Outer Limits 4x4 Board

hey all
l was wondering on a 3.0 guiv tdi with a 3 inch lift and 33x12.5x17 would this cause my speedo to read incorrect? If so which way so if l was doing 100kph what would it be??

And also with the lift would this use up more fuel or would it be marginal?


Thanks you

Very little but yes the speedo will be out maybe 5kmph.........eg you doing 100kmph speedo will say 95kmph

RED-GU wrote:hey all
l was wondering on a 3.0 guiv tdi with a 3 inch lift and 33x12.5x17 would this cause my speedo to read incorrect? If so which way so if l was doing 100kph what would it be??

And also with the lift would this use up more fuel or would it be marginal?


Thanks you

any lift makes a car less aerodynamic.

biggq answered your other. but depends how your speedo was reading to start with.

It will show about 4% slower on your speedo if they measure a true 33".

But your speedo may be out a touch so you need to work it out with a GPS. ie My speedo reads about 3% too fast so for me, I would nearly be spot on running 285/75R16 or 33"x12.5"x17"

with 285 75 16 true 33's my gu is lucky to be 1km out (hard to tell its that close ) used with gps , thats at 100km , on the hwy the tyres bigger radious should improve fuel econemy but the weight of the tyres its rolling and the rolling resistance would probably negate that , our fuel economey hasn't changed that much for me to tell (4.5ltr) but you can feel a slight power decrease pushing the slightly bigger rubber taking off etc with standard diff ratios .

more lift more car hitting the wind = more fuel , but i don't think it would be a factor to put you of, it won't make that much difference on a diesel come bowser time . the tyres would be the biggest draw on fuel more so than the 3" lift .

cheers Jai

we tested my GU with a couple of gps units and they said my speedo is out 10% with 285/33s when the speedo reads 100kph the car is traveling exactly 110kph.

yeah get a gps reading my gq is exact with the 33's on for some reason.

BigMav wrote:yeah get a gps reading my gq is exact with the 33's on for some reason.

mass produced speedos, just punched out painted on #'s. chances are there will be errors.. specially when the manufacturers say that 10% error is ok....

yeh nissan speedos are pretty ordinary mines out 4kms with the 35s on when doing 100 lol