How many miles do you have on your truck!
Record Breaker
Joined: Mar 2013
Posts: 1,130
Likes: 15
From: Somewhere in Kentucky
Mason,
That's great to hear! I'd be interested in hearing how the dyno run goes. I hope it's the M1 (I have a new M1 sitting in a box that I plan on using some day). Awesome mileage, much better than the 11-12 I get with my old 5.9. What exhaust you going with? I've got mandrel bent 3" Magnaflow single exit exhaust on mine and I'm happy with it.
That's great to hear! I'd be interested in hearing how the dyno run goes. I hope it's the M1 (I have a new M1 sitting in a box that I plan on using some day). Awesome mileage, much better than the 11-12 I get with my old 5.9. What exhaust you going with? I've got mandrel bent 3" Magnaflow single exit exhaust on mine and I'm happy with it.
Professional
Joined: Dec 2014
Posts: 201
Likes: 0
From: Texas
It's awesome . I believe it was you who said it was either 300 or 375 hp as only two options were there . Well , I think I should go for a dyno run soon . I don't know if it's the M1 or the tune , but , this old girl can certainly do battle with a new hemi . Flyinryan's tune is perfect . I'm doing 15-16 mpg instead of 12-13 with the 5.2 and having way more fun 
I'm still under the factory exhaust so when I get that modded , I'll hit the dyno and see whats there . IMO right now , I got the 375 engine . I have 2 100lb sand bags in the rear to keep the wheels from spinning so much , lol . Winter will be a hoot an a half , 
I'm still under the factory exhaust so when I get that modded , I'll hit the dyno and see whats there . IMO right now , I got the 375 engine . I have 2 100lb sand bags in the rear to keep the wheels from spinning so much , lol . Winter will be a hoot an a half , 
Captain
Joined: Nov 2013
Posts: 594
Likes: 0
From: Bluegrass State
98 & 99
I've had an improvement since the 98 tune up about 5 months
ago, 13.6 mpg no load. The 99 diesel, no load right at 17mpg's.
The 98 now has about 152k on the engine and the 99 about 261k.
Keith
ago, 13.6 mpg no load. The 99 diesel, no load right at 17mpg's.
The 98 now has about 152k on the engine and the 99 about 261k.
Keith
