Mph Vs Hp

[Cjmartz2k]

So some of you guys know I (and some others) love to get into big debates over american hp vs. aussie hp. I do think they can be different (but I will not accept one figure is "better" or more "accurate" than the other.) Many figures that are posted on here from around the world are shot down because they don't match the hp to mph figures you guys have. I have combed the dyno results threads and see no mph stats for a most of the posts. I was wondering if some of the experts could give some hp to mph ballpark figures for different body styles (or weights really). Examples........

R32 GTSt's are around 3000lb?

100mph-110mph = XXXrwhp'ish

110mph-120mph = XXXrwhp'ish

120mph-130mph = XXXrwhp'ish

R33 GTSt's are around 3300lb?

100mph-110mph = XXXrwhp'ish

110mph-120mph = XXXrwhp'ish

120mph-130mph = XXXrwhp'ish

R32 GTR's are around 3300lb?

100mph-110mph = XXXrwhp'ish

110mph-120mph = XXXrwhp'ish

120mph-130mph = XXXrwhp'ish

Also, how would AWD effect that equation? I think a R32 GTR weighs about the same as a R33 GTSt, correct? Would the same mph to hp figure be true? Obviously the E.T.'s are going to vary a lot with all cars depending on suspension, tires, driver, track, etc. For example, my best mph (with a Gtec) has been 127mph in a R32 GTSt. What kind of hp would you guess I'm making (o jeez, I just asked that question. Sorry )

Again, I'm just looking for broad ballpark estimates, not figures I could hold anybody too.

[The Dan]

Subscription post.

There is one thing I would like to point out that you have said about suspension, tyres and various other setups that will make the car perform differently, and we don't need an American to have an arguement...we have enough between ourselves lol,

and that is take one engine...Engine = 1000hp, put engine into car A. Car A has a 'no-expense-spared' and no stone unturned approach for the build up. Car A does 8.00 at 180mph. Pull engine out and Put in Car B with less spent and not as many improvements for a completely dedicated drag car, it is driven on the street. Car B does 10.00 at 165mph.

We have a couple of examples of this in Australia where engines are borrowed (and those figures above do not represent any particular one) and the times, and MPH will differ dramatically.

I still maintain that MPH is not an accurate indication of HP but moreso an accurate indication of a cars potential to do a better time and the fact that it's 'setup' may not be perfect.

[R33GOD]

If you are conserned with mph vs hp. go the extra step and put weight into it too.

Google 1/4 mile calculators from weight, et, and hp and it should give you a close enough answer.

letstorquebhp.com is a good site. You can select from 4wd, rwd to fwd too

Hope this helps

Edited April 24, 2009 by R33GOD

[Cjmartz2k]

I still maintain that MPH is not an accurate indication of HP but moreso an accurate indication of a cars potential to do a better time and the fact that it's 'setup' may not be perfect.

I would completly agree with that. Example, my times/mph are on drift type Cusco suspension, a factory viscous, 275/40R17 drag radials, and NOT on a prepped track (or any "track" for that matter ). I think with a better drag set up (and maybe a driver mod), I would not only have much better E.T.'s, but also a higher mph. I spin completly through 1st and 2nd gears. Glad you like the idea of the thread too I was worried it would be recieved as a "how much hp do I have?" post.

Also, R33god if you'll notice I did specify in the post weight (via chassis type) was a must for info.

[R33GOD]

yep yep.

[R31Nismoid]

If you are conserned with mph vs hp. go the extra step and put weight into it too.

Google 1/4 mile calculators from weight, et, and hp and it should give you a close enough answer.

letstorquebhp.com is a good site. You can select from 4wd, rwd to fwd too

Hope this helps

Im suspect about those to be honest as sometimes they say my car should have made 250rwkw to run 110mph, but i know thats not right

For the record i've run the following:

1480kg (3280lb) - i weight in @ 80kg's

220rwkw (296rwhp)

110mph

From what ive understand, thats pretty much spot on the money

[R31Nismoid]

And also - 10mph is a fairly big difference when your talking rwhp.

