Krushansky911

I started a small thread already and got a bit of info, I will b running 2 350 tbi's on a 413 big block with 7747 ecu. I've heard their are 4 injector drivers in the 7747 but I've also heard that the extra 2 wires are just to help spread the current load of the 454 injs. I've heard that I can swap out the factory .1ohm resistors in the inj. Drivers for .05ohm or just double the .1ohm resistors and add some cooling to the transistors (where are the resistors on the board) . I've also been thinking about getting some external drivers (what kind and where to get them). And finally what if I just run two 90lb injs. in one tb with a vafpr to get enough fuel at high rpms and no injs. in the other and just have the extra tb to supply enough air at high rpms. Help me out, tell me what u think. I need to know how to run and tune four tb injs.

ladreamer

Dynamic EFI offers an option on their EBL Flash (which is based on the 7747) to drive 4 injectors.
http://www.dynamicefi.com/EBL_Flash.php
And here is a good page on injector driving from their site.
http://www.dynamicefi.com/InjectorDriving.php
I would not try to reinvent a way to do this. And the EBL Flash has flash memory, so no more chip burning. And it enables very good and fast datalogging.

Krushansky911

I checked out the links, so they offer a small board i install and I then tune the ecm from there? Would I need to buy a logger from moates aswell or does their kit take care of that, I want to run dual tbi's and tune it as easy as possible. This is the same price as the moates all in one so if its easier and drives four injs, i like it.

ladreamer

I think the 4 injector driver option has to be installed by Dynamic EFI, and of course it requires the EBL Flash computer. Go back and reread their website to be sure.
I'm running a different EBL Flash setup, the 'port mod', because I'm running port injection but with a slightly modified TBI harness. I use it and a laptop for data logging, no need for anything else. Your tuning will be much easier if you also get a wide band O2 and use this system to datalog it. I recommend you go back and read everything on the Dynamic EFI site, including the two tuning pages.
Are you going to use two IAC or modify the throttle bodies so that there is only one?

Krushansky911

Well if it makes it easier to tune and it does all that the moates all in one does and it's the same general price then it sounds like a better idea, I'm gunna run one iac. How do you like your setup? What about emulating?

RBob

iTrader: (1)

The 4-Injector Upgrade can be used/installed without the EBL Flash. The reason we word it so that it appears to be required, is that too many were purchasing the 4-Injector Upgrade and thinking they could run dual TBI's without tuning.

IOW, just plug it in and go. Got tired of telling them it doesn't work that way.

You can't really compare the Moates package to the EBL Flash system. Tuning the stock ECM you are stilling using the stock ECM firmware, along with having to piece together the ADS, XDF files, and the rest of the tuning package.

With the EBL Flash the ECM firmware is worlds better along with being documented. The ECU/XDF is supplied along with the WUD.

For the IAC's, run the two of them wired in parallel. Use one TPS, either one doesn't matter which.

RBob.

Krushansky911

Thanks rbob, I rly like the sound of the ebl, I'm VERY new to tbi tuning and I'm still absorbing all the info. Withe the Defi ebl will I be able to data log and tune on the fly? Or would I have to upgrade w extra hardware? I'm deffinately getting the ebl as opposed to the moates all in one. And I wonder if Defi gives military discount???😁

Krushansky911

Oh and what about forced induction with the ebl? Just a down the road thought.

RBob

iTrader: (1)

No tuning on the fly with the EBL systems. Folks new to tuning shouldn't use a feature such as that. As the tune will end up so far off they will be starting over.

The What's Up Display (WUD) is sued for data logging, flashing in the new BIN, analysis, and observation of the engine data.

The EBL systems support a 2 bar MAP for up to 15 psi of boost. And a 3 bar MAP for up to 30 psi of boost.

RBob.

Krushansky911

So basically it does everything that the moates system does except on the fly tuning (which i shouldn't b doing anyway) and it does it better!! And for about the same price. Cool sign me up.

Krushansky911

What exactly does the four injector upgrade consist of and why is it more expensie than the 8inj tpi upgrade? Is there any way I can get the ebl upgrade and do the 4inj mod myself?

RBob

iTrader: (1)

Both the Port Mod and the 4-Injector Mod need to be installed here. The 4-Inj Mod is higher in cost as the components and labor cost is greater.

The 4-Inj Mod allows you to run four TBI injectors. Such as dual 2-bbl units, or a Holley 4-bbl with Delphi injectors.

The Port Mod is for running a port injection setup. Such as TPI, HSR, MiniRam, and so on. With this mod it will not run a TBI setup.

RBob.

Krushansky911

Awesome,and thanks for the info. I will be saving the funds and getting your setup. I rly like the sound of it. And if anyone wants to throw in some first hand stories,that'd be great. Also I think dynamic will be VERY helpful in my learning/tuning stage.

S10K20

Can the EBL with the 4 injector upgrade run just 2

RBob

iTrader: (1)

Yes, wire the two injectors in parallel and connect them to one of the drivers. Can usually do this at the ECM by moving the terminal/wire for one of the injectors.

RBob.

S10K20

My EBL will be in tomarrow and goin to use it on a stock engine to learn everything on before its runs 383. I'm just wanting to make sure I get it right being its got the 4 injector upgrade and only runing the 2 injectors
So only using one driver I would connect one injector to D16 and other to D15?
Or one pin from one driver to one injector and the other injector from secound driver, D16 and other D14?

RBob

iTrader: (1)

Connect an injector to D15 and the other to D16. This will put them in parallel on driver A.

Pins D14 and C15 will then be left open (driver B).

RBob.

S10K20

Thank you RBob