I find this HP calculator, it may help a bit for all those people that will want to know there 1/4 mile time before going..

http://carrito.net/hp_calc.htm

hope it helps

I think this help, you put your weight, and your HP and they give you your 1/4 mile time... anyone?

 

good find

 

^^^ thanx, hope it helps people

 

about how heavy is an SS/SC

 

Its not very accurate. I tried it for a Z06 corvette, 3132 lbs, with 505 hp. It shows 11.27. The best best best drivers get like 11.5-11.7. You would need DRs to run 11.2. Then for a decently modded cobalt, 2800 lbs, 260 whp = 12.86!?!?

 

about 2900 lbs

 

the balt weights about 2900 + 260whp= 13.014799 ... to that add your weight, also that will be with perfect shifting// plus its just an estimate...

 

260 whp is a lot for a cobalt. Stage 2 is what 240ish?

Additionally - I'd say its 2900, plus your weight, plus about another 150 lbs of stereo, plastic and other assorted crap.

 

It is fun to use. But wasn't very accurate on my blown 92 mustang. Said I was a 13.5 and I pulled a best of 12.9 on street tires (and first time at the track). Granted my first run was a 13.7 lol. But the program shouldn't include driver retardedness-just car capability. Then again. Maybe the dyno I was on didn't give my car justice. Who knows..the whole thing is a crap shoot. But it is a blast to plug in the numbers. Hmm..Wonder what my 2.4 is capable of? Ok...switching websites now...

Ok.. I see it's a different caculator. I retract my statement

 

My SS/SC at 228whp and 3k lbs said a 13.75 in the 1/4........I doubt it.

 

2911 DRY!(cobalt) so figure in the liquids, and driver weight too... then it will be close. with my actual race weight, and hp, it came out within 3 tenths of my real time

 

this is not very accuerate because it does no account for gearing, torque, redline, tire size, traction, or drag

 

exactly wut i was thinking i mean it could be a little more accurate if they at least added torque in there but still for what it is its pretty close

 

Agreed. Very basic caculator. Never seen one that includes drag though.

 

its just an estimate,, to give you an idea of were your at...

 

hahahahaha at 10000 wheel hp a cobalt could run a 3.85

 

Acorrding to this I shoud be running almost a 13.00 flat right now. 254 WHP + 2900lbs = 13.116481673676222

Once I add the rest of the parts I have in my closet I will be running a 12.932425076455242

Does this thing account for traction, or more like the lack of???

 

Its a neat concept tho. Needs work but neat none the less.

 

Don't figure it at 2900 pounds, probably closer to 3200. Car should be 2991 according to most sources, add at least 150 for driver, thats average weight when figuring a person, and whatever crap you might have in the car, stuff in the glovebox, trunk, whatever. Full tank of gas= 80 pounds, so even that plays a part. At 3200, with my stock dyno# of 217, that sounds about right. Now, with i guess 245-250, thats mid-upper 13s, which I think is ok. 292hp gives me 12's, which is what i'm hoping for. Its a fun thing to play with actually.

 

I weighed my car last night... at a farmers market where they weight in trucks and semi's and with a full tank of gas and me (210lbs) with 2 12's in the trunk it weighed in at 2998 lbs

i mean this is a accurate scale...

 

I would say this website would be better to get a good HP estimate after running at the track. After all... all dynos are different, but a 1/4 mile is still a 1/4 mile

 

Huh?

2998 (the scales you tested on)
-210 (your weight)
2788
-50 (2 encased 12's?)
2738

Now if we subtract 1/2 tank of fuel (most car tests run a 1/2 tank of gas):

1/2 of 13.2 gall. = 6.6 gall
6.6 gall. fuel @ 6lbs./gall. = 40lbs.

2738
-40
2698lbs.

2698lbs.?

I' havn't seen a single test of an SC where it's test weight was less than 2911. There seems to be a 200+lb. discrepancy here. ???

(examples below from road tests)
Motor Trend 2959 lbs.
Car and Driver 2911-2936 lbs. (2 different tests)

Therefore, using our car's realistic 2950lbs., plus my 230lbs., equals 3180lbs. (1/2 tank fuel, no stuff added to/removed from the vehicle, etc.)

So plugging 3180 lbs. into that calculator shows I was making 223hp at the crank on my box stock SC when I raced the car new (I ran 14.87 1/4 mile)

That seems right ...

 

That market is keeping the farming man down.

 

Its not that far off. It has my Balt in at a 15.2 which is about where I'm running. If your getting Waaaaaaaay goofy numbers your putting in bad info.

But yeah its not perfect its an estimate.

 

yes. it just a fun estimate, nothing to BRAG about, if you want to really know go to the track..