Drag times Vs Power
 

Hey guys,

Is there a rough guide for what quarter miles times you should/could run for a power to weight ratio?

eg, 200 horsepower(atw) per tonne gives you 14 second quarters
400 horsepower gives you 11 second quarter....(just an example)

Cheers,
Steve.

Yeah there are a few online calculators that can work it out. I'll see if I can find them.

Edit:

Sites like:
[url]http://www.turbofast.com.au/Drag.html[/url]
[url]http://www.hardcore50.com/members/calculators.htm[/url]

They only give a rough indication though (as there are so many factors in a time). I'm sure a google of 'drag calculator' will yield some more.

as a rule, the more power you have, you should get a better time : )

This has been proven wrong though from time to time.....Something to do with the driver...

[QUOTE]
Sites like:
[url]http://www.turbofast.com.au/Drag.html[/url]
[url]http://www.hardcore50.com/members/calculators.htm[/url][/QUOTE]

not a bad guide....

Remember weight in pounds though....

I just got an ET of 8.8 seconds!

LOL That's what I am doing wrong haha I got an ET of 9.1 haha. How much does your car weigh Brett?
11.89 now, It doesn't take into account the Joey factor though :)

Good links Kato, thanks.

i was using words like quarter mile and kw and wasnt getting squat from google.


so i should be pushing low 13s :)

cheers guys, Steve

what about gearing and ratios and such?

[QUOTE=PIGSTi]LOL That's what I am doing wrong haha I got an ET of 9.1 haha. How much does your car weigh Brett?
11.89 now, It doesn't take into account the Joey factor though :)[/QUOTE]

Not sure exactly on weight- i just put 1500kg (3300 pounds).

Jaron- how much HP you entering? I wouldn't have thought a bloke pushing an STI up the strip would be that quick? Sorry... :)

[QUOTE=BAS]
Jaron- how much HP you entering? I wouldn't have thought a bloke pushing an STI up the strip would be that quick? Sorry... :)[/QUOTE]

LOL Jaron you going to take that or is it just true? :D

it's also at the wheel horsepower not flywheel horsepower...

[QUOTE=BAS]Not sure exactly on weight- i just put 1500kg (3300 pounds).

Jaron- how much HP you entering? I wouldn't have thought a bloke pushing an STI up the strip would be that quick? Sorry... :)[/QUOTE]
hahaha want be pushing it next week (hopefully) mate :) That sounds like there could be a wager involved :D

Don't they also only calculate for rear wheel drives??

Are you guys adding in the weight of the driver as well? and what is the weight of an Pig STi?

It is only a guide and can only be treated as such.

Lot's of things to take into consideration such as tyres, gear ratio's, temperature, launch etc etc etc.

But I've found they are pretty close when you nail that good run.

Well my guide is

3300 pounds for the car plus 170 pounds for the driver = 3470 pounds

Power is 575 hp atw
TS got so far is= 134 mph.

Calculated

TS: 128 mph
ET: 10.6


So that must mean i have more hp... wohoo...

WAW starts this Wednesday the 3rd September.

Go down and get a REAL 1/4 mile time.

Then you can see how close the online calcs are.

Who is up for going on wednesday? Maybe a meet first then all go down together?

[QUOTE=PIGSTi]hahaha want be pushing it next week (hopefully) mate :) That sounds like there could be a wager involved :D[/QUOTE]


Must...resist... making...smartarse....comments!!!!



:p

[QUOTE=PIGSTi]hahaha want be pushing it next week (hopefully) mate :) That sounds like there could be a wager involved :D[/QUOTE]

Yeah i'm in. Never really had a crack at the drags so keen to see what time it does. Let us know when your cars going.

[QUOTE=BN01]Must...resist... making...smartarse....comments!!!!



:p[/QUOTE]
Look in the mirror Blair I am sure you'll come up with plenty :D

3rd week of Sept hopefully Brett

[QUOTE=PIGSTi]LOL That's what I am doing wrong haha I got an ET of 9.1 haha. How much does your car weigh Brett?
11.89 now, It doesn't take into account the Joey factor though :)[/QUOTE]
SO TRUE!

What a shame :(