They calculate positive intake pressure very similarly to the way the turbo buick guys do, by multiplying the current MAF Table value by the current MAF Table Scaler, through this determined reference value, it is then filtered by the program to track load changes at a much slower rate than the one used to calculate the current LV8...

 

I had $59 in it and it was great (as naturally aspirated at the time). The last thing I had to do before the turbo install was upgrade to larger injectors. It was just surge in AFR from 10.0 to 20.0 non stop with the new injectors installed. Nothing I did resolved the issue other than putting the stock injectors back on. I didn't have any others to try and I wasn't about to give up a brand new set of 65 lb/hr Precision Turbo injectors.


I acquired an older, pre-XFI FAST system that had the sequential injection option on it. Unfortunately I found out that meant no fan or fuel pump control and I believe some other limitations due to the limited number of I/O ports. There was no option to return it to batch fire mode to be able to get fan and fuel pump control. I more or less planned to go to BS3 or XFI, just came across a sweet deal on this and figured I could use it to help pay for the new box when the time came.

For my AC, I've been adding 100 rpm to the idle table in the hot months. Helps a lot but then the car is always pushing at lights if the AC is off, and when it's ON it still stalls out at times.

 

What was the spark reference angle in your $59, and where did you set your base timing...?

 

I'm really not sure since it's been a few years. I think base was 8 degrees. All I know was everything was perfect with the stock injectors. Ran my best time N/A on the car with $59 and drove it for months without complaint. Just when I went to the 65's it went to crap. I even swapped back and forth a few times. This is what it did

Steve

 

Did you adjust the injector vs batt compensation table? This seems to cause/reduce surging, especially when switching to injectors very dis-similar to the stock injectors, and larger injectors just seem to make it worse.

BTW, your video is set to "private."

 

oops... fixed!

I did a little bit of everything for the two months I fought with it. Really don't remember much though.. I didn't want to remember the crap I went through with it LOL

 

On your megasquirt, have you considered adding a relay on a spare analog input for your a/c request?

You know, the documentation is kinda iffy, but the more I read the board schematics and what documentation there is, the more I realize how powerful the MS actually is.

-- Joe

 

As someone who has gone through a number of systems, I am now running a Holley HP. Best system I ever played with. My car has a SBC with a 20lb ProCharger. I run a Meth/Water system with the Holley. It has a built in 2 step and total fan control(shuts off fans automatically on a run) You can run your NOS either straight or progressive. This is with the base HP system, $1500 for ECM,wiring harness and sensors.
The self learn features make it a snap to get running and not spend hours just to get an idle. Sequential injection and individual cyl timing control if needed. It can run low or high impedance injectors with ecm control of a boost fuel pump if needed. $1500 is not cheap but I got rid of a Meth/Water controller, 2 step box and a whole bunch of wiring.
Fairly large user base from 250hp to 1800hp. Take your old engine harness out and plug in Holley harness for TPI. It data logs everything including fuel and oil pressure. It was one of the easiest systems to learn for me. I have tuned using the Ostrich, 950 Commander and LS PCM. They all require a lot of skill in tuning and are easy to go in the wrong direction and hurt a motor esp with power adders. The Holley is not fool proof, BUT, will put a new tuner miles ahead in getting their engine up and running well.

This is aimed more towards the OP then those experienced tuners that have posted in this thread.

 

I have looked at the Holley and the XFI extensively and will eventually go to one of them. For my budget now though im pretty sure im gonna go with the EBL cause it retains all my original wiring and I can add a wideband o2 for tuning. All for less than 500$. That way i can at least get it running decent, learn something about tuning, and spend some money on some much needed suspension and frame ties before i twist a perfectly good car to pieces if it ever hooked up.

At the moment im also looking into ditching the tpi and going to a single plane setup. Think this might be the best option for me cause i really want to run fastest mile and road courses. I wanna give big red camaro a run for his money. LOL Move over and give the younger camaro generation a chance is what i say!!