Vehicle & Technical > Discovery

MPG with 33's

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ian101:
Have a set of 33's waiting to go on the disco and am wondering what sort of change /drop in MPG I should be expecting to find. I will also be changing the transfer box to help with the gearing.

At present I get about 30mpg with the K&N and full width intercooler .

Ian

Range Rover Blues:
On a steady run you might get about the same, but if you are doing a lot of stop startinh then it will drop, noticeably.  It's not just the gearing but the amountof weight in the tyres that you have to get moving, it takes more than 3 tims the effort to spin that weight as it would if it were in your boot.

mentalmoshio sophs V8i:
sorry 33s need some work on the gearing its just to much to ask for it to run smoothly and normal unloaded driving feels like a great carvan on the back

auf_wiedersehen_pet:
It will appear to drop dramatically because the new tyres through your speedo out.

Good news: you can add 14% to any new mileages recorded to eliminate speedo error. Simply multiply mileage by 1.14 to get an accurate reading.

 :lol: :lol:

Budgie:
Ian's changing the transfer box so the speedo will be within about 5mph of the actual reading with the 33" tyres on there, at least mine is meadured with a GPS.  ;)

With the same setup as you're planning Ian, I'm getting about 26mpg on a normal day but that's with a winch on the front and a large roofrack. So, once the gearing is sorted, it doesn't make that much difference and it also drives much the same as well.

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