i got a gq lwb with a 5l v8 in it currently running 33'' an 4.11 diff gears. im soon going to 35'' and want to no if the highway fuel useages would change much.
it does a 100k at 2450 rpm with 33''. the 35's would drop it down to about 2050 so its less rpm but more load on the motor. i no around town it would use more. what rpm would it do in 4th gear at a 100k with the 35's for when im towing heavy loads
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diff gears tire size to fuel useage
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Re: diff gears tire size to fuel useage
Towing heavy loads should not change the overall gearing (ps your revs will be 33/35 x 2450 = 2300 rpm, not 2050)
My guess is it would be barely noticable, however if you have an automatic it may kick down more or lose the TC lock-up more often.
After correcting for speedo differences probably add anothe couple of percent to your fuel consumption.
My guess is it would be barely noticable, however if you have an automatic it may kick down more or lose the TC lock-up more often.
After correcting for speedo differences probably add anothe couple of percent to your fuel consumption.
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Re: diff gears tire size to fuel useage
i no towing wont change the gearing but when i tow big loads i use 4th gear not 5th (manual) 2350 would have to b 4th. a tire 2 inchs bigger would drop the rpm a lot more (in 5th) on the highway 100k
Re: diff gears tire size to fuel useage
I dont think 35"s will drop RPM as much as you think.
the change in gearing will only be around 5% from 33" to 35" tyres
if it is doing 2400rpm at 100km/hr now, it will only drop to around 2250-2300rpm
the change in gearing will only be around 5% from 33" to 35" tyres
if it is doing 2400rpm at 100km/hr now, it will only drop to around 2250-2300rpm
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