Hey guys!
Put a new set of tires on my 80 last week. Went with 285/75R16 BFG AT KO2's. I love them so far. I like the look a lot and they don't seem overly loud compared to the dry rotted stock size Michelin LTX's that were on there.
I took my first long trip this weekend from Nashville to Knoxville for a wedding. About 180 miles each way.
Before we left, I popped my scangauge II in and set up RPM, MPH, Coolant and AVG MPG. Hopped on http://tire-size-conversion.com/speedometer-calibration/ to see what my new MPH would be with the bigger tires. It ends up being about 5% faster than what the speedometer states.
The scangauge has a section for adjusting the speed. I punched in 5%. Matched that up with GPS and it was spot on.
Here's my question. The scangauge showed 15.2 MPG coming back from Knoxville --> Nashville. Do I need to multiply that by 1.05 (the 5% speed difference) or has the scangauge already done that math for me?
When I go to calculate MPG by hand at the pump, I will need to multiply the initial MPG by 1.05 to get the true number, correct? This is because the car is actually moving 5% farther than the odometer actually states.
Anyways, if the scangauge does in fact do the math, 15.2 MPG seems pretty good to me with 285's on there. I never calculated nor took a trip with the stock 275's. Ballpark wise, how many MPG's have yall lost w/ bump up to 285's? I traveled 70 MPH (corrected) at about 2280-2310 RPM's. Knoxville to Nashville has you scale up onto a plateau en route to Nashville.
Final thoughts : I thought the 80 was great on the trip. It's a little loud but it's a 18 year old "true LC." I didn't find it dropping out of OD too much to keep up speed.
Thanks!
Put a new set of tires on my 80 last week. Went with 285/75R16 BFG AT KO2's. I love them so far. I like the look a lot and they don't seem overly loud compared to the dry rotted stock size Michelin LTX's that were on there.
I took my first long trip this weekend from Nashville to Knoxville for a wedding. About 180 miles each way.
Before we left, I popped my scangauge II in and set up RPM, MPH, Coolant and AVG MPG. Hopped on http://tire-size-conversion.com/speedometer-calibration/ to see what my new MPH would be with the bigger tires. It ends up being about 5% faster than what the speedometer states.
The scangauge has a section for adjusting the speed. I punched in 5%. Matched that up with GPS and it was spot on.
Here's my question. The scangauge showed 15.2 MPG coming back from Knoxville --> Nashville. Do I need to multiply that by 1.05 (the 5% speed difference) or has the scangauge already done that math for me?
When I go to calculate MPG by hand at the pump, I will need to multiply the initial MPG by 1.05 to get the true number, correct? This is because the car is actually moving 5% farther than the odometer actually states.
Anyways, if the scangauge does in fact do the math, 15.2 MPG seems pretty good to me with 285's on there. I never calculated nor took a trip with the stock 275's. Ballpark wise, how many MPG's have yall lost w/ bump up to 285's? I traveled 70 MPH (corrected) at about 2280-2310 RPM's. Knoxville to Nashville has you scale up onto a plateau en route to Nashville.
Final thoughts : I thought the 80 was great on the trip. It's a little loud but it's a 18 year old "true LC." I didn't find it dropping out of OD too much to keep up speed.
Thanks!
