Hi...

The last days I've spending a lot of hours to decide If I should go With accel DFI 7.0 or burning my own PROMS.

- 7.0 is a really nice tool but costs alot! I'm not ready to pay that $$ yet.....

So I'll guess burning is the way to go..

I've read alot of post and done a lot of research on this board (GREAT POSTS).

The only thing I dont know yet.....Will my MAF setup handle the power my engine is making or must I switch to SD before I get into PROM BURNING ?.......

And what about WOT tuning with MAF ECM? in what table do I do that?



Right now the car has some major tuning issues that MUST be solved so I'm in a hurry!!!!

I scanned my car a few days ago it it reach 255g/sek at 3800 rpm......I'll do it again soon to verify......

 

You don't HAVE to go SD. In fact, you can use virtually ALL of the same equipment for both, depending on what you will be using. If you chose TunerCat, you will need a new TDF (costs $20) if you swap from MAF to SD. So you could start with the MAF system and later convert to SD and not incur any significant cost (other than the new ECM, Memcal, connectors and MAP sensor).

Though you are most likely going to max the MAF, you can compensate and extra fuel by the "PE %Change AF ratio Vs RPM" table. Generally somewhere between 4,500- 5,200 rpm is when you need to maxing the MAF (depending on your setup).

I have a buddy running a very serious 383 and he uses MAF. We've had very good luck tuning it. His MAF sensor is starting to go, so we are going to conver to SD because it's cheaper to convert to SD (using junkyard parts) than buying a new MAF. But if his MAF hadn't started going, he'd probably stay with MAF (though he does like the idea of removing that restriction in the intake also). We got it tuned that well.

There are advantages to SD and once you get into tuning the VE Tables (this is what scares most people and it isn't very hard btw) SD is actually an easier system to tune IMO. The biggest advantage of SD (besides removing that restriction and never having to replace an expensive MAF sensor), is you can tune it to work consistent over a wider range of operating conditions.

MAF can be affected by elevation, ambient air temp and humidity once perfectly tuned. SD can be specifically tuned for the different elevation and ambient air temps.