How much horsepower does a diablo tuner add to a 6.4 hemi
James Sullivan
Published Mar 27, 2026
Diablo 93 octane tune vs Stock Tune vs Dyno Tune on the Dyno added how much HP Horsepower! In this video we look at a 5.7L Hemi jump on the dyno with stock t…
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Either route will be extremely simple as DiabloSport will handle all the programming and unlocking of the PCM. Act now to get your truck running Diablo Tuned! Performance Tunes. Diablo Tune 93+ Octane – 15 HP & 20 LB-FT of TQ; 91+ Performance – 13 HP & 15 LB-FT of TQ; 87+ Performance – 8 HP & 10 LB-FT of TQ
Looks like some decent gains; 15-20rwhp. In all, for daily driving, that won’t impact too much. Where I feel the 6.4 needs more oomph is in the upper RPM band and to make a significant difference, I think supercharging and a tuner will fix that. The only time where I get that feeling for more oomph is at WOT on the highway.
I got the i3 tuner and the custom tune together good price. Well lets just say its night and day don’t know how accurate the SRT pages are but the hp has read up to 428 hp. I’m going to see if I can get a re tune to be more jumping of the line.
Superchips has a variety of programmers for you to choose from, including Superchips for cars and trucks. Each programmer and tuner is designed to deliver massive boosts in power, torque and MPGs. Discover your ride’s maximum horsepower, torque and fuel economy when you install the Superchips FlashPaq F5 Tuner. Depending on your specific …
Custom Hydro dipping under the hood, SpeedLogix rear strut tower brace, custom Hellcat graphics, Barton Shifter, SRT Performance spoiler, mid-mufflers removed, Hellcat Widebody 2 Replica Wheels, Dusterhoff Stage II package… 180 T-Stat, 775cc injectors, 2.85 pulley, crank pin kit, custom tune = 750+ horsepower to the wheels…
The 6.1L has much greater potential for build-up with just forged internals and you can bolt on a few hundred hp. Hell, you can get 550 hp out of the stock 6.1L with a Votec supercharger running 5.5 lbs of boost and drive it for 100k without risking the motor.
The tuner does so much more than add HP. Hard to explain, better to experience. It won’t turn it into an absolute beast, but it is the best bang for your buck mod out there for less than $500. FWIW, the average seat of the pants dyno requires more than 10HP to register a difference in power.
The dyno itself does not add HP. The dyno only tell you how much HP you have. So, you make a dyno run to get a baseline then you make a change or adjustment and do another dyno run to see if it was better. Then you keep making changes and runs until you are happy or …
I forgot to add this part! Customer’s have reportedly gotten fuel gain from. City driving 2-3 mpg, over the road.1-3@75 miles an hour, and the big one. Pulling little over 10,000lb with 3:73 gears 2-6 miles per gallon!! At all elavations! Most all off these trucks have full exhaust to just muffler delete on them.
Related Questions
Can I tune my Ram 2500/3500 with Diablosport?
The time to equip your Ram 2500/3500 with DiabloSport tuning is now! Save up to 20% off SRP and put horsepower under your tree and under your hood this holiday season! 2017-2018 Ram 2500/3500 trucks do require an unlocked PCM in order to tune. DiabloSport has perfected that process!
What if I already have a Diablosport tuner?
If you already have a DiabloSport tuner and want to get your tune a little more tailored to your Dodge, Chrysler, or Jeep vehicle, this is the option for you. This is for stock to bolt-on modifications. We will make provisions for throttle body’s, CAI, and exhaust/headers.
What Octane tune did Sean build for my Hemi?
Sean knows what he is doing, he built an 89 octane tune that woke up my Hemi! Was this review helpful to you? Yes No I was running a canned 87 tune (on 89 fuel) and Sean hooked me up with a proper 89 octane tune.
How much HP can you add to a stock engine?
The 6.1L has much greater potential for build-up with just forged internals and you can bolt on a few hundred hp. Hell, you can get 550 hp out of the stock 6.1L with a Votec supercharger running 5.5 lbs of boost and drive it for 100k without risking the motor. That’s a 125 hp gain.