has your m.p.g. gone UP or DOWN since 17" rims?
#7
nothing noticeable. i got about 350 per tank on stock 15's.. i get the same now with 17's.. but i think the offset is off by about 2 percent according some some tire rotation calcuator. so if my speedo says 100. im readyy doing 98. its marginal but makes a difference if your a tree hugger.
#8
My stock 15's(honeycomb) weigh 39.5 lbs/corner, and my lightweight 17" weigh 37.5/corner.
I went from stock 17" wheels (2003) and went to lightweight 17" wheels, and saw an increase of ~ 8-10% w/ the LW wheels.
Then there's the rotating mas deal, so try some LW wheels if you can.
I went from stock 17" wheels (2003) and went to lightweight 17" wheels, and saw an increase of ~ 8-10% w/ the LW wheels.
Then there's the rotating mas deal, so try some LW wheels if you can.
#10
while there is a direct affect on MPG involved when installing larger rims, there is also an indirect one as well....if you have been driving on 15s or 16s for a while, you will be used to a certain level of acceleration, as measured by the Gs you're used to experiencing when accelerating. Now, slap on larger rims (I'm assuming you're not putting on larger, super-duper, light-as-styrofoam racing wheels but rather ones that weigh more than those you are replacing) and you're going to experience a decrease in acceleration. SO what do we do in such a case? We tend to mash down on the gas pedal that much harder in order to compensate, to get that acceleration back. I know not everyone does that, but the psyche is relevant and undoubtedly present. I bring this up because this affects MPG and thus, will make the responses in this thread highly variable.
#11
Originally Posted by semaj3708
I went down, but reading some of your posts I guess I'm in good shape with 350. But before I was getting 400+.
#13
when you put bigger diameter wheels on your car it increases the rotational diameter which, if you dont recalibrate your ecu (if its possible) to the new wheel size it will effect your speedometer making it say you're going slower and it will effect your gas milage making it say you're getting worse gas milage because the computer cant compensate for the change in wheel size.
#16
Originally Posted by shiftnatredline
when you put bigger diameter wheels on your car it increases the rotational diameter which, if you dont recalibrate your ecu (if its possible) to the new wheel size it will effect your speedometer making it say you're going slower and it will effect your gas milage making it say you're getting worse gas milage because the computer cant compensate for the change in wheel size.
Anyways, stock saw blades are w/e they weigh, I then moved to Z32 wheels (16x7.5) that weigh 16.0 lb, and now Im on Borbet type E (17x8) that weigh 23lbs.... my milage has not changed. Its my driving habbits that are eating up my gas
#19
Originally Posted by 96nismomaxi
all wrong think about it guys ur speedo is off so u cannot get true MPG
.....just thought i would throw that in there
.....just thought i would throw that in there
#20
Originally Posted by 96nismomaxi
all wrong think about it guys ur speedo is off so u cannot get true MPG
.....just thought i would throw that in there
.....just thought i would throw that in there
Read this 3-5 times, and then you'll know what we're talking about.
Originally Posted by 95BLKMAX
As long as the OVERALL DIAMETER of the wheel/ tire combo is the same, it doesnt matter at all if you go from 15" rims to 18", given that you have the properly sized tire sidewall for it. If the tire covers the same distance in one rotation, with 15s or 18s, the speedo will not be off. Thats where the whole +1/+2/+3 rim and tire proer sizing come into play. I have 17" wrapped with 235/45-17s and my speedo is right on mark.
Originally Posted by 95BLKMAX
and now Im on Borbet type E (17x8) that weigh 23lbs.... my milage has not changed. Its my driving habbits that are eating up my gas
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09-11-2015 05:21 PM