Tuning Techniques.

[Snotrocket]

Wondering if we could start a little discussion on tuning techniques. I now understand how to unlock power from the car by upping boost and running slightly leaner ect. But now i would like to learn things like how to tune for more HP for example. I see guys tuning to up horsepower by sacrificing torque. How is this accomplished? What other techniques are used to tune for specific results?

[Kiyomi]

I was talking with a genesis owner today, and he said that a reflash tune, could get him easily over 300 hp by raising the boost safely if he had a fmic. I was like what! if thats the case, go for the fmic and raise the boost>? just wondering

[Snotrocket]

I was talking with a genesis owner today, and he said that a reflash tune, could get him easily over 300 hp by raising the boost safely if he had a fmic. I was like what! if thats the case, go for the fmic and raise the boost>? just wondering

When you compress air it heats up significantly. The more you compress the hotter it gets. An intercooler by design cools this compressed air before sending it into the intake manifold. Better FMIC allows you to cool this air more efficiently thus increasing your limits for greater pressure. Definitely not 300 whp with a fmic and a tune tho on a genesis.

[fywdyl]

Prob meant 300 chp not whp.

[SSmoked]

sure u can up the boost and play with the richer/leaner AFR, but than ull knock and misfire. IMO get a professional to tune ur car, someone who has tuned that plaform soo many times, and have them do it on a dyno. do it proper. i dont understand how some of u speed3 guys run off the shelf maps. i would crap my pants running that, there generic to the platform and not for YOUR own car.
not sure about a genesis but my car can do 300whp with just a tune and no bolt ons. than again my car comes factory with a fmic.

[BlueStreak]

Another way to get more power in the mid-range to top end is to add timing. I generally add .5 to 1 degree at a time and monitor the knock sensor as a means of indicating I've gone too far.

On a K04 powered car with no meth, you can probably reach 12 degrees maximum timing. I suggest reading up on how to add timing and what a timing curve should look like before tackling this as it is probably the easiest way to grenade the motor.

[BlueStreak]

sure u can up the boost and play with the richer/leaner AFR, but than ull knock and misfire. IMO get a professional to tune ur car, someone who has tuned that plaform soo many times, and have them do it on a dyno. do it proper. i dont understand how some of u speed3 guys run off the shelf maps. i would crap my pants running that, there generic to the platform and not for YOUR own car.
not sure about a genesis but my car can do 300whp with just a tune and no bolt ons. than again my car comes factory with a fmic.

Not necessarily. If you know what you're doing, there won't be a problem.

The off the shelf maps are very effective at making more power (provided you calibrate the MAF properly) and still offer a very large safety margin.

[breakfasteatre]

regarding the maf calib. Decided to redo the calibration to see if there were any changes to be made. Well, forgot to log maf voltage so that half an hour of runs was a waste of time :(

[fywdyl]

sure u can up the boost and play with the richer/leaner AFR, but than ull knock and misfire. IMO get a professional to tune ur car, someone who has tuned that plaform soo many times, and have them do it on a dyno. do it proper. i dont understand how some of u speed3 guys run off the shelf maps. i would crap my pants running that, there generic to the platform and not for YOUR own car.
not sure about a genesis but my car can do 300whp with just a tune and no bolt ons. than again my car comes factory with a fmic.

Totally understand your concern and I would be concerned too, but most of the ms3 guys do tons and tons of reading before deciding on a product and the cobb AP has proven to be an awesome product. Also, most OTS tunes are very conservative, thus the reason Snotrocket posted this post. :)

[Snotrocket]

I'm very confident in my ability to street tune safely. I never do anything without months of research and keep everything well with in limits. I dont experience any knock (even in extreme heat) or any over boosting. I may be straining on the k04 slightly but I plan on going BT next summer anyway.

[loki]

regarding the maf calib. Decided to redo the calibration to see if there were any changes to be made. Well, forgot to log maf voltage so that half an hour of runs was a waste of time :(

why do you need the MAF voltage?

it all seems to revolve around the LTFT and mass airflow values.

[Snotrocket]

why do you need the MAF voltage?
I never logged it...

[fywdyl]

MAF voltage for the MAF calibration. You need to know where the breakpoints are.

[Snotrocket]

MAF voltage really doesnt need to be logged.... Break points are predetermined and the same for everyone.

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i dont know why that copied so crappy but you get the point.

[fywdyl]

Unless your breakpoints are different... which was the case for me.

[loki]

MAF voltage for the MAF calibration. You need to know where the breakpoints are.

see in that tuning guide off MSF they use the g/s for the breakpoints.

[Fobio]

see in that tuning guide off MSF they use the g/s for the breakpoints.

The breakpoints use "g/s" as markers, and those breakpoints translate into the MAF V that the "g/s" markers correspond to on the MAF Sensor Table A/B.

[Snotrocket]

Unless your breakpoints are different... which was the case for me.

I didnt think that was possible....

[Fobio]

I didnt think that was possible....

You can change your breakpoint markers in ATR. Whether it is actually effective or not, I can not say definitively. I run non-OTS break-points for running the 3071, but I don't think it makes any difference. With the stock turbo, I'd recommend leaving them as they are on the OTS map.

[Snotrocket]

Ahh cool. Didn't realize. How did yours get changed fywdyl? MAF voltage is still irrelevant though. Not necessary to log.

[Snotrocket]

Im trying to build boost sooner currently in this tune im working on but im also experiencing some spiking (as to be expected) . The spiking seems to happen more between 3500-4500. What im going to try is increasing WG at 3000 but then decreasing a bit between 3500-4500.. Will i encounter issues with this?