Andys06GT

the point of the "tune" is to change certain parameters inside the engines computer. i.e. air/fuel ratio, gear ratio, shift point, rev limiters, etc etc... theres TONS of stuff you can do inside that computer, but you have to know what you're doing. the new processor is called a Spanish Oaks, and its fast. and accurate. but by throwing on a CAI, you're changing the air, and it tends to lean out the a/f ratio. a tune simply sets the optimum mixture to actually get a power advantage from the cold air intake without hurting the engine. when you tune, it downloads the stock computer setting to the SCT/diablo tuner, then uploads the tune that you've purchased. you can switch back to stock by loading it, and it downloads the custom tune you had back to the SCT/diablo tuner. it may sound slightly complicated, but its a matter of pressing a button three or four times. a tuner will REALLY help you out if you throw things like exhaust, under drive pulleys, different octane gas, whatever has potential to create more power. you can put it on the dyno, and see what those other adjustments are doing to the air/fuel ratio, or whatever, and tune it from there. a custom or "canned" tune is set up on one car, for a specific part, like a C&l Intake. its optimum on that car, and sold to thousands of others. sure, it'll work and work really well, but in order to get the most performance from YOUR car, you need it tuned on the dyno where you can see whats happening. changing from tuner to tuner doest matter, as long as you load the stock setting back into the car before changing what tuner you're using. you can also tune a procharger with an SCT, just need someone who knows what their doing and some time to get her hooked up and start recording some numbers. its really a matter of preference. lots of people use lots of different things with similiar results. look at who around you gives support for what. if everyone in the state tunes predators, hey, probably not a bad way to go. 6-1, half dozen to another. help at all?

aTm

Not to bash or give you more of a headache deciding -- it's sad but the decision has been gnawing at my mind for weeks now -- but each forum seems to have a "favorite" tuner. You hear a lot about Evo and Brenspeed here, and on another forum it's all Bamachips.

All three I'm sure are great -- I decided on Evo because of beginning of that 9-page long Evo vs Bren thread. Then I jumped to Bren when I read from Dkano that Bren gave a better (very marginally, probably all due to the difference in temps/passes/driver behavior) 1/4 mile time by .1 s.

Huge I know.

Then I jumped to Bamachips after people (on another forums)were comparing Bren's 93 to Bama's 93 race tune and a poster I respect said that Bama gave slightly better performance with better idle and throttle response.

So I should have Bamachip's JLTII+SCT combo with 93 race tune today/tomorrow. I bet the differences are mostly in people's heads, just throwing in what's in my head from scouring the forums and thinking about which tuner to use for approximately 50 hours longer than I should have.

Andys06GT

hhahah you've switched that many time? did u PERSONALLY experience a difference in the evo to bren tune? i mean a REAL difference? i can see .1 seconds as earth shattering, and id figure it to be vehicle specific, but eh, whatever. seems like a lot of money spent because of what people say.

lmmmmm

some difference between the tuners is some will send new tunes via email and others require the hardware sent back to be reloaded.

SweetGT

Well im having mine dyno tuned for a JLT 2 CAI with and X-cal2 this weekend by a local SCT tuner. So hopefully that will provide the best results. Just not to sure about those mail order tunes thats all and I stumbled on this SCT tuner by accident really. I was looking for a place to have gears installed and he told me about the deal he had with SCT and the X-cal2. So i jumped on it.....Thats what im doin.

dkano

What the hell!?!?!?!
Did I say I asked him to put the 93 tune on my car when I had 91 octane in the tank?? NO!!! I went there to get the tunes, not just the 93 one, I asked him if he wasn't even going to give me the 91 tune and he refused, said that the 93 tune was "the killer".!!!

Daniel60

Dude I'm waiting for your answer too. Hang in there it's coming.