check out my tune... it sucks a$$. help me not be blown any more

[farlsmagee6]

I NEED HELP!

finally i get a glimpse at the $hitty tune that blew the motor.



obviously... no timing adjustments. its the one that's covered up because there is nothing there anyway.

this tune was for the greddy setup with a few extras. it lasted all of two months (im surprised it lasted that long).

20g turbo3 inch downpipe and exhaust plus intercooler370cc injectors on stock MAFetc,etc

since then, I've gone with a forged bottom end and a complete rebuild. turbo has been rebuilt and everything is back together. got it cranked up and it is at least running now...

the question is how to estimate a decent injector and timing map where i could at least drive the car around to break in the motor before I get it tuned. im not planning on boosting it or anything...

I've read around and done some calculations and come up with some estimates, but I wanted to see if anyone else out there had a map they could share. i know this is apparently like asking for the holy grail... but someone come through for me here... any help at all would be helpful - i just dont want to have to go all the way back to stock just to break in the motor

[turbo2nr]

basically on the ignition map where you start hitting boost subtract .75degrees timing per ever psi as rpm increases. that should be safe, then after once your on the dyno you can take away timing (advance it) until you hit peak torque)

as for the fuel the formula is Formula = stock 270cc divided by new injector (ex nismo 555cc) = 0.66cc x 100 = 48.6%.

so you need to subtract 48% fuel for car to idel and perform close to stock.

form there just keep making the percentage less to increase fuel therefor increasing a/f mixture making it more rich, you would want to do this on boost.

be careful and take your time!

baby steps dont make drastic changes, dont push on the car make a change and see how the car reacts before making more changes..

[bruinbear714]

The problem with tuning with the emanage blue is that the scale is based on TPS vs. RPM. That doesn't necessarily translate to load vs. RPM due to the fact that you can be at full throttle without any boost at any RPM.

I would tune that TPS vs RPM map by figuring out what the maximum possible boost is at any given TPS level and use that modify the ignition map.

[farlsmagee6]

well i dont have it in that view, but you can tune it based on voltage from the maf... but even so how would you estimate boost at any given throttle (or voltage)? ive tried reading compressor maps and what not, but i just fail at life apparently.

all i want to make sure of is that i dont blow this motor before i break it in or get it to the tuner. the estimated tune doesnt have to be good... just good enough for a few weeks of easy drivin

[LEMHEAD16]

Are you using the pressure sensor with the emanage? If not get it in a hurry, the pressure sensor makes the EM much easier to tune with.

With the PS you can add fuel and subtract timing based on boost instead of TPS and RPM

[lrb_2000]

I wouldn't recommend an easy break in. I hit full boost (8psi) and 7k rpms within the first mile with my built KA.. but it's up to you. You lose power in the long run by babying your engine for the break in. I'd get it tuned right away if I were you. The right way.

[farlsmagee6]

you would recommend an immediate tune on a fresh motor? ive read conflicting opinions on how to break in a motor...

[lrb_2000]

well, a decent one. At least with a wideband. at low boost, timing shouldn't be too much of an issue, as long as it's retarded a little I would imagine.

[farlsmagee6]

just an update... i got everything put back together and cranked her up about two weeks ago. after a few slight adjustments, the car is running just right at low boost. I pulled timing back at the distributor and went mostly along with the fuel adjustments I had in the previous tune...

no problems boosting to 10psi... so all is well for now.

i got my pressure sensor and ignition harness in yesterday so ill be plugging those up this weekend, but just one question...

I know the good rule of thumb for timing is to pull .75 degrees per psi of boost. What is a good rule of thumb for adding fuel in emanage? The additional injection map deals with percentages... how does that convert to psi of fuel? I know some people use the 9 to 1 or 10 to 1 rule for fuel to boost (rrfpr method) but I dont know how to convert that into emanage speak...

any help?

[farlsmagee6]

anyone? I've looked all over the web but can't figure out the logic of how the percentage adder on the additional injection map works. does the percentage mean that it is adding fuel? or does it correspond to injector duty? or is it something else?

also... if it as I think it is and defining the injector duty, how do you convert duty to fuel consumption? ... hehe... duty