What is a typical final drive ratio?
What is a typical final drive ratio?
The engine speed always reduces by the final ratio to rotate the wheels by one turn. Similarly, in the 1st gear, whose ratio is 3.78, the engine needs to rotate 3.78 x 3.75 times more to turn the wheels by one rotation. Hence, this ratio is known as the final drive ratio.
What is final gear ratio?
Final Drive Ratio refers to the last set of gears that connect a vehicle’s engine to the driving axle. The ratio is the number used to represent how many times the transmission needs to rotate the drive shaft in order to rotate the tires once.
How do I choose my final gear ratio?
To find the ideal selection, multiply the final drive ratio by the redline speed in fourth gear (152 mph) and divide that by the top track speed (140 mph). This would yield a theoretical 3.33—which is close enough to the nearest available final drive ratio of 3.36:1.
What gears produce the final drive ratio?
A lower (taller) gear ratio provides a higher top speed, and a higher (shorter) gear ratio provides faster acceleration. . Besides the gears in the transmission, there is also a gear in the rear differential. This is known as the final drive, differential gear, Crown Wheel Pinion (CWP) or ring and pinion.
What’s the 5th gear ratio on a MGB?
There are several suppliers of this conversion. Of note is the fact that 5th gear ratio is virtually identical to the OD 4th of the standard MGB box. This in my opinion is ideal as 22 mph per 1000 rpm is high enough to give the economy and quietness, yet the engine still has enough torque to pull the ratio.
How big is the fuel tank on a MGB?
Live axle, hypoid bevel gears. Ratio: Manual 3.909:1, Auto 3.7:1 MPH/1000rpm: Manual top: 17.9, o/d: 22.1, Auto: 18.91 Grade of oil: SAE 90EP Capacity: 1.5 pints Cooling System Pressurised, thermostatic control, pump assisted. Capacity: 12 pints. Fuel Tank Capacity Approx. 12 gallons. Tank located at rear of car under boot floor. Body Styles
Where are the batteries located in a MGB?
The batteries are located behind the driver’s and passenger’s seats under an access panel in the floor over the rear axle. Axle ratio 3.909:1. Overall gear ratios 3.909:1 (overdrive 3.14:1), 5.369:1 (overdrive 4.31:1), 8.656:1, 14.214:1, reverse 18.588:1. Gearbox with synchromesh on 2nd 3rd and 4th gears only.
What are the specs of a Borg Warner MGB?
Borg-Warner Type 35 three speed epicyclic automatic gearbox offered as an optional extra from Nov 1967 with overall ratios 3.909:1, 5.668:1, 9.34:1, reverse 8.17:1. Rear Axle: Roadster and GT – Hypoid semi-floating (tube-type Salisbury) rear axle with 3.909:1 ratio from Nov 1967 to Aug 1971.
What’s the diff ratio for a MGB automatic?
MGB automatics used the 3.7:1 ratio as well as some MGCs. The MGC’s ran 3.7, 3.3, and 3.07. They are normally in high demand by not only C owners but also the V8 conversion crowd. I find this UK link for crown wheels etc. If you have a Banjo looks like the ratios are 3.9 (standard) or 3.7. If you go with this let us know how it works out.
Live axle, hypoid bevel gears. Ratio: Manual 3.909:1, Auto 3.7:1 MPH/1000rpm: Manual top: 17.9, o/d: 22.1, Auto: 18.91 Grade of oil: SAE 90EP Capacity: 1.5 pints Cooling System Pressurised, thermostatic control, pump assisted. Capacity: 12 pints. Fuel Tank Capacity Approx. 12 gallons. Tank located at rear of car under boot floor. Body Styles
What’s the final drive ratio on a MGA 1600?
MGA 1600 Mk2, MGB to 1965 (roadster only) 4.3, 4.1, 3.9 or 3.7 If you obtain a diff from an unknown source, the ratio is usually marked on the edge of the crown wheel with the number of teeth on the crown-wheel and pinion (e.g. 43/10). You can also count them. Dividing the larger number by the smaller gives the ratio.
What’s the best way to change gears in a MGB?
Hold 3rd gear with overdrive engaged, wait for the gap, flick out of OD, with a far faster change than any manual operation, accelerate past and your gone! Then when cruising, drop into OD 4th and benefit from the 22% raising of the gearing to reduce noise, wear and fuel consumption.
