« previous next »
Pages: [1] 2 3 4   Go Down

Author Topic: Power+weight+time.  (Read 19963 times)

Offline gtpete

  • Newbie
  • *
  • Posts: 25
    • View Profile
  • Your Best Time: none
  • Your Engine: none
  • Your Track: Santa Pod
  • Your Vehicle: FED
  • General Location: Northamptonshire
Power+weight+time.
« on: January 09, 2019, 11:59:58 PM »
Hello everybody. Just to help me along with my build and give me something to look forward to. Can I make a pole of your FED weight and what 1/4 times you run. Thanks in advance Pete.
Logged

dreracecar

  • Guest
Re: Power+weight+time.
« Reply #1 on: January 10, 2019, 08:32:12 AM »
Weight divided by ET3 (cubed)  X 197.14 = HP

 1650# / 343 (7x7x7) = 4.81
 4.81 X 197.14 = 948 HP

  Rough terms is that is how much HP is needed to move that weight 1320' in that amount of time
Logged

Offline gtpete

  • Newbie
  • *
  • Posts: 25
    • View Profile
  • Your Best Time: none
  • Your Engine: none
  • Your Track: Santa Pod
  • Your Vehicle: FED
  • General Location: Northamptonshire
Re: Power+weight+time.
« Reply #2 on: January 10, 2019, 09:40:28 AM »
I'm ok with the maths its just some real world numbers i'm after.
Logged

dreracecar

  • Guest
Re: Power+weight+time.
« Reply #3 on: January 10, 2019, 04:19:22 PM »
My car weighs with driver 1650# and I run in 7.0Pro index class and usually hit the number. I dont have the time or money for dyno time to get HP figures, And that about how "real world" I get
Logged

Offline retroboy

  • Full Member
  • ***
  • Posts: 221
    • View Profile
  • Your Track: Whyalla
  • Your Vehicle: FED
Re: Power+weight+time.
« Reply #4 on: January 10, 2019, 06:58:50 PM »
Not real world but the Wallace racing calculators have a simple calculator on their web page


Wallace Racing - 1/8th Mile ET/MPH/HP Calculator

Cheers
Logged

Offline gtpete

  • Newbie
  • *
  • Posts: 25
    • View Profile
  • Your Best Time: none
  • Your Engine: none
  • Your Track: Santa Pod
  • Your Vehicle: FED
  • General Location: Northamptonshire
Re: Power+weight+time.
« Reply #5 on: January 10, 2019, 11:47:59 PM »
Thanks DRE that's what I'm after. My 140" FED weighs ### with this much horsepower and I run these times ###. Thanks again.
Logged

Offline noslin

  • Sr. Member
  • ****
  • Posts: 259
    • View Profile
  • Your Best Time: 0.00
  • Your Engine: none
  • Your Track: none
  • Your Vehicle: none
  • General Location: west coast
Re: Power+weight+time.
« Reply #6 on: January 11, 2019, 05:11:43 PM »
need mph and weight for HP on the dream wheel. mph is the key.
Logged

Offline gtpete

  • Newbie
  • *
  • Posts: 25
    • View Profile
  • Your Best Time: none
  • Your Engine: none
  • Your Track: Santa Pod
  • Your Vehicle: FED
  • General Location: Northamptonshire
Re: Power+weight+time.
« Reply #7 on: January 17, 2019, 01:07:59 PM »
Nobody else with the specs of their FED ??
Logged

Offline Paul New

  • Hero Member
  • *****
  • Posts: 743
    • View Profile
  • Your Best Time: 6.47 @ 214 MPH SBC
  • Your Engine: 387" SBC
  • Your Track: Woodburn Dragstrip
  • Your Vehicle: 2005 FED
Re: Power+weight+time.
« Reply #8 on: January 17, 2019, 01:17:54 PM »
1800lbs w/driver 387” SBC 6.47 214mph
Logged

