2015 duramax mods [Archive] - Duramax Diesels Forum

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b.d.keathley
03-08-2016, 08:46 PM
Wth!! I bought a 2015 new body style duramax and this thing is way slower than my 05 lly. Are there any mods for these trucks?

aklbz
03-08-2016, 08:49 PM
Was your LLY stock?


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quadracer37
03-08-2016, 10:56 PM
If your comparing a stock lily to your lml id say that is hard to believe. The lml rolls out of the factory with ~80 more hp than an lly...

jrkrace
03-09-2016, 08:31 AM
I noticed a big difference from my 2015 and my tuned LBZ. The sluggishness was beginning to get irritating. My biggest problem was the amount of pedal needed to get the truck moving. I tried a throttle booster and I'm pretty happy with it.

quadracer37
03-09-2016, 08:42 AM
any EFI tuning, whether is emissions compliant or delete will get rid of the dead pedal feel. that is about the worst part of the new trucks is the lazy throttle pedal.

msaenz18
03-09-2016, 08:48 AM
Get a car if u want to go fast lol


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SteveLBZ06
03-09-2016, 04:13 PM
Yea takes lots of throttle to get the new trucks moving. I've noticed that as well. They go, just have to really let em have it.

S Phinney
03-09-2016, 08:14 PM
They intentionally setup the throttle for emissions purposes. It's easy to make it responsive.

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NC-smokinlmm
03-09-2016, 08:27 PM
My 15 turns on like a switch, tune that sucker...:D

b.d.keathley
03-10-2016, 10:44 AM
I noticed a big difference from my 2015 and my tuned LBZ. The sluggishness was beginning to get irritating. My biggest problem was the amount of pedal needed to get the truck moving. I tried a throttle booster and I'm pretty happy with it.

What is a throttle booster?

b.d.keathley
03-10-2016, 10:49 AM
Was your LLY stock?


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The lly had gutted cat no muffler, ppe pulled the motor to do heads with arps ported fuel rail lbz mp pcv re route turbo dp efi live mileage tune. But night and day difference. Seems like the new truck only moves if I put the pedal to the meda. Otherwise its real smooth and gay.

b.d.keathley
03-10-2016, 10:51 AM
They intentionally setup the throttle for emissions purposes. It's easy to make it responsive.

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What do I gotta do? Im moving to Arkansas next year and dont need smogs out there. Didnt know if the dpf and def and cat are just for California or if that was a federal thing. Truck is from Utah.

S Phinney
03-10-2016, 10:56 AM
It is a federal regulation. There are ways to tune the truck and eliminate those items or you can have some nice emissions tuning as well that will have plenty of throttle response. Most any if the tuners can fix it for you. A lot if the guys will not touch non emission tuning officially.

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jrkrace
03-10-2016, 11:47 AM
What is a throttle booster?

It's a box that plugs into the throttle pedal and alters the signal. 5% throttle from your foot is amplified to the computer. Really wakes the truck up and I don't have to deal with warranty issues because the computer never gets touched....There are a few companies out there that makes them....

Kind of the way the first gen Duramaxes were tuned except you plug in at the pedal instead of under the hood.....

b.d.keathley
03-10-2016, 08:23 PM
It's a box that plugs into the throttle pedal and alters the signal. 5% throttle from your foot is amplified to the computer. Really wakes the truck up and I don't have to deal with warranty issues because the computer never gets touched....There are a few companies out there that makes them....

Kind of the way the first gen Duramaxes were tuned except you plug in at the pedal instead of under the hood.....

Im listening. ... how do I get one and how much?

jrkrace
03-11-2016, 12:55 PM
JMS electronics and BD Diesel sell them for around 300.00. I went with the JMS because you can adjust it and it seems better built. PN is 1015GMT...

b.d.keathley
03-11-2016, 08:03 PM
Appreciate it thanks for the info!