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post #1 of 17 (permalink) Old 02-10-2010, 12:18 AM Thread Starter
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Hp guess

Does anyone know of a website that you can use to estimate your hp? Preferrably what you are gettin at the wheels... I know you can go to a dyno but I'm not really wanting to do that just yet...

Rockin out to the Farm report
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post #2 of 17 (permalink) Old 02-10-2010, 08:09 AM
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what kind of phone do you have? you could use dynolicious for the iphone or dynstorm for the blackberry storm. In my experience they are pretty accurate.

you can also use a quarter mile time/speed, and the weight of your car to calculate it roughly http://hpcalc.boostcontroller.com/

Last edited by [email protected]; 02-10-2010 at 08:14 AM.
post #3 of 17 (permalink) Old 02-10-2010, 08:28 AM
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Really? Im going to have to ask my buddy with the blackberry to take a ride with me.

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post #4 of 17 (permalink) Old 02-10-2010, 08:43 AM
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lol yeah i have a storm, and it's awesome. I've had kids tell me their civic is making 300 HP and been like yeah ok... we'll see.

Edit: i think the dynolicious app works on the ipod touch and ipad too because they have accelerometers.

Here's a review by garage419
http://www.youtube.com/watch?v=0-DFbJQbeSY


Last edited by [email protected]; 02-10-2010 at 12:43 PM.
post #5 of 17 (permalink) Old 03-30-2010, 04:11 PM
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thats awesome!!!

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post #6 of 17 (permalink) Old 03-30-2010, 04:36 PM
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Quote:
Originally Posted by 95xbird View Post
Really? Im going to have to ask my buddy with the blackberry to take a ride with me.
Here's some numbers for you:

Given

Weight = 3,800 (Same as my car)
E.T. = 13.113
Trap Speed = 106.40mph


Trap Method = 333.09 RWHP
Trap-speed Method = 357.24 RWHP


Quote:
The ET method
This method uses the weight of the car and the time it took that car to travel 1330 feet (┬╝ mile).

The formula is: hp = weight / (ET / 5.825)^3

The Trap-speed method
This method uses the weight of the car and the speed at which the car completed the quarter-mile run.

The formula is: hp = weight * (speed / 234)^3

Source: http://www.dsm.org/tools/calchp.htm

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post #7 of 17 (permalink) Old 03-30-2010, 05:51 PM
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Quote:
Originally Posted by Trunk Monkey View Post
Here's some numbers for you:

Given

Weight = 3,800 (Same as my car)
E.T. = 13.113
Trap Speed = 106.40mph


Trap Method = 333.09 RWHP
Trap-speed Method = 357.24 RWHP
but he was hitting the rev limiter, and he had a dead spot in his maf, so those might not be a true representation of his peak horsepower.
post #8 of 17 (permalink) Old 03-30-2010, 06:00 PM
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True.It still hits the rev limiter. Not really a dead spot in the MAF anymore but the car feels as if its losing power since I changed the plugs.

04 PI swap,SVO Supercharger 8-9 psi,Alcohol injection,39lbs Cobra injectors,XCal2-Walbro 255 LPH fuel pump,4.10 T-Lok,2003 4R70W built to withstand by RobertP,450hp JMOD,3800 circleD stall,trucool 4739 Trans Cooler,Dynotech 3.5 Driveshaft,70mm T/B,SCP Cold Air Intake,90mm LMAF,JBA headers,Magnaflow Midmount,No cats with 3inch piping,Vogtland 1.6inch drop,Cobra R's and xenon body kit.

Its slow, Really.
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post #9 of 17 (permalink) Old 03-30-2010, 07:28 PM
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Quote:
Originally Posted by 95xbird View Post
True.It still hits the rev limiter. Not really a dead spot in the MAF anymore but the car feels as if its losing power since I changed the plugs.
i meant the times he used to calculate your HP.

did you ever get that adapter for your maf? did it come with a gasket? That's weird about the plugs.
post #10 of 17 (permalink) Old 03-30-2010, 07:32 PM
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Yes i got the adapter. I was told a gasket was not necessary. And I was told to gap tyhe plugs at .38 and I did and it missfired like crazy. I check the gap of my old plugs and they were at .32. So I regapped them and its been better. Think I may need to close them up maybe .1 more tho.

And my aeroForce gauge has read 390ish hp. Which is obviously way off and measured off the flywheel anyway.

04 PI swap,SVO Supercharger 8-9 psi,Alcohol injection,39lbs Cobra injectors,XCal2-Walbro 255 LPH fuel pump,4.10 T-Lok,2003 4R70W built to withstand by RobertP,450hp JMOD,3800 circleD stall,trucool 4739 Trans Cooler,Dynotech 3.5 Driveshaft,70mm T/B,SCP Cold Air Intake,90mm LMAF,JBA headers,Magnaflow Midmount,No cats with 3inch piping,Vogtland 1.6inch drop,Cobra R's and xenon body kit.

Its slow, Really.
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post #11 of 17 (permalink) Old 03-30-2010, 10:27 PM
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Quote:
Originally Posted by Trunk Monkey View Post
Here's some numbers for you:

Given

Weight = 3,800 (Same as my car)
E.T. = 13.113
Trap Speed = 106.40mph


Trap Method = 333.09 RWHP
Trap-speed Method = 357.24 RWHP
Most HP calculators don't work well for the SC. On top of that, weight variations can be as much as 300 lbs....the race weight of my SC is 4000. That said, with only eight more rwhp than the big number (365 rwhp), my car runs 11.7-11.8 @ 116. With a low 13 second timeslip, I'd guess low 300's for rwhp.

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. . . . . . . . . -- 13.547s @ 101.01 mph, only w/ bolt-ons
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post #12 of 17 (permalink) Old 03-31-2010, 01:25 PM
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Why doesn't work well for the SC's if it's a simple calculated formula. Weight, speed & time is weight, speed & time..... Am I missing something??

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post #13 of 17 (permalink) Old 03-31-2010, 01:47 PM
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it only gives you peak HP, so a vehicle with a wider torque curve will run faster, but that doesn't mean it's peak HP is higher. it's not perfect.
post #14 of 17 (permalink) Old 03-31-2010, 02:10 PM
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ok.. i guess. kinda makes sense

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post #15 of 17 (permalink) Old 03-31-2010, 05:01 PM
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The calculation would be better for tell you the area under the curve, or the integral of your power curve.

If all else fails get a bigger hammer!

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post #16 of 17 (permalink) Old 03-31-2010, 08:21 PM
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The best HP calculator based on 1/4 mile weight and trap speed I found on the internet is at this link. Check it out.

http://www.modulardepot.com/?show=hpc

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post #17 of 17 (permalink) Old 03-31-2010, 09:29 PM
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Quote:
Originally Posted by Jimmy 2Coupes View Post
The best HP calculator based on 1/4 mile weight and trap speed I found on the internet is at this link. Check it out.

http://www.modulardepot.com/?show=hpc
Reads at least 30 rwhp high for my car and more like 60 rwhp since I didn't do anything to shed 300 lbs., go figure Historically, my car has always dyno'd lower than most people running similar numbers.

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"I'll either die owning this car or it will kill me."
'92 SC AOD -- 11.521s @ 116.748 mph, 2.0 AR power
. . . . . . . . . -- 13.547s @ 101.01 mph, only w/ bolt-ons
'95 SC 5spd -- All Stock, except 17" Simmons wheels.
'90 SC 35th Anny 5spd -- 3rd owner, 16k miles
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