Offline Curly1

  • Sr. Member
  • ****
  • Posts: 260
    • View Profile
    • AireTex Compressors
  • Your Best Time: 7.95 @ 167 1/4 mile
  • Your Track: Texas Motorplex
  • Your Vehicle: 125" Altered
Re: Power+weight+time.
« Reply #9 on: January 18, 2019, 09:33:24 AM »
4.92 @ 140 with 760 hp and 1800 lbs.
Logged

Offline gtpete

  • Newbie
  • *
  • Posts: 25
    • View Profile
  • Your Best Time: none
  • Your Engine: none
  • Your Track: Santa Pod
  • Your Vehicle: FED
  • General Location: Northamptonshire
Re: Power+weight+time.
« Reply #10 on: January 18, 2019, 10:24:33 AM »
That's some quick cars. Both 1800 lbs too. Thanks for the replies looking forward to some more  :)
Logged

Offline JrFuel Hayden

  • Hero Member
  • *****
  • Posts: 600
    • View Profile
    • Hayden Enterprises Speciality Wheels
  • Your Best Time: 6.02, 236 mph, 1/4 in 1973 Div 3 TF Champ
  • Your Engine: SBC, Alky, 403 ci, Best 6.99 @ 190 & 409 Hemi
  • Your Track: Bakersfield
  • Your Vehicle: 225" FED NHRA Heritage Jr Fuel
Re: Power+weight+time.
« Reply #11 on: January 19, 2019, 01:46:37 AM »
We race NHRA Heritage  JrFuel for 17 years same car was 200" WB when first built by Dave Tuttle in 1998, and we front half the chassis in 2011 when tried an early Hemi and went to 225", max WB for the class.
Car with driver weighs 1435 with the SBC, and 1500 with Hemi . We run mostly 7.00's in the 1/4, and 4.45's in the 1/8 at 153-155mph, and 1/4 speed is 186-190. Class limits are only pure alky, 12"wide tires , powerglide, all iron engine,  stack injectors all at 3 1/2 lb per CI. Our engine location is 48" from back of engine to center of rear axle. The cars being built lately are 55-60" out. CI limit for JF is 430, we run 409 on the Hemi, and 400 on the SBC., but some teams run 387 ci SBC. One option we have in JF is we can also race NHRA Comp Elim, in A/ND [JFA] or B/ND [ JFB]
Call if you have more ??'s 805-444-4489, Jon
Logged
Jon C. Hansen

Hayden Wheels

Offline George

  • Hero Member
  • *****
  • Posts: 515
    • View Profile
  • Your Vehicle: 1964 Mercury Comet Super Stock/ M automatic
  • General Location: Midwest USA
Re: Power+weight+time.
« Reply #12 on: January 19, 2019, 08:03:28 AM »
2011-2013 we ran a FED with SBC. Dynos numbers were  600 +. Car and driver were 1460#. Ran low 5s with good track and air in the 1/8th.
Logged

Offline Curly1

  • Sr. Member
  • ****
  • Posts: 260
    • View Profile
    • AireTex Compressors
  • Your Best Time: 7.95 @ 167 1/4 mile
  • Your Track: Texas Motorplex
  • Your Vehicle: 125" Altered
Re: Power+weight+time.
« Reply #13 on: January 19, 2019, 03:19:45 PM »
I would like for others in particular Jon Hayden to add front weights as I think it is critical to making these animals work. Mine was 1730 with 389 on front and simply was not hooking up. So it is back at chassis shop making a bunch of changes. We are moving weight back and changing engine angle from 2.7 down to .5 approx.
Logged

dreracecar

  • Guest
Re: Power+weight+time.
« Reply #14 on: January 19, 2019, 05:00:58 PM »
These days  Engine angle has zero affect unless you were way out of the park to begin with. Engine angle is the result of the relationship to how far the motor is out from the rear end to the front oil pan clearence. We are raising the front of the motor these days so that you dont tear up the diaper.  Building a new chassis right now, motors out 55" and the crank snout is 10" of the deck, I dont care what the motor angle is
Logged
Pages: [1] 2 3 4   Go Up
« previous next »