« previous next »
Pages: [1]   Go Down

Author Topic: What is a good gear ratio for a 1600lb 400hp fed car is just for fun  (Read 11337 times)

Offline ricci32

  • Full Member
  • ***
  • Posts: 142
    • View Profile
  • Your Engine: sbc ,gas, 358cid
  • Your Track: Lebanon Valley
  • Your Vehicle: Vintage style FED
What is a good gear ratio for a 1600lb 400hp fed car is just for fun
« on: February 18, 2014, 06:10:33 AM »
 Looking to stay around 10 sec the car was used for 1/8 mile drags it has a 9" ford rear and worked turbo 350 trans motor is 400hp looking to have fun what would be a good ball park gear and keep rpm under 7k. car is 1600lbs
 
Logged

Offline ricci32

  • Full Member
  • ***
  • Posts: 142
    • View Profile
  • Your Engine: sbc ,gas, 358cid
  • Your Track: Lebanon Valley
  • Your Vehicle: Vintage style FED
Re: What is a good gear ratio for a 1600lb 400hp fed car is just for fun
« Reply #1 on: February 18, 2014, 06:11:28 AM »
Looking for a 1/4 mile gear.

Logged

Offline George

  • Hero Member
  • *****
  • Posts: 515
    • View Profile
  • Your Vehicle: 1964 Mercury Comet Super Stock/ M automatic
  • General Location: Midwest USA
Re: What is a good gear ratio for a 1600lb 400hp fed car is just for fun
« Reply #2 on: February 18, 2014, 07:18:11 AM »
Start with some online calculators. http://www.wallaceracing.com/Calculators.htm
Logged

Offline George

  • Hero Member
  • *****
  • Posts: 515
    • View Profile
  • Your Vehicle: 1964 Mercury Comet Super Stock/ M automatic
  • General Location: Midwest USA
Re: What is a good gear ratio for a 1600lb 400hp fed car is just for fun
« Reply #3 on: February 18, 2014, 07:19:47 AM »
Tire size and rim size will be needed.
« Last Edit: February 18, 2014, 08:50:56 AM by George »
Logged

Offline ricci32

  • Full Member
  • ***
  • Posts: 142
    • View Profile
  • Your Engine: sbc ,gas, 358cid
  • Your Track: Lebanon Valley
  • Your Vehicle: Vintage style FED
Re: What is a good gear ratio for a 1600lb 400hp fed car is just for fun
« Reply #4 on: February 18, 2014, 08:31:37 AM »
will check tire and wheel size tonight
Logged

Offline ricci32

  • Full Member
  • ***
  • Posts: 142
    • View Profile
  • Your Engine: sbc ,gas, 358cid
  • Your Track: Lebanon Valley
  • Your Vehicle: Vintage style FED
Re: What is a good gear ratio for a 1600lb 400hp fed car is just for fun
« Reply #5 on: February 18, 2014, 09:36:28 AM »
M&h 29.5  15x7 rim.
Logged

dreracecar

  • Guest
Re: What is a good gear ratio for a 1600lb 400hp fed car is just for fun
« Reply #6 on: February 18, 2014, 10:48:37 AM »
1600# w/ 400hp direct(no loss) ET is between 9.5-9.80
general assumtion is that its around 140-145 mph
30" tall tire @7000 running @ 145mph  would put you at a 4:30
Logged

Offline PSweeney

  • Full Member
  • ***
  • Posts: 231
    • View Profile
  • Your Track: Santa Pod
  • Your Vehicle: 138in SBC slingshot
Re: What is a good gear ratio for a 1600lb 400hp fed car is just for fun
« Reply #7 on: February 19, 2014, 09:19:16 AM »
I'd put wheelbase and trans braked box in the mix to.   A short car with a braked 3sp box on 4.30's will be lively.   Also depends what the useage of the car would be.  For a bracket car, I'd run taller ratio to tame the launch and give you the legs for a big end charge.   
Logged

dreracecar

  • Guest
Re: What is a good gear ratio for a 1600lb 400hp fed car is just for fun
« Reply #8 on: February 19, 2014, 09:47:08 AM »
Its a bracket car, dial in for consistecy and leave first ---hard to beat
Logged

Offline hotrod316

  • Sr. Member
  • ****
  • Posts: 352
    • View Profile
Re: What is a good gear ratio for a 1600lb 400hp fed car is just for fun
« Reply #9 on: February 19, 2014, 02:55:47 PM »
we run 33" x 10.5, 456, gear 8 3/4 rear, with a  sb chey very stock, hyd cam 6000 at the big end, 138 mph 9:50 on a 9.50 index. 1450 lbs race ready.
 33% pure fun 8) about 2 tens more
50% it will go FASTER OR BOOOOOOOOOOOOOOOM!!!!!!!! :D   
Logged

Offline ricci32

  • Full Member
  • ***
  • Posts: 142
    • View Profile
  • Your Engine: sbc ,gas, 358cid
  • Your Track: Lebanon Valley
  • Your Vehicle: Vintage style FED
Re: What is a good gear ratio for a 1600lb 400hp fed car is just for fun
« Reply #10 on: February 20, 2014, 03:18:24 AM »
thanks guys the car has a scat balanced rotating assembly and a hydraulic roller procomp aluminium heads. The car has a 120" wheelbase and is on 29.5 x8 tires the guy prior to me ran only 1/8 drags and shifted all three gears. I want to use the car for nostalgia events and don't want to get to crazy. car has a foot brake and currently launches in low.
 
Logged

Offline ss4

  • Jr. Member
  • **
  • Posts: 98
    • View Profile
  • Your Best Time: 5.42 @ 128 - 1/8th
  • Your Track: Northern Michigan Dragway
  • Your Vehicle: Worm Inc. 180 inch Front Engine Dragster
Re: What is a good gear ratio for a 1600lb 400hp fed car is just for fun
« Reply #11 on: November 21, 2014, 08:47:11 AM »
Quote from: hotrod316 on February 19, 2014, 02:55:47 PM
we run 33" x 10.5, 456, gear 8 3/4 rear, with a  sb chey very stock, hyd cam 6000 at the big end, 138 mph 9:50 on a 9.50 index. 1450 lbs race ready.
 33% pure fun 8) about 2 tens more
50% it will go FASTER OR BOOOOOOOOOOOOOOOM!!!!!!!! :D

hey there hotrod316   I am running the same combo but motor will turn 7000 to 7500.  any thoughts on gear for this one?  currently running 9.0 at 158 and 5200rpm
Logged
if you need to Hate target Laziness
Pages: [1]   Go Up
« previous next »