Not sure if this question has been answered before, but cant find a good answer by searching, so i thought i would make a thread. I Always hear the phrase(s) "you can do this with a good tune" or "yes it can be done with a good tune". My question is, what makes a so called "good tune", sorry if this seems like a noob question, i'm new to tuning. Just trying to get a feel for what is done.
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What Makes a "Good Tune"?
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There's more to a good tune than chucking it on a dyno and doing WOT pulls, tuning for power. Sure, getting the the timing right for best power without blowing it up is important, but what makes a tune truly good is making it feel like it was done by the manufacturer, the driveability stuff. This also is the stuff a lot of people have trouble with or neglect.
-Getting low/off load and transitional areas right to prevent bucking and hesitation.
-Setting up accel enrichment for best throttle response.
-Leaning out the cruise areas of the map(s) to reduce fuel consumption.
-Getting cold start and warmup enrichment squared away.
-Getting a good idle in varying situations.
-Getting MAT correction and MAT based timing retard right.
-Getting voltage compensation for dwell and injector performance right.
-Setting up closed loop AFR correction correctly.
-Setting up other systems such as boost and nitrous control, flex fuel.
It takes a lot of work to do those things, a lot more than it does to get the timing and fueling set to make as much power as possible.
IG @turbovarg
'91 318is, M20 turbo
[CoTM: 4-18]
'94 525iT slicktop, M50B30 + S362SX-E, 600WHP DD or bust - updated 3-17
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Originally posted by varg View PostThere's more to a good tune than chucking it on a dyno and doing WOT pulls, tuning for power. Sure, getting the the timing right for best power without blowing it up is important, but what makes a tune truly good is making it feel like it was done by the manufacturer, the driveability stuff. This also is the stuff a lot of people have trouble with or neglect.
-Getting low/off load and transitional areas right to prevent bucking and hesitation.
-Setting up accel enrichment for best throttle response.
-Leaning out the cruise areas of the map(s) to reduce fuel consumption.
-Getting cold start and warmup enrichment squared away.
-Getting a good idle in varying situations.
-Getting MAT correction and MAT based timing retard right.
-Getting voltage compensation for dwell and injector performance right.
-Setting up closed loop AFR correction correctly.
-Setting up other systems such as boost and nitrous control, flex fuel.
It takes a lot of work to do those things, a lot more than it does to get the timing and fueling set to make as much power as possible.
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Can I make 400hp?
IDK man, maybe with a good tune?
NO SHIT. hey, with a bad tune bro, no problem.
Originally posted by e30Nick View PostNot sure if this question has been answered before, but cant find a good answer by searching, so i thought i would make a thread. I Always hear the phrase(s) "you can do this with a good tune" or "yes it can be done with a good tune". My question is, what makes a so called "good tune", sorry if this seems like a noob question, i'm new to tuning. Just trying to get a feel for what is done.
When somebody says in the forum, or even in real life
"if your tune is good"....."with a good tune"
"I have no idea and it might actually blow, I've never done that, again, I really don't know. I'm going to say, with a good tune it should ect ect"
HEY, can I use 2000cc injectors man and idle good?
Ya with a good tune!
ok. thanks. cool!
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It depends one what stage your at bro. Like stage 3.5 and up and you'll need a good cutom tune. If your stage 3.25 and under you can get away with a totally legit ebay tune.The best one-stop shopping for German car parts and lifestyle: http://www.gutenparts.com/
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