Dominator EFI ECU and distributor

-
saskatchewan

saskatchewan

Active Member
Joined
Feb 15, 2015
Messages
41
Reaction score
1
Location
Saskatoon
I am contemplating doing an EFI set up on a slant six and I am looking for the best way of doing so such that I have the EFI talking to the distributor. Have any of you checked out this system from Holley?
Holley EFI 554-114 Dominator EFI ECU - Holley Performance Products

The sales pitch indicates that it may work with a stock electronic ignition system, "Custom settings can be configured to allow for use with many other applications". Any ideas if a Mopar electronic ignition would work with this? If not, any ideas of an aftermarket distributor that might work?

I was thinking about a similar set up as is in this article, but, without the 13.5-1 compression!!
Chrysler Slant Six Cylinder Engine - Mopar Muscle Magazine

As for an intake, I was thinking about using an Offenhauser rather than a Clifford, but, maybe the Clifford headers.

Thanks for the input!
 
Have you looked at the FiTech setups? If not search the threads here on FABO , complete throttle body efi with timing control for 1/2 the price of that ecu which will still need all the rest of the system to go with it.
 
We use the hp and dominators on our 3g hemi's. Is the goal just efi, or mpfi? Or advanced control or boost? I think the dominators is just about the priciest way to go about it. The hp has the same capabilities. We use it when we dont need the transmission control. But....if efi is the only goal...we could do a fitech, with an cdi box, and call it a day for about half the price. There is probably even a cheapo hei conversion somewhere for cheaper than a cdi box. Id love to get involved on the project. And I can even do a nice discount on the holley if you go that route. I do fabo breaks on fitech also.
 
The goal is tuned port injection. Not that I have not ruled out boost in the form of turbos, that is just a bit ambitious at this stage. In that past, I did a slant with an Offenhauser intake, Dutra Duals, a Holley 390 and a Pertronix ignition. I tried that combo with two different cam shafts and both worked well. The first cam was stock and the performance upgrade really surprised me. I had been totally scared by people telling me that it was too much carb, but, I thought it was perfect. There was never any bogging off the line. However, with the more performance cam, there was a lot more top end.
So, I am planning my second slant build and Johnny, any input is more than appreciated.
Just to clarify, is this the Fitech that you refer to, FiTech Fuel Injection
Would that supply the throttle body?
I would then get some fuel rail and drill the Offenhauser intake accept the injectors. Like they do at Rance Injection, MANIFOLD CONVERSION TYPES.
As for the ignition, would the Fitech include all the electronics for the fuel system to talk to the distributor? Would the CDI box be just a "dumb" box that allows for the Fitech to attach to the distributor, or, would it be like the MSD system that actually is the ECM? Could I use an old point distributor converted with a Pertronics ECM?

Thanks for all your help
 
a couple of quick answers , the FiTech unit is the complete setup , the injectors , ecu and timing are all built into the throttle body itself so it`s meant to be a simple bolt on conversion from carb to throttle body efi , they are advertising a tuned port injection kit but I haven`t seen any in use yet nor have I seen a price point .
 
I am not in a hurry, so, I can wait to see what there is in terms of their tuned port offering. I checked out their site, and they did mention that they will offer TPI kits including the manifold and one without the manifold, so, that might be something I can use.
As for throttle body injection, I am trying to get away from all the fuel distribution issues associated with the Slant Six. Folks like Aussiespeed have come up with an interesting solution to get the runners to be more or less "equal length", AS0024 Hurricane Aussiespeed 4 barrel Slant 6 Manifold | Aussiespeed Street & Racing Products Australia, but, that is a really big chunk of aluminum, and any TBI is going to be a long way from the valves. Not to mention, I still would have to fight with transmission kickdown etc.
If the Fitech folks have something that is a self contained throttle body with all ignition and fuel regulation, I could bolt it to a modified Offenhauser intake (injectors and fuel rail) + a set of headers, that would be my dream!!!
 
Here is a link to our fitech page, but they specialize in tbi ( which I think is perfect for a slant six)
FiTech Fuel Injection
but...if mpfi if your goal, then we are back to the holley hp, which is still cheaper than the dominators.
HP EFI ECU Holley Performance 554-113 - Pace Performance Parts
At the worst your could use a crank trigger. I dont know off the top of my head if a distributor can function on these as pickup and distribution. When im back in the office I can look up a holley 4150 throttle body (air only, no fuel) and the hp and harness and such. If thats the route you want to go. You may have to have a fuel rail custom made.. But I can get any kind if injector you need. Let me know. Let me know more, and I will touch base tues. Glad to help!
 
Thanks for the suggestions.
The 4150 throttle body looks like a good idea, but, I am not sure about cfm. They seem to often be around 1000 cfm, would that be too much? The guys running the MSD throttle body setups tell me that cfm does not matter that much with injection, unlike with a carburetor, however, I am just not sure.
For the fuel rail, I was thinking that i would have to get generic fuel rail and drill it to the appropriate injector spacings.
Aluminum Fuel Rail Stock, price per foot : atpturbo.com

The injectors are a bit of a mystery to me. What sort of flow would be appropriate? I am not building a 1000 hp engine, so, I was thinking something that is the same as an OEM V8 would work best. Any suggestions?

For modifying an intake manifold, I was thinking it would be best to mount the injectors at about a 45 degree angle, does that sound about right? Maybe a 30 degree angle would be more appropriate?
Here is an example from a Jeep inline FI conversion, Moses Ludel's 4WD Mechanix Magazine - Jeep CJ Inline Six Stroker Rebuild - Moses Ludel's 4WD Mechanix Magazine, HD Video Network and Forums.

The crank trigger is a possibility, but, I have to do some research to better understand how it would work.
DIYEFI.org Forum - View topic - slant six trigger wheel on the cheap.
 
saskatchewan said:
FItech port system.

Go Port EFI – FiTech Fuel Injection
Click to expand...
as you see, these are on a future product waiting list. fitech is so slammed with the orders on their TBI systems, that i would guess these are a long time out.

the massive efi TB CFMS are fairly irrelevant on an efi system. remember the fuel comes from computer programming...not the venturi effect and the "calibrated system of leaks" a carburetor uses for fuel disbursement.

as far as injector angle...i'm honestly not sure about that one... on my hemi, the injectors are vertical. on the LS they slant rearward..but not into the ports.

i can get about any injector you need. LS, HEMI, SRT4, or a universsal holley. they usually only cary in height and plug style.

we will both probably end up learning something in this project!
 
Call Rance at Rance EFI. That guy is a genius.
 
You must log in or register to reply here.
-

Back
Top