I did when I was running my procharger. I still do my own tuning, I'm just running N/A now

 

ok I am goin to self tune as much as I can on my turbo setup this spring. I will have people to help but will try to do as much as I can alone. Did you tune with SCT?

 

I have the Sniper Commando kit. But as long as whatever software you have gives you complete access to everything in your PCM, you should be good as long as you do your homework.

 

what are the most important things that you suggest to look at?

I was going to un 8 to 9 psi, 12* of timing(at first), and a 11.5AFR at WOT.

 

first thing you need to do to prevent really bad **** is set your borderline spark table. Your stock borderline table will need to be re-scaled to reflect the increased % of load the car will see as well as increased rpm range depending on if you will be revving higher with the turbo. Rule of thumb is anything above like 85-90% load will be when you are actually building boost.

When running 10-11psi I had my borderline table set to 10* @ 2500rpm, 11* @ 3000rpm, 12* @ 4000rpm, 13* @ 5,000rpm, and 14* @ 6,000rpm. These are the values I used for everything above 85% load. This was of course with 91 octane fuel. I can only assume that a turbo setup would be similar if you had similar IATs and running similar boost levels.

Keeping the AFR in the 11.5 range is a good safe number. If you can get it to stay right around there, you will be good and safe. To do this, you must first set your stabilized open loop fuel table to the desired A/F ratio for your desired range (ie 11.5:1) instead of being scaled by load, this table should be scaled by your TPS volts and by RPM kind of like your spark borderline table. Set this to your desired A/F ratio for all rpms and anything above 2.44 volts from the TPS (I believe 2.7 volts and above is considered WOT).

Once you have done this, you can start making partial pulls while keeping an eye on the timing and AFR. the timing should not go abe what you have set in your borderline table. You should make adjustments to the fuel by adjusting your MAF transfer rate til your actual AFR matches what you have set or "commanded" in your stabilized open loop fuel table.

Sorry, there is a ton of information involved with tuning. And of course this only takes care of WOT tuning. As for drivability stuff, I don't even know where to begin on a turbo setup. I would highly suggest picking up this book and start reading up on it now.
It covers everything you need to know about tuning almost any type of setup. It is a must for a DIY tuner.

SA Design SA135 - SA Design Engine Management: Advanced Tuning Manuals - Overview - SummitRacing.com

And you definitely need a wideband oxygen sensor ans some good datalogging software to monitor everything. I'm sure the SCT stuff comes with a good datalogging program.

 

don't forget, the first thing you'll need is a sct pro racer package.

 

Yeah, you're not gonna do this on a handheld SCT LOL

 

I have the prp and there is a steep learning curve. there is a LOT more than wot afr and timing. get the lasota dvd, it will help you a lot. learn everything you can while you have the time putting the kit together

 

awesome thanks guys! It seems like I have A LOT to learn lol I am gettin that book for my Birthday on the 21th and will read the **** out of that!

 

I do all my own tuning, via laptop and software that I made. I program via latter logic and let the stock computer be tuned via SCT. If you need any things programed let me know I might be able to help you out. I now have 6 spare PLCs for indepentent engine management that I am willing to program for you and sell off.

For example, I can program one plc as a turbo timer and sell to you... PM me if you are interested...

 

thanks man...but I cant do all this free, its just time. A base would nice to go of off though.

 

I have the prp. You will the "tuners" wont help you very much.

 

sorry what?

 

wait so if i get the cord from my laptop to my car, i can tune the car with software on the internet?

 

u tune from the laptop to the car...

 

yes with a cord... what software would u use

 

How much is the SCT pro whatthefuckever software? If it costs much more than $600 then you need to sell your SCT handheld and get the Sniper Commando kit and a good wideband sensor and call it a day.

 

^ yea thats right everyone, sell your sct and go with the sniper horse **** :spankit .....afterall what works for one person on this horse **** forum works for everyone right?

 

Actually sct tech is the worst. After I get my x2 back from them (which they have had going on 3months for repair and have not responded one of my emails or phone calls) I'm gonna sell it and my prp and going with MS or Tweecer RT.


btw...anyone know how to setup a 2step with the prp?

 

If you already have the SCT X2 or X3, the SCT Pro Racer software is $349...

 

Is this Don From Lasota Racing? If it is..WELCOME. awsum prp cd btw.

With The pro racer package, you make a tune on your computer, load it on a sct device(x'cal 2, 3 etc) and then flash it on your car. I believe you have more control with the prp than the sniper

 

I second The MS. Just bought my 99 cobra w/ paxton and it has MS. I like it so far. What ever you get, read the manual and take your time. Be patient because you can get easily frustrated when starting out. Good luck with whatever software you choose!!

 

I have the full software for SCT as anyone elses tuner would have.

 

yeah I know there is a lot of learning to be had. But being 19 I think I will have enough time to learn the basics and try a little later on