Tech Equations

jasonlitka  Apr 3 2006 - 10:33am   

The following equations and rules apply only to 4-cycle engines powered by pump gasoline. The equations have been simplified for ease of understanding. Answers will approximate, but generally close enough for use as a guideline.


It is recommended that you round your result to the nearest hundreth, ie. 4.118325 = 4.12

Gear Ratio= Rear Axle ratio multiplied by Transmission gear ratio. (Tranny list below) Ex: 4.11*1=4.11 (rear axle=4.11) (1=1:1, fourth gear in some trannies.)

Tire Radius= Distance, in inches, from the center of the tire to the ground.

MPH

Tire Radius RPM Rear End Ratio Transmission Gear Ratio =MPH

RPM

Rear End Ratio Transmission Gear Ratio MPH Tire Radius =RPM

Calculated Gear Ratio (Trans. gear multiplied by rear end gear)

Tire Radius RPM MPH =Gear Ratio

Transmission Gear (relative to variables of calculated gear ratio equation)

Calculated Gear Ratio Rear end ratio =Transmission gear ratio

Rear end gear (relative to variables of calculated gear ratio equation)

Calculated gear ratio Transmission gear =Rear end gear

Tire Radius

MPH Rear End Ratio Transmission Gear Ratio RPM =Tire Radius

Transmission Engine code 1st 2nd 3rd 4th 5th
1982 TH-200C All 2.74 1.57 1.00
 
1982 4-sp Muncie LQ8/LQ9 3.50 2.48 1.66 1.00
  LC1 3.60 2.48 1.66 1.00
  LG4 3.42 2.28 1.45 1.00
  LU5 2.88 1.91 1.33 1.00
 
1983 TH-200C LQ8/LQ9 2.74 1.57 1.00
  LC1 2.74 1.57 1.00
 
1983 TH-700R4 All 3.06 1.63 1.00 .70
 
1983 4-sp Muncie LQ8/LQ9 3.50 2.48 1.66 1.00
 
1983 5-sp Warner Gear LQ8/LQ9 3.50 2.14 1.36 1.00 .73
  LC1 3.50 2.14 1.36 1.00 .73
  LG4 2.95 1.94 1.34 1.00 .73
 
1984 TH-700R4 LQ9 3.06 1.63 1.00 .70
  LC1 3.06 1.63 1.00 .70
  LG4 3.06 1.63 1.00 .70
  L69-HO 3.06 1.63 1.00 .70
 
1984 4-sp Muncie LQ9 3.50 2.48 1.66 1.00
 
1984 5-sp Warner Gear LQ9 3.76 2.18 1.42 1.00 .72
  LC1 3.50 2.14 1.39 1.00 .78
  LG4 2.95 1.94 1.34 1.00 .73
  L69-HO 2.95 1.94 1.34 1.00 .73
 
1985 TH-700R4 ALL 3.06 1.63 1.00 .70
 
1985 5-sp Warner Gear LQ9 3.76 2.18 1.42 1.00 .72
  LB8 4.03 2.37 1.50 1.00 .76
  LG4 2.95 1.94 1.34 1.00 .63
  L69-HO 2.95 1.94 1.34 1.00 .63
 
1986 TH-700R4 ALL 3.06 1.63 1.00 .70
 
1986 5-sp Warner Gear LQ9 3.76 2.18 1.42 1.00 .86
  LB8 3.50 2.14 1.36 1.00 .78
  LG4 2.95 1.94 1.34 1.00 .63
  LG4 3.35 1.93 1.29 1.00 .63
  L69-HO 2.95 1.94 1.34 1.00 .63
  L69-HO 3.35 1.93 1.29 1.00 .61
 
1987 TH-700R4 ALL 3.06 1.63 1.00 .70
 
1987 5-sp Warner Gear LB8 4.03 2.37 1.50 1.00 .76
  LG4 2.95 1.94 1.34 1.00 .63
  LB9 2.95 1.94 1.34 1.00 .63
  LB9 2.95 1.94 1.34 1.00 .73
 
1988 TH-700R4 ALL 3.06 1.63 1.00 .70
 
1988 5-sp Warner Gear LB8 4.03 2.37 1.50 1.00 .76
  LO3 2.95 1.94 1.34 1.00 .63
  LB9 2.95 1.94 1.34 1.00 .73
 
1989-1992 Not available yet, but here are a couple that are belived to be correct.
 
1992 T5   2.68 1.80 1.31 1.00 .75
 
1991 T5 LO3 2.95 1.94 1.34 1.00 .63
 
T5 TPI Induction 2.75 1.94 1.34 1.00 .74
 
4L60-E   3.06 1.62 1.00 .70
 
 
Navigation


Advertisement



Who's online
There are currently 16 users and 260 guests online.


   
Syndicate
Syndicate content