Mileage and Exhaust
Thread Starter
Joined: Sep 2006
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Mileage and Exhaust
Hello all:
I have a 2001 Ram 1500 4x4 Extended Cab Long Bed with the 5.9. The truck has no mechanical problems. I am running 265/76/16 tires. I just bought and installed a Hypertech program. I looked down the throttle body and do not have any plenum issues. I also did a fresh oil change and air filter when installing the Hypertech 87 Octane program also. I also had to replace the TPS as well.
So...after all this, on a 305 mile trip from Chicago to Southern Indiana and back up to Lafayette Indiana, I averaged 15.7 MPG. This is found by filling up, topping off in the same manner I always do, and computing miles divided by gallon put in the tank. The 15.7 was right on target with what the overhead computer said was my average as well. I had reset that in Chicago. On the 190 mile trip from Lafayette to the Chicago area where I live, my average was 17.5 MPG. All mileages were cruising between 64 and 67 MPG. If you haven't guessed, I am extremely happy with these numbers. As for the 17.5, as best I can tell, I had a small, 5 mph, rear quartering tailwind. So I know that helped.
My question is: Would putting on dual exhaust from the cat back without a muffler hurt my mileage at all? I am now paranoid to make any further changes because I don't want to mess up the mileage. Any thoughts?
Thanks.
Ted
I have a 2001 Ram 1500 4x4 Extended Cab Long Bed with the 5.9. The truck has no mechanical problems. I am running 265/76/16 tires. I just bought and installed a Hypertech program. I looked down the throttle body and do not have any plenum issues. I also did a fresh oil change and air filter when installing the Hypertech 87 Octane program also. I also had to replace the TPS as well.
So...after all this, on a 305 mile trip from Chicago to Southern Indiana and back up to Lafayette Indiana, I averaged 15.7 MPG. This is found by filling up, topping off in the same manner I always do, and computing miles divided by gallon put in the tank. The 15.7 was right on target with what the overhead computer said was my average as well. I had reset that in Chicago. On the 190 mile trip from Lafayette to the Chicago area where I live, my average was 17.5 MPG. All mileages were cruising between 64 and 67 MPG. If you haven't guessed, I am extremely happy with these numbers. As for the 17.5, as best I can tell, I had a small, 5 mph, rear quartering tailwind. So I know that helped.
My question is: Would putting on dual exhaust from the cat back without a muffler hurt my mileage at all? I am now paranoid to make any further changes because I don't want to mess up the mileage. Any thoughts?
Thanks.
Ted
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Joined: Oct 2006
Posts: 55
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RE: Mileage and Exhaust
ORIGINAL: tp7800
Hello all:
I have a 2001 Ram 1500 4x4 Extended Cab Long Bed with the 5.9. The truck has no mechanical problems. I am running 265/76/16 tires. I just bought and installed a Hypertech program. I looked down the throttle body and do not have any plenum issues. I also did a fresh oil change and air filter when installing the Hypertech 87 Octane program also. I also had to replace the TPS as well.
So...after all this, on a 305 mile trip from Chicago to Southern Indiana and back up to Lafayette Indiana, I averaged 15.7 MPG. This is found by filling up, topping off in the same manner I always do, and computing miles divided by gallon put in the tank. The 15.7 was right on target with what the overhead computer said was my average as well. I had reset that in Chicago. On the 190 mile trip from Lafayette to the Chicago area where I live, my average was 17.5 MPG. All mileages were cruising between 64 and 67 MPG. If you haven't guessed, I am extremely happy with these numbers. As for the 17.5, as best I can tell, I had a small, 5 mph, rear quartering tailwind. So I know that helped.
My question is: Would putting on dual exhaust from the cat back without a muffler hurt my mileage at all? I am now paranoid to make any further changes because I don't want to mess up the mileage. Any thoughts?
Thanks.
Ted
Hello all:
I have a 2001 Ram 1500 4x4 Extended Cab Long Bed with the 5.9. The truck has no mechanical problems. I am running 265/76/16 tires. I just bought and installed a Hypertech program. I looked down the throttle body and do not have any plenum issues. I also did a fresh oil change and air filter when installing the Hypertech 87 Octane program also. I also had to replace the TPS as well.
So...after all this, on a 305 mile trip from Chicago to Southern Indiana and back up to Lafayette Indiana, I averaged 15.7 MPG. This is found by filling up, topping off in the same manner I always do, and computing miles divided by gallon put in the tank. The 15.7 was right on target with what the overhead computer said was my average as well. I had reset that in Chicago. On the 190 mile trip from Lafayette to the Chicago area where I live, my average was 17.5 MPG. All mileages were cruising between 64 and 67 MPG. If you haven't guessed, I am extremely happy with these numbers. As for the 17.5, as best I can tell, I had a small, 5 mph, rear quartering tailwind. So I know that helped.
My question is: Would putting on dual exhaust from the cat back without a muffler hurt my mileage at all? I am now paranoid to make any further changes because I don't want to mess up the mileage. Any thoughts?
Thanks.
Ted