Fuel Mileage with Straight Pipe
Captain
Joined: Feb 2007
Posts: 549
Likes: 0
From: OSU-Okmulgee
RE: Fuel Mileage with Straight Pipe
I am running K&N intake with full straight 4x4 and I make around 18 going 65 and I wanna know why I make about 19 going 75-80 down I-40. It might not be that big of climb as mpg but I fueled up going home and back and calculated about 18 and the next week I raced a kid going about 80 the whole way and I needed less gallons to fill myself up. Same miles per tripe just different speeds.
Hall Of Fame
Joined: Jan 2004
Posts: 12,946
Likes: 309
RE: Fuel Mileage with Straight Pipe
ORIGINAL: CutterW
I am running K&N intake with full straight 4x4 and I make around 18 going 65 and I wanna know why I make about 19 going 75-80 down I-40. It might not be that big of climb as mpg but I fueled up going home and back and calculated about 18 and the next week I raced a kid going about 80 the whole way and I needed less gallons to fill myself up. Same miles per tripe just different speeds.
I am running K&N intake with full straight 4x4 and I make around 18 going 65 and I wanna know why I make about 19 going 75-80 down I-40. It might not be that big of climb as mpg but I fueled up going home and back and calculated about 18 and the next week I raced a kid going about 80 the whole way and I needed less gallons to fill myself up. Same miles per tripe just different speeds.
Captain
Joined: Feb 2007
Posts: 549
Likes: 0
From: OSU-Okmulgee
RE: Fuel Mileage with Straight Pipe
I think it is repeatable. at 65 since my speedo is off with tire change I'm around 1900 and at 80 I'm around 2100. I just dont feel right because it seems to whine a little more running those that 200 more rpm. But It runs same temp, seems a little better milage. I ran it once and seen I used less fuel so next time I did same thing and forgot to do my milage because i took a detour and I'm unsure the miles. I'm going home thursday with ALL my stuff from college so see if that little wieght (prob 500-700 pounds) will make crap for difference.
Record Breaker
Joined: Mar 2006
Posts: 1,759
Likes: 0
From: in the woods NY
RE: Fuel Mileage with Straight Pipe
ORIGINAL: steve05ram360
expect another 1~1.5 mpg after the aero install (& it breaks in with heat cycles). that's what I saw after the install. you will get more low end torque without a doubt. put it right after the downpipe where the cat used to be (or should be).
expect another 1~1.5 mpg after the aero install (& it breaks in with heat cycles). that's what I saw after the install. you will get more low end torque without a doubt. put it right after the downpipe where the cat used to be (or should be).
Veteran
Joined: Mar 2008
Posts: 265
Likes: 0
From: New Meadows, Idaho
RE: Fuel Mileage with Straight Pipe
I'm straight piped and BHAF installed...
BOMB's Listing...
http://mopar.mopar1973man.com/2002-dodge/bombs/bomb's.htm
Well my last trip to go shopping was 68.4 Miles includes highway speeds of 65 MPH thenclimbing a grade at 45 MPH and going up to 5,200 Ft from 2,800 ft.Also city driving(stop & go) at 25 MPH (Max speed in town)When I returned home I was looking at...
My Average Speed
And It cost me...
(At $4.299 a gallonf for diesel fuel)
BOMB's Listing...
http://mopar.mopar1973man.com/2002-dodge/bombs/bomb's.htm
Well my last trip to go shopping was 68.4 Miles includes highway speeds of 65 MPH thenclimbing a grade at 45 MPH and going up to 5,200 Ft from 2,800 ft.Also city driving(stop & go) at 25 MPH (Max speed in town)When I returned home I was looking at...
My Average Speed
And It cost me...
(At $4.299 a gallonf for diesel fuel)
Professional
Joined: Aug 2004
Posts: 117
Likes: 1
From: 33.43.342, 84.21.602
RE: Fuel Mileage with Straight Pipe
herb, youve actualy got 3.73's in your axels. if you go to 315's from 265's your looking at about a 6-7% drop in engine RPM's.
my true mileage test will be here at the begining of next month, got a 700 mile round trip comeing up.
my true mileage test will be here at the begining of next month, got a 700 mile round trip comeing up.
