Well I've been running speed density for the last 6 weeks and I had it driving really well, but had a few issues.
The idle had a tendency to surge due to lean/rich spots in the map. I'd get it fixed and it might be right for a day or 2, but after a while it would always go back to having surging issues.
The tip in was never quite right. In order to get it to rev well in nuetral it would need a lot of accleration i/j correction, which in turn would make it quite rich on tip in when actually driving under load.
The idle issue was the most annoying and a while back I ordered a MAFT and a Z06 85m maf in case I couldn't get it solved in time for the NG.
Well last night I installed the MAFT (in 5 minutes!)(draw through) and set its base to 550s and the other low/mid/wot to 0. The car immediately fired and was drivable with zero correction on the emanage.
I set the a/f target back up on the emu and went for a drive. In less than 10 minutes I had the car running better than it has on speed density that I've been playing with for over a month.
I'm sure I was doing something wrong because many people have had success with the exact setup I was running, but either way I am super impressed with the MAFT.
It's default settings provide a driveable tune. It was only a bit lean in the mid range and a bit rich in the top end, but this is the same experience I had with 550s on my car and the stock maf.
Great product, it takes up zero space, requires no wire splicing (if you don't use rpm mode, I didn't because the EMU does my cell specific corrections), runs out of the box, and if I lost power with the 85mm maf I can't tell.
Between the two it is brain dead easy to tune. The a/f target works absolutely perfect when you are still using a maf and don't have to worry about the tip-in messing it up.
All in all the 2 combined are an expensive setup, but to me it is worth it to not be constantly screwing with my idle and tip-in.
Does anyone know if you can disable the a/f target when using the 2 step rev limit? I'm afraid it will destroy the tune if left on. I'll probably have to shut it off once I get the tune perfected.
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