Schurters LT1

iTrader: (2)

Car is an M6
28" tire
3800lbs with me in it
close to 700rwhp
7200 rpm red line
i am thinking 3:73

the 681 was @6600rpm on the dyno and you can see it's still going north, i was thinking of trying to pull it to 7000rpm

i think the car should go close to 140mpr in the 1/4

what would be right gear to put in the car for the track....

thanks

Schurters LT1

iTrader: (2)

nput Parameters Are the Following:

* Top Speed MPH = 140
* Tire Diameter (Inches) = 28.00
* Peak Horsepower RPM = 6500

Computation Results:
# Computed Best Differential Ratio is 3.87 to 1
# Computed Maximum Differential Ratio is 4.33 to 1

would this be right

ABeasst

iTrader: (5)

not gonna go 140 in the 1/4 with 700hp and 3800#. closer to 135

Schurters LT1

iTrader: (2)

Ok so what would you think then ???

ABeasst

iTrader: (5)

honestly a 4.10 would get you to 135 and some room to grow to 140 in the future with more power.

Schurters LT1

iTrader: (2)

with 700rwhp this would only put me at 135mph in the 1/4 ????

ABeasst

iTrader: (5)

700RWHP should get you around 135 in the 1/4 and with a 4.10 you would hit 135 around 6600 and 140 around 6900. Obviously these are only estimates there are no guarantees.

Schurters LT1

iTrader: (2)

how do you fig this out ????

ABeasst

iTrader: (5)

I used this spreadsheet for an estimated MPH http://www.forcedinductions.com/etcalculator.htm but every car is different so its just a estimate.

Schurters LT1

iTrader: (2)

that thing is a pan it the *** ???? what are you putting in the box's ??

lt1_fool

Hey Schurters, pleast post your dyno and transmission.

EDIT: Saw you tire size bud. =)

Schurters LT1

iTrader: (2)

3800lbs
M6
28"
686rwhp

lt1_fool

Well, since the software I wrote uses your true dyno graph as the input, a dyno graph would help out tremendously, but taking a guess at a general graph for 681rwhp @ 6900rpm & 590ft-lbs @ 5000rpm I got these results. This is all assuming near perfect traction, standard elevation/temp, and no wind, slicks with 4% tire growth, and good shifting, etc.

3.73's: 10.15 @ 137.24 / 5966 rpm / 4th gear
4.10's: 10.10 @ 139.13 / 6645 rpm / 4th gear

lt1_fool

Oh ya, also assuming the dyno was on a dynojet.

Schurters LT1

iTrader: (2)

cool....

the 686 was @ 6600rpm and yes a dynojet

NA$TY-TA

iTrader: (21)

Id say 3.73's man....... better of both. Easier on the street still and with a 28" tall Tire @ 7K RPM's you can run up to 150MPH in the 1/4......
The weight of your car is hurting your ET... oe will hurt it when ya hit the track.....

Kyle

RealQuick

iTrader: (14)

3.73 or 3.90 would be my pic (if 3.90 is available)

Give yourself some room to grow like Kyle said... you may want to up the boost or add a small shot later.