Testing diablo sort tuner for my 2014 denail 6.2 liter 1/4 mile testin

[Boombastic]

All runs it Toronto Motorsports park. All runs in 4wd.petro canada 94 octane fuel

Stock run 1/8 mile 9.85 at 73 mph.1/4 mile15.13 At 94 mph traction control on

Diablo sport big tune 1/8 9.88 at 73 mph 1/4 15.12 at 95 mph

Data logs with diablos big tune tells that there was plié of knock from 58 mph to the end of the run. Truck had to adjust the time 7 degrees to compensate.

Next Run was Same as above but took TC off and shaved off two tenths in the 1/8 and 2.5,tenths I the 1/4. Still lots of knock and hadn't changed( which I knew)Not good at all .

 

Next run was to pull three deg if timing at the 4000 to 5000 rpm range

Final run was 1/8 mile 9.46 at 74 mph and 1/4 at 14.71 at 95 mph. Still a fair bit of knock from85 mph to end of run but not as much as before. Truck had to compensate to about 3.5 degrees. I'm still not happy with the tuner. Not sure what kind of fuel to use . I have data logged many runs with Sunoco 93 ( but not at the track) and have.seen way to much knock. After today I have come to term with the fact that in my case, the tuner is only good for two things, removal of the top speed limiter and Turning off the v4 mode.

[14'SilveradoLT]

That is a ton of knock....

 

Good info, but contact a custom tuner quick...let them dial that thing in. PM me, I know of a tuner that I am sure would like a crack at it. He tunes on several devices and the diablo is one of them.

[Jon A]

That's good info, thanks for sharing. The more I work on my timing map the more I find myself taking more and more timing out running 92 octane. I'm running less advance than stock in many places.

 

While it may be possible for a tune to get a nice bump in power, I believe the biggest ways a tune can improve your times are to:

 

1) Raise shift points. According to my dyno, raising the 1-2 and 2-3 shifts to the 6200-6300 RPM range will increase your total area under the power curve and result in faster times/better trap speeds.

 

2) Take care of the torque managment affecting launch (Stall Torque Managment, etc) which will allow you to launch at 2600+ RPM instead of ~1500 RPM which will improve your 60' greatly if you hook (4WD!).

 

If you gain much actual power from a tune, that's just gravy on the top.

[iCryWheniGoPoop]

Boom, I'm sorry your diablo sport is an overpriced speed limiter remover. I have tuned a handful of 6.2's since I last looked over your issue and one of which had the same tuner as you. I know I have talked good in the past on Diablo sport but after what I have seen on the '14 model canned tunes, I honestly can't see how they spent more than 15 minutes actually tuning on these trucks to create that tune. The 6.2 timing tables are pretty aggressive from factory and just needs trans improvements along with some torque nanny shaving to wake it up.

[Sooperdave]

Boom, I'm sorry your diablo sport is an overpriced speed limiter remover. I have tuned a handful of 6.2's since I last looked over your issue and one of which had the same tuner as you. I know I have talked good in the past on Diablo sport but after what I have seen on the '14 model canned tunes, I honestly can't see how they spent more than 15 minutes actually tuning on these trucks to create that tune. The 6.2 timing tables are pretty aggressive from factory and just needs trans improvements along with some torque nanny shaving to wake it up.

What kind of timing are you seeing with these new engines? Just curious.. Guess I could still try plugging in my dashhawk to see if it will work! lol

[Jon A]

1) Raise shift points. According to my dyno, raising the 1-2 and 2-3 shifts to the 6200-6300 RPM range will increase your total area under the power curve and result in faster times/better trap speeds.

 

I shouldn't have answered that from memory. The optimum 2-3 shift is about 100 RPM lower than the 1-2 shift (so figure 6100-6200 for a stock engine) as the gears are closer together. For those interested in doing the math, the 2-3 gears are quite a bit closer together so you'd think the difference would be greater. The thing is the computer allows more TC slip at the 1-2 shift which makes up some of the difference. A 6300 shift from 1-2 puts it settling around 4050 RPM in second, a 6200 2-3 shift puts it around 4150 after the shift. Like I said, it's not exact as the converter varies its slip throughout the process.