4.10 not worth it!!!

Discussion in 'SN95 4.6L Mustang Tech' started by Stang2003GT, Feb 25, 2006.


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  1. jimfitzgerald

    jimfitzgerald New Member

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    Here is one more issue to think about. A computer simulation model is a series of mathematical formulas. These formulas are only as good as the model developer's assumptions regarding relationships of cause and effect dependent and independent variables. Just as an example, if every formula was 90 percent accurate, and you only have 10 formulas, the model is only 35 percent accurate.
  2. Stang2003GT

    Stang2003GT Member

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    So what should I simulate. Dragstrip conditions? Drag radails?

    Also the math is 100% deadon were the simulation is unaccurate is in real life situtions vs the simulated environment.

    To learn more go here http://www.performancetrends.com/drag_racing_analyzer.htm

    Even if there were off by .1 the difference between the two gears is small.


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  3. jimfitzgerald

    jimfitzgerald New Member

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    No, the math is not 100 percent accurate. The arithmetic is 100 percent accurate, but the forumlas are somebodies attempt to state on-track performance in mathematical terms. These formulas are merely estimates.

    Edit: No computer simulation model is 100 percent accurate.
  4. Mike97gt

    Mike97gt it doe snot Mod Dude Founding Member

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    as jim pointed out the assumptions taken by the devloper will affect the outcome. plus i think if you decreased the amount of wheel spin factored in to make it more like a real 4.10 and 3.27 car then you would see the 4.10's shine.

    no traction untill the top of second is unrealistic.
  5. timeless2

    timeless2 Vi Veri Veni Versum Vicus Vici Admin Dude

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    All you have to do to disprove this idiosyncratic simulation is to run two identical (hell, even similar) cars down the strip.

    Anyone who believes that a 4.10:1 ratio is not going to pull harder & faster in a shorter time is smoking some serious grass.
  6. Barrier

    Barrier New Member

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    Quoted for assumed truth. :Teh-Win:
  7. Stang2003GT

    Stang2003GT Member

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    Once again all im talkin about is street performance. NO dragstrip and no DR's

    With those the 4.10 will be alot faster. I would post pics but I hit my 2 pic limit.
  8. jimfitzgerald

    jimfitzgerald New Member

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    I guess if you were racing on a frozen lake with stock tires, it's possible the 3.27's would win. It could be that the 4.10's would never get any traction. :shrug:
  9. blackfang

    blackfang Founding Member

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    Honestly, dont simulate anything. Go out and pay 15-20 bucks and run the car on the weekends and get some real results. Compare them to the other guys that are actually at the track. Then decide for yourself if you should get gears. Every Mod Mustang I have owned has had 4.10's or steeper from my GT to my Cobra's.
  10. Stang2003GT

    Stang2003GT Member

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    Not going to happend. Like im going to find a stock GT with 4.10 who would let me drive so I can do an acutal test.
  11. jimfitzgerald

    jimfitzgerald New Member

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    No, what he is saying is that you will get tired of getting your ass handed to you by every car with 4.10's. :nice:
  12. Stang2003GT

    Stang2003GT Member

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    Here is a run with 10.5 inch Drag radial at the Dragstrip.

    3.27 with DRs
    [​IMG]

    4.10 with DRs
    [​IMG]

    Attached Files:

  13. blackfang

    blackfang Founding Member

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    Thanks jim:nice:
  14. Barrier

    Barrier New Member

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    It's still vastly overestimating the amount of throttle you can lay down... no traction all throughout 1st with DRs? Highly unlikely unless you just suck at driving.
  15. Mike97gt

    Mike97gt it doe snot Mod Dude Founding Member

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    the "street" sim you did had WAY to much wheel spin. plus i need to see the manual for this sim. you have drivetrain loss set at 3 percent??? it should be more like 15 percent.

    but then you ran a stock car on drag radials and a 4.10 car on drag radials and it is still to slow?

    60 foot times are awfull for a drag radial car. 2.11 with the 3.27's and 1.98 with 4.10's

    it is still set up all wrong :(

    :lol: or driving on salty streets in new england in feb. 3.27's have the advantage then to.
  16. hotmustang331

    hotmustang331 New Member

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    Well my 02 is that 4.10s do help and WILL pull on the 3.27 car, simply becuase its in a better power range throughout the run.

    But people have a serious miss understanging on how much it takes to gain a tenth in the 1/4 outside of the launch. the 4.10s CAN be much faster in the 1/4, but its mainly due to getting the launch down.
    I know I can pull MUCH better 60's with my 3.73s on DRs vs 3.27s on the same DRs.

    As far as actual pull one the car is moving...its going to be a VERY VERY slow walk. No 4-5 lengths...and no 4-5 tenths with the same 60' and weather.


    The reason drag racers run steeper gears is bacause the run slicks...they can pull much better 60's with the steeper gears + the advatage of being higher in the RPMs after each shift.


    In short, 4.10s are faster...just not "My GT has mad tyte 4.10s and ill walk you 4-5 car lengths" lol.

    I have raced a simularly modded GT but with 3.27s. We stayed even the entire time, my gears didnt give me much of an advantage..even when i was shifting. (except of the 3-4 where I gained about 2 feet..but then it stopped) So even though I slammed 4th and was at a lower RPM than him (him in 3rd) he didnt pull on me...nore when he hit 4th and I was at a higher RPM in my 4th. We stayed even. Like I said its not a HUGE advantage. (BTW this was a LONG time ago..boltons)
  17. Stang2003GT

    Stang2003GT Member

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    I agree, the sim may not show times that the car would actual run but the time difference between the gears is real. I never said 4.10s werent slower just not worth $600-$750 on a stock car that will never hit the track.

    Look at my data- 4.10 on street tires doesnt do much but add DR's and a great driver and u will get your .2-.4 tents off your quarter.

    If 4.10 would take a stock car from a 14 to 13.6 on street tires then Ill shut up and retract all my data.

    Pro:
    Alot in the seat of the pants departmant
    Less strain on the motor
    With Drag radials ETs improve

    Con:
    $600-700
    Doesnt seem to be worth it for street useage
    RPM is way to high

    So everyone seem to want to prove me wrong. Were are the time slips at???
    How about some 3.27 vs 4.10 time slips?
  18. ilbehaved

    ilbehaved New Member

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    i have never seen 4 10's proven on street tires NOT DRAG RADIALS over 3 73 or any other gear.

    everyone knows 4 10's are faster on drag radials or slicks. but what about on the street on stock good years? i have 3 27's and when i hit second i lose the tires in 2nd gear for a bit. on stock tires. so i imagine when u hit 2nd on 4 10's u really lose 2nd for a bit more right?
  19. Barrier

    Barrier New Member

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    Umm... it's a bit hard to change out a differential (believe me we tried to crush the crush sleeve with a beast of an impact gun that looked like an M60 [complete with overhead handlebar] and sounded like a V8... I looked like I was getting shot with a machine gun when I was trying to hold the pinion assembly with a prybar.) AND drive about 1k miles to wear her in in the few hours you have allotted us.

    EDIT: Here's a picture of it next to a regular impact gun.

    [​IMG]
  20. Justin03GT

    Justin03GT New Member

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    yea, if you arent getting traction with drag radials then the sim is clearly flawed. i launch at 3500 on drag radials spraying n20 with 476rwtq and the car doesnt lose traction like the one you have in the sim.
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