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Just curious

This is a discussion on Just curious within the General Help forums, part of the LSx Technical Help Section category; So here's my question... How much more horsepower/torque does it take for a car with 3.42's to out-accelerate a car ...

  1. #1
    Pathelogical Liar BlackLT1Z28's Avatar
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    Just curious

    So here's my question...
    How much more horsepower/torque does it take for a car with 3.42's to out-accelerate a car with 4.10's?

    Here's why I ask...
    I was out with my friend last night. We were in his 06 Mustang GT and it was my first time since he got his 4.10 gears installed. I just wanted to see if there was a difference, and there was. Definately pulled harder. Anyways, we were cruising around a little after midnight when we get passed by an LS1 Z28 with an old man driving. We pull up to a red light and I ask the guy if he had anything done to the LS1, and all he said was "Yeah" and turned away. I couldn't tell what he had, it was a sleeper...he was running stock exhaust and it was so quiet. So, the light turns green and the Z28 rolls about a car ahead of us, then they both hit it at the same time. My friend spun a little, but the Z stayed up with that 1 car length and then pulled another half before we shut down.
    Obviously, 4.10's have a mechanical advantage over 3.42's, which leads to my question. My friend's GT is a 5sp and I couldn't tell what the Z was, or even if it had gears also, but assuming it was a 6sp with 3.42's, how much more hp/tq would he have to produce to outrun 4.10's out of the hole? I think the Z had to have had a cam, because it was quiet and still had the stock catback, must have had other bolt-ons too.
    Note: My friend's GT has a dyno-tuned ~320RWHP on a mustang dyno...just for number's sake.
    Thanks, and sorry for the long post.
    Last edited by BlackLT1Z28; 05-01-2007 at 07:23 AM.

  2. #2
    Life in the Fast lane sunsetorangess's Avatar
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    Thats a very broad quesiton.....
    Your asking what the z would have too have inorder too outrun a mustang gt with some gears? I would have too say not much at all, even a stock z would take on a gt and still take a few lengths.
    If they were both standards then its drivers race also.
    In my opinion too many variables too even begin too guess.
    J
    2001 SS, Its not the car its the Driver that matters....

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    Cut another notch in the LS1's belt in a long line of Mustang notches.

  4. #4
    Pathelogical Liar BlackLT1Z28's Avatar
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    Well, my friend's GT also has longtubes, high-flow crossover, side exhaust, ram air intake, 4.10's, and obviously, the tune.
    And I assume the Z was running a stock catback because he had the stock rear pipes and stock tips. He could have swapped out the muffler but I couldn't tell. And in exception to the 1 car lead before they hit it, the Z only pulled maybe a half a car on top of that, so it was a pretty close race I think...

  5. #5
    Member Huskerz1's Avatar
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    The old man driving the Z probably had the "Old Man" cam. LOL Realistically, he probably had just a lid and tune. Oh and a LS6 intake if it was 01-02 Z. That and a 6 spd sounds to me all that is necessary to handle your buddy's GT. His exhaust probably sounds cool tho. All bark, no bite.

  6. #6
    Life in the Fast lane sunsetorangess's Avatar
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    Also if he had the stock tips, the chances are he had a stock exhaust system. I have never seen anyone replace there catback or even muffler and keep there stock tips on there.
    J

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    Senior Member mrr23's Avatar
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    dark bowling green
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    hp difference going from 3.23 to 4.10 in my car. auto trans. give you an idea of how much to add


  8. #8
    Senior Member SeVeReDiStOrTiOn's Avatar
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    Quote Originally Posted by Huskerz1 View Post
    His exhaust probably sounds cool tho. All bark, no bite.
    I wouldn't say that...those 3 valves can move compared to the 2 valve 99-04 gt's. 320rwhp on a stang dyno with headers,intake and a tune..it has some bite.

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    Come on now your comparing apples to oranges

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