got my tuner in a couple days ago! i absolutly love it! changed my shift points, rev limiter, speed limiter, idle and a few other things! the truck is a monster now!! love the power improvement an shifting!... i didnt touch the fuel or spark, but can those be adjusted to make more power or anything?

 

It is best not to touch those unless you have access to a wideband. Adding to much/little fuel can hurt the engine, and adjusting the spark is adjusting the timing. Just leave them alone or take it down and let someone who knows what they are doing mess with it.

 

ok yea i figured that so i left it alone!.. but i was reading about the different tunes and you were saying the different tunes have different power bands i have only tried the 93 so far and like it but i like bottom end.. like i like the put you in the seat feeling and most of my races are like 0-70.. so which setup would be the best?

 

Well, best thing I can tell you is to try them one by one... BUT run each tune for a while, maybe do a month on the 93, RESET EVERYTHING (PCM/Tune), switch to the 91, run it for a month, do a reset and run the 87.

Personally I like the 91, but I have not tried the 93 because I do not have 93 available to me.

 

Yeah takes the ecu a while to completely re-learn all the programming. When I first loaded my DSP at 91 tune I thought, Nice little more power, better shifting this is ok. After about a week I noticed I was able to chirp the tires (35's) in second under full throttle and seemed there was alot more power. I also found when I laid off the throttle a little, The new tune bought me almost 2mpg more over the stock.
All this was confirmed a couple of day ago when I had to load the stock tune to have some changes done to the ECU by the dealership. The power just dropped as did my mpg.

I also use 91 since I can't easily find 93 around here anymore, As I understand it there is not much of a difference between the 91 and 93 tune so I am not to jealous.

 

yea 93 is everywhere around me 91 is actually hard for me to find.. but i have ran about 2 tanks through the truck with 93 tune and with every tank i notice more power and more getup so we will see.. ill just try 87 instead of 91 cause the very little difference between the 2.. thanks guys now hopefuly i can get them headers and really wake this beast!

 

let me know how the 87 tune works out im really interested in buying a diablo, but im still on the fence about it. I would only do the 87 tune because i do a lot of driving and the gas bill would be too crazy with the higher octane stuff. Also is it recommended to switch back to the stock tune every time you bring it in to the dealership? (like for oil changes and regular maintenance? I just bought 35's and am in the process of getting the truck lifted 6 inches and think im going to need the extra power.

 

DO NOT RUN 91 or 93 OCTANE TUNE WITH 87 OCTANCE GAS, UNLESS YOU DON'T LIKE YOUR ENGINE!!!! In this case close is absolutely not good enough, Detonation will destroy your engine and absolutely void any warranty you might have.

 

Also i always got better mpg on the 91 tune. As for running a higher octane with the tune if you are running the 87 tune i always ran 89 with the 87 tune loaded. Did that with my flashpaq and the dsp for a while but i do not like that tune very much to begin with.

 

^+1 better MPG on 91 tune.

Running higher octane gas than the tune you have is fine.
I thought they were talking about running the 91 tune on 87 octane gas. Although be nice to see a few pics of whats left of there pistons afterwords.