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Gearing question for the solid roller guys

This is a discussion on Gearing question for the solid roller guys within the Nitrous forums, part of the LSx Technical Help Section category; For those of you running a solid roller setup with a high revving cam (4700-8000 power band), TH400, and running ...

  1. #1
    Senior Member cam02ss's Avatar
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    Gearing question for the solid roller guys

    For those of you running a solid roller setup with a high revving cam (4700-8000 power band), TH400, and running a larger shot (250, 300+) what gear do you use? Currently have 3.70s in my FAB9 with a 5,200 stall. I'm debating switching to 4.11s..thinking 4.30s will be too steep for the spray.

    Thanks

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    Senior Member bills98ta's Avatar
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    What RPM are you going through the traps at now with the 3.70's ???
    I have the 4.10's with a 4600 stall, and hitting 7100 at the traps, but I'm considering 3.90's when I add my 2'nd stage... I have other Buddy's that stepped back to the 3.70's...

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    Senior Member cam02ss's Avatar
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    I'm going to making my first passes with this setup over the next couple of weeks. I'm not changing anything until I see what I trap at. The rev limiter is set at 8k and I'll be shifting roughly 75-7600. 28 inch tire as well.

  4. #4
    Senior Member cam02ss's Avatar
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    Also, what trans do you have? TH400, glide,etc?

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    Senior Member bills98ta's Avatar
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    I'm still running the 4l60e, built up.. I don't have the manual valve body, so I program the the shift points.

  6. #6
    Senior Member cam02ss's Avatar
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    What size tire are you running...28"?

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    Senior Member bills98ta's Avatar
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    Yep, M/T DR's ... 28" ( 275/60-15 )
    I believe that's the tallest tire you will fit. Moser 12 bolt, with the LCA relocation brackets, extreme duty torque arm, anti-roll bar...

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    Senior Member cam02ss's Avatar
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    I currently have 325/50/15s but might switch to 315/60/15s if I change gears

  9. #9
    Senior Member bills98ta's Avatar
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    Here's a handy link for tire sizes.
    http://www.dakota-truck.net/TIRECALC/tirecalc.html
    The 315/60-15 looks to be a 30'' tire... I'd say, to tall.

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    Member LSXZ28's Avatar
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    You're gonna need to stay with the 3.70's... guess you got it tuned?

    GM EFI Tuner
    2002 Trans Am WS6 - 9.41@143mph, #3675, on pump gas and drag radials - sold

  11. #11
    Senior Member cam02ss's Avatar
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    Quote Originally Posted by bills98ta View Post
    Here's a handy link for tire sizes.
    http://www.dakota-truck.net/TIRECALC/tirecalc.html
    The 315/60-15 looks to be a 30'' tire... I'd say, to tall.
    Yea you're right. I talked to a couple people today about it. 30" is going to be too much.


    Quote Originally Posted by LSXZ28 View Post
    You're gonna need to stay with the 3.70's... guess you got it tuned?
    I know this guy....Bret!! How's it going? Yea but I think there's a lot left in it.

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    Member LSXZ28's Avatar
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    Quote Originally Posted by cam02ss View Post
    I know this guy....Bret!! How's it going? Yea but I think there's a lot left in it.
    What up! PM returned... Going pretty good.

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