changing the axle diff ratios
now has anyone done this?
"your car should have an 4,9 ration in front and rear axle. It´s possible
to change into 5,3, than you have a lot of torque more in every gear"
to those g wagen geniuses out there, is this a good idea. to get more torque out of a manual 280 gel. specially when towing uphills.
what will be the consequences?
top speed/cruising?
fuel consumption?
heat produced by the engine?
also if you have other issues in mind please post
i need feed back as much as poss.
thanks.
changing from 4.9 to 5.3 will effectively lower your gearing so yes it will pull under load better but for the same speed on the road the engine will run at slightly higher revs.your top speed will ultimately be lower.
regards mark
And your fuel consumption will RISE!
Common law of physics that a certain amount of energy, ie fuel is required to get a certain amount of work done, in this case moving a vehicle forward against rolling- and wind resistance. Engine efficiency deteriorates rapidly with a rise in rpm above peak torque due to mechanical, friction and pumping losses. That is why the V8's use no more fuel than the 2.8's at the same rate of accelleration and speed. Their torque is much more at much lower rpm hence less wastage. That is also why turbodiesels are so fuel efficient - lots of torque at relatively low rpm.
So, in your case, unless with the standard set-up you are going uphill(on open road) in 3rd, keep it as it is.
You can acheive or cancel out the effects of ratio change by changing wheel/tyre size.
at the moment i am using 15 inch wheels. so is it possible to get better pulling power by changing the wheels size? how?
15" is the diameter of the rim but, ¿what tyre size are you using?
th bigger the overall diameter of the tyre the higher the effective gearing of the car.205 r 16 to 31 10.5 15 gives 8% increase depending on tyre brands.the rim size is irrelevant, its the tyre that makes the difference.
the off road boys ie peter perfect use 35 10.5 15 tyres which raises gearing by closer to 20%.
at the moment i am using 31x10.50r15 AT tyres. and dont forget main aim is to get more torque.
at the moment i am using 31x10.50r15 AT tyres. and dont forget main aim is to get more torque.
If you fit 235/75R15 you will achieve a 7% reduction in rolling diameter (0.733 versus 0.7874 metres diameter), with the corresponding increase in torque, braking power, noise and fuel consumption and reduction in ground clearance (better for city driving and worse for the motorway and offroad)
Cheers
thanks to all
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at the moment i am using 15 inch wheels. so is it possible to get better pulling power by changing the wheels size? how?