Duramax Daily Driver Dyno results
#1
TECH Regular
Thread Starter
iTrader: (1)
Join Date: Jun 2005
Location: Alvin Tx
Posts: 423
Likes: 0
Received 0 Likes
on
0 Posts
Duramax Daily Driver Dyno results
First my '09 GMC Duramax with lift and 35's
Picked up over 160rwhp and 140rwtq with still safe tune
So far I am averaging about 18mpg, up from about 12mpg
Next is my dad's '09 Dodge Cummins with lift and 35's
It picked up almost 60rwhp and 150rwtq with tuner on stage 1
So far fuel mileage is close to 20mpg, up from about 12mpg
Both were done at Relentless Diesel in Willis and we highly recommend them to anyone looking for more power and better fuel mileage
Picked up over 160rwhp and 140rwtq with still safe tune
So far I am averaging about 18mpg, up from about 12mpg
Next is my dad's '09 Dodge Cummins with lift and 35's
It picked up almost 60rwhp and 150rwtq with tuner on stage 1
So far fuel mileage is close to 20mpg, up from about 12mpg
Both were done at Relentless Diesel in Willis and we highly recommend them to anyone looking for more power and better fuel mileage
Last edited by Randy_S; 12-12-2011 at 08:44 PM.
Trending Topics
#9
12 Second Club
iTrader: (2)
Join Date: Apr 2007
Location: SE Houston
Posts: 391
Likes: 0
Received 0 Likes
on
0 Posts
Gotta love diesels, couldn't afford a good one, but I am averaging around 19 mpg on the 4.8 silverado I picked up recently, it is nice compared to the 16ish I was getting with the camaro, and filling up with 87 vs 93 at that!
Last edited by 78novacaine; 12-13-2011 at 12:22 AM.
#10
Teching In
iTrader: (9)
Join Date: Jan 2009
Location: damon, tx
Posts: 34
Likes: 0
Received 0 Likes
on
0 Posts
Ive been thinking about getting my transmision built by them. Ive heard some good stuff hopefully sometime in the next couple months I will be taking it there, if the trans will last that long lol
#13
I've debated picking up a diesel truck, but I've always wondered if the mpg tuning was true or not....I don't want a 12mpg daily driver, but 20mpg is damn near as good as I am getting with my Infiniti sedan and I'd much rather have a truck than a car.
#14
LS1Tech Co-Founder
iTrader: (38)
I pulled off my tuner on my '06 Ram to get a warranty PCM reflash. Truck went from the normal 20 mpg, down to 17 mpg. I drove it around like that for about a month, then put the tuner back on. 20 mpg again. Diesels definitely can make more power and increase mpg at the same time. Get a pre-07 model, without the DPF crap they have nowadays. It will be cheaper to mod.
#17
10 Second Club
iTrader: (17)
Join Date: Feb 2005
Location: Belton, TX
Posts: 239
Likes: 0
Received 0 Likes
on
0 Posts
Relentless is very very good! Like Randy said, they did all of RC's work back in the day. I dynoed my truck there a couple weeks ago and it did 546/1042. Chris is a great guy and very helpful!
http://m.youtube.com/index?desktop_u...?v=TpSarrnNRWg
http://m.youtube.com/index?desktop_u...?v=TpSarrnNRWg
#18
TECH Junkie
iTrader: (2)
Technically, you are correct. A 6.7 Cummins will cost about $60 more to do the basic mods than a 5.9. A 6.7 will require an EGR blockoff plate ($60). The exhaust, CAIs and tuners are the same price for the 6.7 and 5.9.
If you go in for warranty work, the 6.7 is a little bit more of a pita to put back to stock. That DPF system is heavy! With that said, I did it by myself in my driveway in a couple of hours.
If you go in for warranty work, the 6.7 is a little bit more of a pita to put back to stock. That DPF system is heavy! With that said, I did it by myself in my driveway in a couple of hours.
#19
On The Tree
Join Date: Dec 2003
Location: Friendswood, Tx
Posts: 199
Likes: 0
Received 0 Likes
on
0 Posts
I really want to mess with it but damn I just need to leave something alone. I plan on buying something new in a few years so I am not sure it would be wise on my part. I have had it 1 year and have a whole wooping 4500 miles on it.
#20
TECH Regular
Thread Starter
iTrader: (1)
Join Date: Jun 2005
Location: Alvin Tx
Posts: 423
Likes: 0
Received 0 Likes
on
0 Posts
The only dough I have Randy is the cookie dough my wife bought for all the holiday cookies she makes.
I really want to mess with it but damn I just need to leave something alone. I plan on buying something new in a few years so I am not sure it would be wise on my part. I have had it 1 year and have a whole wooping 4500 miles on it.
I really want to mess with it but damn I just need to leave something alone. I plan on buying something new in a few years so I am not sure it would be wise on my part. I have had it 1 year and have a whole wooping 4500 miles on it.