larger tires
#21
03-04-2008 | 04:48 PM
Member
Joined: Dec 2007
Posts: 1,783
From: Torrance, CA
There are a couple companies out with different final drive for the Fit I believe. Try a search on this site for them. But they are for better acceleration not lower RPM...
so wait a minute....why did I even post that then....
nevermind
so wait a minute....why did I even post that then....
nevermind
#22
03-04-2008 | 04:51 PM
Member
Joined: Apr 2007
Posts: 52
From: Canada
I can see the larger size tires helping a little, maybe, in theory. But it can't make *that* big a difference. The possible gain is pretty small to begin with since you're reducing engine speed by just a few percent. It's still got to generate the same amount of power, a bit more actually. Just for a random guess you might get 1% better engine efficiency running at 3500rpm instead of 3600, but then you also do have to accelerate a bit now and then, make turns, the heavier tires absorb more energy from bumps, and there's also going to be more air resistance when the car is raised higher off the road.
Yeah, that's what started me looking at different sizes when I went to buy tires. Still, fuel efficiency readings being off by 2% is less than 1mpg, so it doesn't explain that much.
So the sport tach will be 2.1% less STOCK base model
#23
03-04-2008 | 06:50 PM
Thread Starter
|
Member
Joined: Feb 2008
Posts: 1,049
From: lake worth FL
I have and I believe it has a huge impact on the highway, I averaged 44mpg on one occasion over a very long distance trip.The tires were heavier and I suspect my city miliage was most likely down. I detailed the trip some time ago... (see post #3)
https://www.fitfreak.net/forums/eco-...79-40-mpg.html
Using closer to stock dia tires later on I got lower results.
https://www.fitfreak.net/forums/eco-...79-40-mpg.html
Using closer to stock dia tires later on I got lower results.
On your 17" heavey tires what size did the sidewall have on it?
#24
11-25-2017 | 04:58 PM
New Member
Joined: Sep 2017
Posts: 1
From: New Lenox
205 60 15
I can see the larger size tires helping a little, maybe, in theory. But it can't make *that* big a difference. The possible gain is pretty small to begin with since you're reducing engine speed by just a few percent. It's still got to generate the same amount of power, a bit more actually. Just for a random guess you might get 1% better engine efficiency running at 3500rpm instead of 3600, but then you also do have to accelerate a bit now and then, make turns, the heavier tires absorb more energy from bumps, and there's also going to be more air resistance when the car is raised higher off the road.
Yeah, that's what started me looking at different sizes when I went to buy tires. Still, fuel efficiency readings being off by 2% is less than 1mpg, so it doesn't explain that much.
Yeah, that's what started me looking at different sizes when I went to buy tires. Still, fuel efficiency readings being off by 2% is less than 1mpg, so it doesn't explain that much.
Putting this out there because I came here for the info. Stock everything else.
Thread
Thread Starter
Forum
Replies
Last Post
