Honestly.. I love that paint color anyone know what it may be? Looks almost like wood in certain lights.

lol go check it out and point out how shitty the car is, test drive and beat the hell out of it, then lowball the shit out of him and leave

I couldn't make myself sit in it.




Sooo.... I just finished WOT tuning. I leaned it out to 12.7:1 in Power Enrichment (WOT) and did some basic spark table adjustments. It just picked up at least 40hp. Night and day difference. It pulls hard to my new shift point of 6600rpm. Fuel cut is set at 6800. 28 degrees of timing in all of the upper cells. No knock retard on ethanol free 93 octane. I might bump the timing up to 30 and see what happens. It pulls so smooth now from 2000rpm to 6600rpm it feels like a different car. First and second gear were useless in the 20 something degree air. Because of that I had to break every posted speed limit known to man.







This post was edited by FMX_89 on Jan 30 2014 11:27pm

Man I would love to start learning about tuning

Yeah same. I have no idea how to do any of that lol

The first step is to know what all of the sensors for the engine are, what they do, and their cause and effect relationship with each other. Then you need to learn their operating ranges. After that you have to understand what the engine is trying to do vs what you want it to do. Then you have to know what to change to make that happen. That part is no different than tuning a carb, just more involved because there is so much more you can change. Once you have all of that down you have to learn the tuning software. That is where most people get bogged down or are afraid to try.

There are around 150 tables like the VE table I posted that can be changed for the LS1 with the 2000 operating system like mine.

As an example the one I posted is Primary VE (the numbers) VS RPM VS MAP (in kpa)


RPM is self explanatory and kpa is manifold vacuum. The lower the kpa the higher the vacuum. The other end of the scale is atmospheric pressure which you only see at WOT. VE is Volumetric Efficiency. When the computer is not using the MAF for airflow calculations it fuels based on the numbers set in this table. It references the RPM it is at and the manifold pressure it is at then looks to the VE number (which is just a percentage of engine efficiency at that point) to calculate airflow. This obviously changes with a cam or heads or exhaust etc.

To tune this, you fool the computer into not using the MAF. You set the MAF failure frequency (in Hz) to 0. That will tell the computer the MAF is faulty all the time. Then you have to configure a histogram in the VCM scanner to read long term fuel trims vs RPM vs MAP. As you drive around it will populate that histogram with you fuel trims whether they be positive or negative. After you are done, you copy that histogram, and paste it into the VE table, multiplying by %. That will change each cell that has a fuel trim (computer adjusting fueling up or down based on narrowband O2's) by the percentage it is off. As you repeat this 4,5, or more times your fuel trims will decrease. You want to get them within +/- 5% for the best drivability.

After you get that dialed in you do basically the same thing with the MAF. You set the failure frequency back to stock, and the low RPM enable for the MAF to 200rpm. That makes it use the MAF all the time and ignore VE. The same process of logging VE and multiplying by % follows.


Then you have to tune WOT A/F, and move on to idle and the myriad of tables for airflow. Idle tuning with a big cam can take 5x as long as everything else put together.

This post was edited by FMX_89 on Jan 31 2014 12:13pm

what not to do to a lambo:

http://www.epiccarnage.com/epic-wtf-man-hacks-up-new-lamborghini-and-turns-it-into-a-mustang/



to



to

i dont even know what to say to that.

lol idk who would want their 200k car to look like a 20k mustang

I would of refused to work on the car if I was that shop

This post was edited by Epicexecution on Feb 2 2014 06:49pm