How much do short gears & 4.23 RP affect top end..?

[Trond]

Oooppssss

Guess I should have read the "gearratios"-link :

"European gears are the same as US for all model years"

or your:

"On my 93 setup my 3rd tops out around 90"

I was just confused by SoS web-site stating the oposite...
But I guess Chris'll change that ASAP

[This message has been edited by Trond (edited 05 September 2002).]

 

[NormRD]

5inchfatlip:

I also ran with a camero SS from about 80-140. I ran with him once starting in 4th gear like you did and he pulled slowly on me. The next few times I started in 3rd and pulled on him even faster and had over a car length on him by the time we let off. My car is basically stock.

------------------
92 Red/Blk

[This message has been edited by NormRD (edited 05 September 2002).]

 

[1BADNSX]

Since my calculations are being referenced, these are my general opinions:

If you ¼ mile drag race or accelerate on the street from a full stop, short gears and R&P will improve your acceleration at slow speeds which help reduce your ET. With stock horsepower and weight, the following ¼ mile times can be used for comparison:

Stock 13.67
Short Gears 13.56
4.23 R&P 13.57
4.55 R&P 13.43
Short&4.23 13.48
Short&4.55 13.38

Due to the time it takes to cover a certain distance being proportional to the square-root of acceleration, it is very difficult to improve ¼ mile times. For instance, doubling the NSX’s acceleration (I wish) would only reduce the ¼ mile time by 29%. This means the above ¼ mile time improvements are pretty good.

If you do rolling start acceleration on the street, the short gears and/or R&P only provide driveability improvements (less gap between 1st and 2nd or better torque multiplication at some speeds mostly in 1st gear) and provide little and sometimes slower acceleration between any two road speeds. This is why short gears and/or R&P are road race track specific. One setup is faster at one track, but slower on another.

I take my car to road courses, but do not ¼ mile drag. Therefore, I haven’t spent one nickel on gears/R&P. JMO

Bob


[This message has been edited by 1BADNSX (edited 06 September 2002).]

 

[nsxtasy]

Originally posted by 1BADNSX:
Due to acceleration being proportional to the square-root of acceleration

Acceleration isn't proportional to the square root of acceleration. Acceleration is proportional to the square of the square root of acceleration. In fact, acceleration is the square of the square root of acceleration.