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9" Rear Losing 30HP?

This is a discussion on 9" Rear Losing 30HP? within the Drivetrain forums, part of the LSx Technical Help Section category; Originally Posted by SSwt00SS that is the funniest thing i have ever read on this site... let's clear up a ...

  1. #21
    2 SS's are better than 1 Jays00ss's Avatar
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    Quote Originally Posted by SSwt00SS View Post
    that is the funniest thing i have ever read on this site...

    let's clear up a few things for you...


    a person with a 9" and 4.10 gears will show a lower loss of rwhp than a person running the same setup but using 4.30 gears...


    See double whammy for me I have a 9" and 4.30 gears with 35 spline axles. I must have lost 35-40 rwhp. AGH!!!!!!!!!

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    M6 King Hot Black Trans-Am's Avatar
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    Quote Originally Posted by Jays00ss View Post
    See double whammy for me I have a 9" and 4.30 gears with 35 spline axles. I must have lost 35-40 rwhp. AGH!!!!!!!!!
    Dude, I recommend you getting a 10 bolt asap. Need to boost the dyno numbers like now.

  3. #23
    Make real real sure Johns00Z28's Avatar
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    Do the amount of axle splines have any affect on performance or economy?

  4. #24
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    Read this. I've seen a significant power loss first hand. For one the Moser was a good 50 pounds + heavier. And I have always heard it takes more power to turn a 9" than any other.How much power are you making and why do you think you need a stronger rear end? Just wondering that's all. You will also have to think about the added weight with the extra after market parts you will need as well. (torque arm,control arms, drive shaft, ect...) 3.5% of 400 is 15 hp not to mention how much hp it will take to move the weight.

    http://www.carcraft.com/techarticles...ord/index.html
    Last edited by Goldcuffs; 10-03-2008 at 07:08 PM.

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    where is the best place to get one?

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by Johns00Z28 View Post
    Do the amount of axle splines have any affect on performance or economy?
    Splines....not so much.

    Overall size and weight of the rearend and axles do though.

  7. #27
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    I have a 12 bolt with 3.73's and 31 spline axles.

    I really wish I had the 9", aluminum center section.

    Coolest thing's about the 9" are, they are tough bastards, and you can swap center sections out.

    The car came with the 12 bolt for me though, so I am not complaining at all!

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