1/4 Mile Calc

[Youngblood77]

I was tinkering around with the idea of keeping the 'ho, and with that, thoughts of turboing the ol' girl crossed my mind aswell. In the process, I came across a 1/4 mile calculator. Based on Ken's info on his cardomain, ( 3,260 lbs, 240 est. HP ) I tend to think the calculator's slightly on the slow side, but all-in-all, pretty accurate nonetheless. Have fun, -Eric

1/4 mile calc (http://www.fantasycars.com/derek/quartmile.html?lbs=3039&hp=170&submit=Get+Results)

[b-spot]

That HP 'estimate' is completely useless. A before and after dyno is the only thing that gives you numbers to throw in a calculator like this.

[jackal2000]

ken needs to dyno his car

[Redog]

Yes I do

[Youngblood77]

Ken probably does need to dyno the Redog, but using his numbers, the calc was only off by .2 on the 1/4 mile in reference to Ken's quickest run, and dead on in reference to Ken's "average" I don't think his HP estimate is off that much. Think about it: the headers alone are good for 30 horse from what we've read, and there's alot more than those headers helping her to breath. Not to mention the pullies, etc. etc. His estimate is probably alot closer than you think B.

[SweetNLow]

240hp????????? haha oh wow u must be kidding me....... id give him 215 tops and thats at the crank

[Youngblood77]

What did you think we were talking about? Wheel hp?

[eag182]

um...yea.

That calculators too ambiguous because it doesn't specific whether or not the HP is from the crank. And whenever I talk about HP I talk about whp, and I never tell people I have 170HP (car is stock).

[jackal2000]

yea my guess for ken is that he might have 185 at the wheels.

[eag182]

Yea I'd say thats accurate, going off of Wildmans dynos from a while back.

[b-spot]

Originally posted by Youngblood77@Dec 19 2005, 07:21 PM
What did you think we were talking about? Wheel hp?
Quoted post


Yeah I only deal with whp. The variance in drivetrain losses in cars is pretty big (especially awd vs rwd vs fwd) and it doesn't matter how much you have at the crank, it matters how much hits the road. Plus manufacturers numbers can be wack. For example, my car is rated at 205 at the crank. Most dyno it at 200-215 at the WHEELS. Same deal with SRT-4's. Some cars, like Rx-8's, dyno WAY below their manufactures numbers at the wheels.

[jackal2000]

Originally posted by eag182@Dec 20 2005, 12:42 PM
Yea I'd say thats accurate, going off of Wildmans dynos from a while back.
Quoted post

ya and 1WhiteAlero or whatever is his name is ran a 14.7 with 179whp

[pawzbear]

my dad has all these crazy computer programs.. one is supposed to give you stats like hp and junk by entering all these detailed complicated things about your car. yeh i dont understand it, its really in depth, but he says its a little off. but he wont dyno our firebird (our only car we mod...) he says its bad for them. he wants to track race it tho.

[jackal2000]

what your dad must mean is that stomping on the gas pedal is bad for your car which it is...if you do it all the time. but in no way is one dyno bad for it. usually on a dyno you get the car up to 2k rpm's then jump on the throttle. usually manual cars are dynoed in 4th gear.

[Youngblood77]

So, what's the percentage of "drivetrain power loss" on N bodies?

[b-spot]

Originally posted by Youngblood77@Dec 20 2005, 05:08 PM
So, what's the percentage of "drivetrain power loss" on N bodies?
Quoted post


Its different for manual/automatic 4cyl/automatic 6cyl

[eag182]

I think its around 18%

[pawzbear]

Originally posted by jackal2000@Dec 20 2005, 04:59 PM
what your dad must mean is that stomping on the gas pedal is bad for your car which it is...if you do it all the time. but in no way is one dyno bad for it. usually on a dyno you get the car up to 2k rpm's then jump on the throttle. usually manual cars are dynoed in 4th gear.
Quoted post


yeh um i have no clue, i dont try to challenge my dads mechanical knowledge... no one does. his employees are in awe of him. annnnd he babies that damn pontiac so much, and if he says a dyno would hurt it, god damn it will hurt it. lol.
but yeh i dunno my mech knowledge is close to zilch.

[AlbinoMonkeyRat]

Originally posted by b-spot+Dec 20 2005, 07:23 PM--><div class='quotetop'>QUOTE(b-spot @ Dec 20 2005, 07:23 PM)</div><div class='quotemain'><!--QuoteBegin-Youngblood77@Dec 20 2005, 05:08 PM
So, what's the percentage of "drivetrain power loss" on N bodies?
Quoted post


Its different for manual/automatic 4cyl/automatic 6cyl
Quoted post
[/b][/quote]
true, but I think I heard the average across all three setups is 25%