srmitchell
NAXJA Forum User
- Location
- Mckinleyville (Humboldt) CA
Hey. I've got an 01 xj. 4.0, aw4.
Stock motor besides a snorkel, IRO cat back exhaust.
4.56 gears, turning 265/75/r16 Treadwright tires. All terrains, at 32 psi. Only 4 inches of lift, no roof rack.
The tires are freaking heavy for being 32x10.50.
60lbs each. With Moab rims, each wheel is about 80 pounds. (Even the maxxis bighorn in that size is between 49-53 pounds)
I tach at 2500rpm at 65 mph (speedo corrected).
However, its so HARD to get it up to 65. It's really fast around town, but I feel like I have to floor it to go past 55 mph on the freeway. And the tranny downshifts no problem, but it feels like it's running out of steam, even in 3rd gear. Overdrive kicks in at 40 mph.
Once it's up to 65, It seems that you have to use a lot of throttle to keep it there. The overhead console says I get 18 mpg at 55mph, 12-14mpg at 65. Horrible. I actually think it's over geared. I know aerodynamics are bad, but I could get 19 mpg all day long on 3.55 gears, at 65 mpg. (Although it sucked everywhere but the freeway.)
I'm think going to 255/85/16 Maxxis Bighorn might help, its a 33.3x10.40r16 tire, and its only 53 pounds. Lighter, and less rpms. (And less rolling resistance.)
Any advice? Kinda sick of taching so high, yet it feels so weak.
Sick of the poor performance, and the bad mpg isn't good either, gas is $4.19/gallon here. (Highest average in the US.)
Thanks.
Stock motor besides a snorkel, IRO cat back exhaust.
4.56 gears, turning 265/75/r16 Treadwright tires. All terrains, at 32 psi. Only 4 inches of lift, no roof rack.
The tires are freaking heavy for being 32x10.50.
60lbs each. With Moab rims, each wheel is about 80 pounds. (Even the maxxis bighorn in that size is between 49-53 pounds)
I tach at 2500rpm at 65 mph (speedo corrected).
However, its so HARD to get it up to 65. It's really fast around town, but I feel like I have to floor it to go past 55 mph on the freeway. And the tranny downshifts no problem, but it feels like it's running out of steam, even in 3rd gear. Overdrive kicks in at 40 mph.
Once it's up to 65, It seems that you have to use a lot of throttle to keep it there. The overhead console says I get 18 mpg at 55mph, 12-14mpg at 65. Horrible. I actually think it's over geared. I know aerodynamics are bad, but I could get 19 mpg all day long on 3.55 gears, at 65 mpg. (Although it sucked everywhere but the freeway.)
I'm think going to 255/85/16 Maxxis Bighorn might help, its a 33.3x10.40r16 tire, and its only 53 pounds. Lighter, and less rpms. (And less rolling resistance.)
Any advice? Kinda sick of taching so high, yet it feels so weak.
Sick of the poor performance, and the bad mpg isn't good either, gas is $4.19/gallon here. (Highest average in the US.)
Thanks.