100mph and 110mph require very differeny power outputs

[Guilt-Toy]

500rwhp - 131mph

[R33GOD]

yea i know the performance calc's arent right but for a rough idea there pretty good.

with my gtr and 220ish rwk i ran a 12.6 @ 109.3 mph

[The Dan]

yea i know the performance calc's arent right but for a rough idea there pretty good.

with my gtr and 220ish rwk i ran a 12.6 @ 109.3 mph

Yeah and I did a 13.6 @ 109.6 mph with 260rwkw in a 32 GTST.

[l0WRB]

i ran 115mph with 240rwkw if that helps.

[SilverCal]

There is alot of variables that go with each persons car, so i think it would be a good idea to state not only what power and weight of car, but also what tyres and sizes along with ratio of diffs ect. Idealy to build up a diary of info it would be best to use one car,one dyno and one track and driver also performing mods as you go i would think, but im sure you could get some rough power figures v mph

Edited April 24, 2009 by SilverCal

[Cjmartz2k]

I know you can usually tell from avatars or screen names, but just to get people in the habit, make sure you post body type and/or weight if known. I don't think we need wheel size and gears and stuff. To much clutter for ballpark figures.

Keep it coming guys, good stuff. Maybe what type of dyno used also?

Edited April 24, 2009 by Cjmartz2k

[R31Nismoid]

While various things play a part, you can still get a very good idea of where a setup 'should' be roughly with either ET or MPH if you know what car/weight and so on.

Street rubber tends to let the MPH increase a tad, where stickier seems to lower it a bit because you get to the end sooner (due to a nice low 60ft)

Recent case with R33 GTR kid, his MPH was very low for the power he had, turns out he didn't actually have that power due to a leak somewhere and less boost/power that he didnt know about.

So there is very much good merit too it

Yeah and I did a 13.6 @ 109.6 mph with 260rwkw in a 32 GTST.

260rwkw in such a light car would be good for a 115+mph, and deep into the 12s if you keep at it!

[VB-]

yeah mph doesnt seem to get effect greatly by tyres/ratios/60ft time. hp vs weight, you should get pretty damn close to the mph regardless of setup, unless your talking about something rediculous that you have to pedal the whole way down the 1/4

edit - refer to morosso calculator for what your car 'should' run

Edited April 24, 2009 by VB-

[SirRacer]

Im 11.9 @ 117mph on slicks in a car with me that would weigh 1400kgs. 310kws at the wheels

Edited April 24, 2009 by SirRacer

[MBS206]

Also take into effect power curve...

Really, it's the area under the torque curve that gets you down the strip quickest...

500RWHP Dyno queens are CONSTANTLY shown up on the strip by 300RWHP STREET cars... Purely, as the 500RWHP car has the worlds shittest power delivery...

[unique1]

Also take into effect power curve...

Really, it's the area under the torque curve that gets you down the strip quickest...

500RWHP Dyno queens are CONSTANTLY shown up on the strip by 300RWHP STREET cars... Purely, as the 500RWHP car has the worlds shittest power delivery...

A laggy motor will show zero lag if launched hard enough at drags and 99% of them wont drop boost between gears either (unless its something that doesnt come on till 6000rpm etc). Maybe a 5th gear roll on yer but from standing start no chance.

I run a t04z and car is hopeless below 4k rpm but at the drags it launches like a rocket and not one hint of lag and the time refects that. Maybe running a gt47 or twin gt3540s or something, but not a 500hp car which is gt35 or t04z territory.

mine weighs 1750kg and does 124.6mph, dyno shows 560rwhp.

Edited April 24, 2009 by unique1

[PM-R33]

What car? Going by weight, R33 GTR?

[DCIEVE]

pm-r33, neg its a stagea

1360kg + me (80kg) ran 121mph with dyno figures ranging from 360rwhp to 400 depending on dyno.