20b?
 

Anyone running a 20B with one of these things?

I've downloaded the V4.0+ brochure from the Wolf3D site, and it only mentioned 4 "standard" fuel injector outputs. Does it steal outputs from somewhere else? Or does it run batch + staged with just the 4 standard FI outputs?




-Ted

It has 4+1 injector outputs just like the regular 4.0, which disappointed those of us who heard the rumors that it would have 8 injector outputs to enable it to run SFI on a V8. The only creative use of the injector drivers allowed by the software is to use the secondary injector output as a primary output on 5 and 10 cylinder engines, which does nothing for us as rotorheads. On a 20B, the Wolf injector outputs would look something like this:
1: Primary Injector(s) Rotor 1
2: Primary injector(s) Rotor 2
3: Primary Injector(s) Rotor 3
4: Not Used
S: Secondary Injectors (Batch fired as a percentage of the primaries)

The Plus model is really more for piston engine applications that use the 4-wire stepper motor for idle control, but for rotorheads it does have the added ability to run split timing on a 3-rotor engine, and it has a few more aux outputs.

I just sold my regular Wolf3D V4 because it looks like I will be moving to a state that requires emissions testing, and I would like an EMS that will run split timing. Right now it looks like I will get the Wolf3D V4 Plus, but I am also looking at the Haltech E11, and maybe the new Motec M600 now that they have decided to make an affordable EMS that uses an OS from this century, lol. It's going to be a few more months before I can work on my 20B project again, so there is no telling what will be on the market by then. :)

Ah, I was wondering if it was able to "steal" the spare (2?) outputs.
So when the primaries are firing, is it in sequential mode?
When the secondaries kick in, are the primaries switched to batch and all injectors fired in batch?

I'm finally tackling my 20B EMS section, so I guess I want to just fill in the blanks. :)

http://fc3spro.com/TECH/SWAP/COSMO/20b.html



-Ted

No

Not necessarily. Normally, the Wolf is in batch fire mode. I haven't tried the SFI function yet, but from what I can tell of the software, the SFI is nothing more than sequencing each individual injector output. All 5 of the injector outputs have their own trim and sequence value settings in the software. This would indicate to me that any configuration that does not have more than one rotor or piston per injector output (1-5 cylinders/rotors without staged injectors) could run in SFI mode. However, Wolf only lists 4 cylinders for the sequential or banked injection, and 6 & 8 cylinders for banked injection, so I may not understand the situation very well.

The Wolf is rather strange in that the staged secondaries never "kick in". They are run at a percentage of the primaries all of the time, which means that they begin injecting when their minimum pulsewidth is reached. The advantage of this is that the transition is very smooth. The disadvantage is that larger injectors may be required because the secondaries will never reach the max pulsewidth of the primaries. Anyway, to answer your question, I doubt the primaries go to batch fire when the secondaries are on because the secondaries are technically always on.

Why? You know the stats are going to change on at least one EMS each month, hehehe.

OK, I have some input then for the Wolf load sensing that isn't very clear in the manual:

Load sensing = MAP, MAF, or TPS
Load sensing for transients = MAP, MAF, or TPS
Any combination is possible. For example: Load MAP / Transient TPS, Load TPS / Transient TPS, Load MAF / Transient MAP, etc. Also, you could say that there is a MAP+TPS or MAF+TPS load function available if you consider the Idle Lock function. Confused yet? :)