EFI tuners?

[art leong]

Originally Posted by buzzinhalfdozen

Don't recall who's system you're using but I'll bet there is a forum somewhere on the net. Sounds like you'll need to blend a TPSvsRPM map to the base map. Alot of systems seem to have this, however getting them right can be a bit tricky...I'm still tweeaking mine. If you understand how to blend the 2 tables....typically there is a TPS % blend table that will allow you to dictate how much of the TPS to use and in what range of the map. You then can manipulate the Idle portion using the Alpha N map for low RPM driving and let it switch over to the Load (MAP) table in the higher TPS ranges. Maybe start out with 100% TPS at say 25% and less throttle angle and maybe up to 2000-2500RPM at that point you should have a fairly stable MAP signal to allow the load map(MAPvsRPM) table to operate. Basically it will allow you to "drive" the car. Joe Oh and NO I do not consider myself a "tuner" just learned a few things by trial and lots of error.

I'm running a Vi-Pec V44 I'm in alpha-n mode (open loop?) not speed density (closed loop?). The wide band is for tuning after the run.
I have been on their forums (that is how I got it this far). One thing though is that there is very little drag racing where they are from (Australia and New Zealand).
Their engineers are supposed to be writing a map for me. The company has been very helpful even putting a 2 step function in the firmware for me.
At the PRI show their rep told me to use the 4D or 5D map like you said. But I'm not that savy "Yet". I'll work on it over the winter (8 weeks). I have learned how to program the cold start fuel enrichment. I'll be doing that to.

I try to gather as much info as I can then insert it in my brain (yes I have one. even though it may be small LOL).