM range, from about 3500 up. Doesn't seem to slow it down too much, though.
     
  18. Witzy0070

    Witzy0070 Active Member

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    Depends how hard you floor it. First gear is pretty worthless, low RPM wise in second is a bit sideways, otherwise I feel planted. However, I am lowered on Koni coil overs, Torsen racing LSD, a beast of a torque arm, welded sub frame connectors, and some other goodies, so I don't think I am really an ideal candidate to base tire control off of. Additionally, I feel very confident with my car. In the top of third at full tilt a shot of nitrous will still break the tires loose. It's really that sudden burst of torque that gets it going.

    So to answer you question, I don't spin to the point of feeling like I need changes mechanically, more changes on my foot work. I enjoy the set up so far.
     
  19. SnakeMedic

    SnakeMedic Member

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    Oh sweet. That is exactly what I wanted to hear. I appreciate the info!!!
     
  20. Witzy0070

    Witzy0070 Active Member

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    You bet, always happy to answer questions. What forums are for.