Originally posted by JrTuner
I just have to say that do you know how many millions of dollars GM and all OE manufactures spend developing their engine management systems? And after spending all of that money they still aren't perfect hence the calibration updates that are constantly being released. If there was a aftermarket company willing to spend a fraction of that kind of money, the system would cost many times more than you paid for your car. The systems that are available today do a damn good job and what they were designed to do. There will always be a compromise. How about you actually use and tune one of there systems before you pass judgement on them and compare them to something that is not even in the same league.
Yes, I have a very good clue about what the oems spend, I've been thur an oem's emission lab., engine, and powertrain dyno areas, and have spent a fair amount of time discussing various aspects of what they go through. And I've seen some of what they use for data logging and have been able to draw my own conclusions about what I need, since I've seen true state of the art equipment. I know what 1 msec data sampling rates really look like. Also, what 100 channel data logger looks like that can record 20 of those channels a 1 msec sampling. Ya, I have a clue about what the oems do.
Yep, after doing a few thousand cars/trucks problems do crop up, and yes they update the calibrations, but that has nothing to do with the subject at hand. The aftermarkets also don't have to worry about the EPA and 100K mile warranties either.
So your saying that they can't match the oem ecms?. If they have to make so many compromises, why not just design software to run in the oem ecms, then?.
I've taken then time to develope my own source code for the 1227148 ecm, by removing the ROM in the ecm and then rewrote the code. I then changed some of the routines, and finally have changed it over to a true 3 bar MAP system. I say I but I had alot of help. So I've used a given ecm in Batch Fire, SEFI, MAF and MAP. So I would claim to have a little knowledge about how an EFI system works. Oh and I have a scanner logger, where I can watch all 256 RAM locations, and add 6 channels of additon inputs.
And the aftermarket folks claim to be so good, yet to date I have yet to see them approach the oems. They offer a pretty editor, and simplistic tuning, but for me I just don't see where their claims justify the expense. There has been mention of a possible few reasons for things, but nothing that I'd call as concrete data.
So why are faster processors really an issue?. I have several possible answers, but it would be just kind of nice to hear from someone that really knows why. Like I mentioned earlier the hardware is just incredibly slow and not that accurate, so why is there an actual need for the signal processing?. It's not like their running OBDII and having to basically run two systems with one just as a sanity check.