Quote:
Originally Posted by ecoli
I have tuned a few and it usually works. I have used it in speed density mode and then just some in basic mode with a factory MAS, kinda like an SAFC with timing control. Sometimes the timing control doesn't work right though and it's hard to tell, unless you have it on a dyno and can see if making a huge change to the timing does anything. It is somewhat of a mess though. To tune in speed density, you pretty have to use Tuner Pro, to tune the VE Map. So you might have a serial adapter and wires for the MAFT Pro, a serial adapter and wires for a datalogger and maybe even an emulator or chip burner, if you are modding the EPROM at the same time too. The timing control harness needs to be ordered seperate. The MAFT Pro boost control is pretty easy to use though.
It isn't going to make any more power than a DSMLink with GM MAF and the DSMLink setup would be much easier to deal with setup wise, easier to tune, more consistant, and adapt to changes from mods easier. Speed density doesn't offer huge benefits over a MAS setup for most people, and it has disadvantages.
There are hacks to do native speed density with just an EPROM ECU also. It isn't the most refined thing, but people are running it. And doing an EPROM tune(MAS or SD) has better timing control than DSMLink or the MAFT Pro.
Closed loop WOT is neat, but it can be bad, if the wideband fails. If it fails, hopefully it sends a lean A/F to the MAFT Pro, so it just tries to add fuel, instead of trying to lean things out from a false O2 reading. I haven't used it on the MAFT Pro at all, but on systems like the AEM EMS, you can set it so that it could say 15% fuel if needed, but only allow it to pull out 5%.
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Are you saying that street tuning is out of the question? The way I understood is that I could use it's logging program in conjunction with DSM chips knock gauge. Does it log fuel trims? The gauge I know isn't that great so I would keep a logger around I guess. I get the the feeling I might be better off keeping link.
The whole reason I would even consider ditching link is the speed density option. I drive year round and have never had good luck with keeping a good tune good through out the seasons. I was thinking that this would stop the need for the occational retune. I know its not that hard to add alittle here and there but I'd rather just a IAT do it for me. Or am I way out of line there?
I also know I can use MAFT Pro in conjuntion with DSM Link. But if I'm going to keep link I'd rather not be spending the 600 on speed density if it's not going to be a benifit.