I did a search looking over the info for the Holley Commander 950 ECM. I was wanting to build an engine with the Stealth Ram but am not sure if the 950 is the best way to control it. For one it is a batch fire system, would prefer a sequential pattern.

It also looks as though accels' system which is also batch.
Basically I am looking for a system that is easy to control and change, is flexible (if I one day decide to power charge or go with N20). But also one that doesn't have limited features that prevent you from changing things that you may want to.

And of course all at a reasonable price

 

Accel 7.0 can be run as sequntial but unless you are reving the **** out of the thing you aren't going to notice a difference.


Zac

 

Accel is the way for you to go. DFIV7 can be run sequential (although no major benefit except emissions) If in the
future you decide to go nitrous it has the enrichment/ timing program built in. It also has the capability to go wideband. We
did a sequential tunedport with a p1sc but ended up going back
to batch. The dual sync distributer from accel is a disaster right
now. The wires are to small and keep breaking.

 

I am surprised. I would have thought that there would have been a more significant benifit to seq. over batch.

 

you really only need seq. for higher rpm's

 

With the larger injectors I find batch better.
With huge may SEFI would be needed.
I'm running 55 PPH injectors in my 231 V6.

 

Just to add fuel to the fire

FAST has sequential systems...And are easier to tune...ALSO if you wanted to run batch now and would want sequential later They will upgrade it for you...And they also have an individual cylinder timing/fuel rate option....You can essentially Tune each cylinder individually*** that can help if your using say a front feeding manidfold where NA the closer cylinders get MORE air...**

Electromotive TEC3 is Batch/Staged/and sequential...at the click of the mouse to change it.. From what Im told it supposed to be fairly user friendly..

 

If you are worried about fuel distribution through the Stealth Ram because it is a front feeding manifold, you can run a DFI VIC (Variable Injector Controller) that runs off batch fire but can add trim to each individual injector up to 25%. The TPIS Miniram I run has always had a problem with the rear cylinders running more than the front cylinders. I lean out the entire fuel map on my DFI till the rear injectors run where they’re supposed to be but that would lean out the front cylinders. I use the VIC to add about 8% more fuel to number 1 and 2 cylinders, about 5% more to 3 and 4, 3% to number 5 and 6 and 7 and 8 are left at around 0 – 1%. Hope this helps.

 

Yeah that works fine as a band aid BUT I would not advise that someone go find or BUY an OLDER batch system and then add a 500 dollar injector controller...Typically something BAtch like a HAltech or gen 6 dfi get around 600 used...so for 1,100 they have an OLD .."limited" system...or for a few hunderd more they have much newer and better technology..

The vic is good for what you are talking about or running larger injectors with a stock ECU or OLD ECU you already have but I would not advise someone to go buy an OLD system and all the equipment and headaches with add ons to make it work..The differences in dollars at that point dont makje it worth it...I mean You could buy a FAST system WITHOUT WB02 for the same money...DIfference is later on if you want WB02 or SFI or individual cylinder timing/fuel control you just buy the upgrade..

Basically GOOD idea if you have an old or stock ECU and dont plan on ever running faster....

Bad idea if your deciding on buying a new setup..Because the cost difference does not make it worthwhile....


Im sure many will argue with me...but if the ultimate answer was to run GEN 6 or stock with a VIC then everyone in the racing world would not be buying $5000 Motec sytems..and accell would have had no reason to develop gen7 dfi..

 

I've run the same ecm and code in Batch and SEFI.
Some of the oems allow for switching things in the code to do that.

So far Batch has been better for drivibility then SEFI.
My theory is that with firing the injectors twice as often provides better atomization. But, this is for off road use.

I'm using 55 PPH injectors on a little 231 turbo car.