1/4 Mile Time Calculator

[Pal]

Here's a calculator for 1/4 mile times. not sure how accurate it is but I think it is pretty close. conversion is 2.205lbs = 1 kg

so a skyline being 1390kg is 3064lbs

http://www.robrobinette.com/et.htm

[noise]

broken

[Swiper the Fox]

  Pal said:

Here's a calculator for 1/4 mile times. not sure how accurate it is but I think it is pretty close. conversion is 2.205lbs = 1 kg

so a skyline being 1390kg is 3064lbs

http://www.robrobinette.com/et.htm

not bad...pretty accurate

[N I B]

I just tryed a few knowen cars and found this a tad slow like Sharons GTR 338rwhp, the program says 12.44 the car ran 12.0,The calculator only uses peak power not average power.

Good basic guide.

[Bunta]

I was hoping for anything under 12.5 with my Rb25 R32

But this says a r32 with 260rwkw can do 11.3!!!

But due to my driving I am still hoping for a 12.5 lol

[rev210]

kwinanna motorplex is a good 1/4 mile calculator.

These calculators are quite useless.....wait..... they are good for starting useless debates and arguments.

If you are serious about drag racing the information needs to be collected at the track, the actual track you want to race on and do well.

[Hicks]

Ha ha! Awesome, 11.12...

[Marlin]

Whats the KW - HP ratio? I've forgotten? My old 32 GTR made 303RWKW last time I raced it, and it ran 11.135 @ 128mph. Isn't that about 430 rwhp? The calc said I needed 491 rwhp? Am I just a hell of a driver or what????!!!!!

[2rismo]

  Marlin said:

Whats the KW - HP ratio? I've forgotten? My old 32 GTR made 303RWKW last time I raced it, and it ran 11.135 @ 128mph. Isn't that about 430 rwhp? The calc said I needed 491 rwhp? Am I just a hell of a driver or what????!!!!!

406.02hp - lets say you lose that much through the drivetrain - your calc isnt that bad.

[2rismo]

Forgot to add that most calculators are at the engine. Most BASIC 1/4 mile calculators that use rwhp assume a % drivetrain loss which is a really bad thing.

Adrian

[Marlin]

  2rismo said:

Forgot to add that most calculators are at the engine. Most BASIC 1/4 mile calculators that use rwhp assume a % drivetrain loss which is a really bad thing.

Adrian

??? It states: "This calculator esitmates your quarter mile elapsed time (ET) when given the weight of the car and flywheel or wheel horsepower. A 17% driveline loss is assumed for flywheel HP."

I still reckon it's me!

[HypeR33]

  Marlin said:

Whats the KW - HP ratio? I've forgotten? My old 32 GTR made 303RWKW last time I raced it, and it ran 11.135 @ 128mph. Isn't that about 430 rwhp? The calc said I needed 491 rwhp? Am I just a hell of a driver or what????!!!!!

1 hp is 0.74569 kw

so according to the calc...I could do a 10.6 with 500rwhp!!!! Now just have to find 500rwhp from somewhere

[2rismo]

Just a note: You dont lose a fixed % through the drivetrain in ANY circumstance. The same drivetrain will lose say, 80hp with a 300hp engine as it will lose 80hp with a 500hp engine.

You don't magically get a drivetrain that eats more energy from the process.

So while 17% might work for your car NOW, if you increase the power from your engine by 200hp, the 17% wont apply.

Adrian

[NXTIME]

Very true. Too many people just add a magical % figure to their chassis dyno reading and overstate their engine's crank HP. The figure should be virtually static.

[MspecR33]

Car weight: 3064lb

RWHP: 199.4

Estimated quarter mile time: 14.48 seconds

Actual quarter mile time: 14.3 secofairly acurate

[Pal]

you should be quicker than that mspecR33.

i got 190rwhp and run a 14.08 with a bad start.

and guys, this calculator is only a guide

Edited April 18, 2006 by Pal

[N I B]

Most experts state that MPH is the guide to HP v Weight not ET.

Morosso use MPH and it seems very close.

[SirSkyline]

Heres another one http://www.turbofast.com.au/javacalc.html

[noise]

My 265.5RWHP GTT can run 13.16 apparently.

[Nizmo]

13.43 it said for my car - which is dead bang on what my cars gotten.