EFI Upgrade

[JonnybravoM3]

My parts list that I've just ordered, I'm going for it....

- Holley HP EFI for Ford SBF 302 (Includes HP EFI ECU, Sensors Kit, Bosch Wideband, Wiring Harness)
- Holley Injector Set, 42lb (Set of 8)
- Holley Dual Sync Distributor
- MSD Digital 6A Ignition Control Box
- Fuel Rails Set, -6an
- Fuel Pressure Regulator
- Fuel Fittings Set
- Injector Bungs Set
- Fuel Check Valve
- 4-Barrel Throttle Body, Efi Conversion, IAC Valve, TPS

Wish me luck! JB

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[Horseplay]

You MUST give us a solid write-up on this conversion. Start to finish. Pics too!

 

[JonnybravoM3]

You MUST give us a solid write-up on this conversion. Start to finish. Pics too!

You got it

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[JonnybravoM3]

Here we go

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[Horseplay]

 

[JonnybravoM3]

My intake manifold.

You can notice the difference the intake runners. Some are dark and some are light. Obvious that some cylinders were running and some some were barely getting fuel.

Mechanic saying it looks like it was running on 4-5 cylinders. So should be a big difference with the 8 injector MPI set up hopefully.

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[Horseplay]

Is that carbon build-up around some intake ports I see? If so, it looks like you had some mis-adjusted valves or really bad valve timing. You shouldn't have signs of combustion in your intake runner at all. An intake valve should be fully seated long before the cylinder is fired. I have never seen something like that before.

Another thought might be to verify your firing order matched your engine/cam. Kinda of a really long shot but just noodling how you could be getting combustion effects in an intake runner.

You were running a simple throttle body style EFI. It just sprays fuel mixture into the manifold plenum from which all the cylinders draw. If an intake valve opens the cylinder will draw fuel the same as any other. You can't have one cylinder taking fuel and another not unless something is really screwed up with valve timing. I can't tell from your pics for sure but it appears to be a single plane design. Is it? Or is it a dual plane. If a dual plan do all the runners of each plane have the same color? Maybe you had a bad injector situation in the FiTech and it was only feeding one plane. This would be the only issue that could cause what you are describing that would be the fault of the FiTech. I think you had something more going wrong than you think...if that is really carbon I think I'm seeing in your pics.

 

[JonnybravoM3]

Is that carbon build-up around some intake ports I see? If so, it looks like you had some mis-adjusted valves or really bad valve timing. You shouldn't have signs of combustion in your intake runner at all. An intake valve should be fully seated long before the cylinder is fired. I have never seen something like that before.

Another thought might be to verify your firing order matched your engine/cam. Kinda of a really long shot but just noodling how you could be getting combustion effects in an intake runner.

You were running a simple throttle body style EFI. It just sprays fuel mixture into the manifold plenum from which all the cylinders draw. If an intake valve opens the cylinder will draw fuel the same as any other. You can't have one cylinder taking fuel and another not unless something is really screwed up with valve timing. I can't tell from your pics for sure but it appears to be a single plane design. Is it? Or is it a dual plane. If a dual plan do all the runners of each plane have the same color? Maybe you had a bad injector situation in the FiTech and it was only feeding one plane. This would be the only issue that could cause what you are describing that would be the fault of the FiTech. I think you had something more going wrong than you think...if that is really carbon I think I'm seeing in your pics.

It's a single plane that's already machined for injection.

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I've asked my mechanic for further clarification.

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[kb3]

I am with Terry on this one, there is no proper reason to have combustion residue in the intake manifold. Either bad valve seats, valve timing or significant backfires comes to mind. I will be curious to see what your mechanic says.

 

[JonnybravoM3]

Current status:

Machining the fuel rails and the intake manifold.

Injectors mounted. Work on the intake is nearly done. The fuel rail work is underway.

Mechanic shop 3d printed mounting brackets for the fuel rail for testing and mock up. Once finalised, will replicate the same from alum.

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[Grabber70Mach]

Looks good, I'm digging the look of those brackets.

 

[JonnybravoM3]

Manifold, Rails, injectors and throttle body mounted.

We’re relocating the heater hoses and are trying to finish off the fuel lines and fittings today.

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[JonnybravoM3]

Wiring nearing completion. Fuel pressure regulator in and sensor as well. Also another shot of the new PS pump replacement. Will be swapping out that blue screw for black as it sticks out like a sore thumb.

Issue with our cars is the lack of space we have. Next up will be fitting in the MSD box and the ECU.

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[Horseplay]

So far looks very clean. If that MSD box is going under the hood my suggestion would be to paint it black and have it disappear on the firewall. Tuck that fuel rail crossover hose back up toward the throttle body and hide it under an oval air cleaner. To most it would look like a stock engine. At least until they might notice the rails. Lookin' good!

 

[JonnybravoM3]

So far looks very clean. If that MSD box is going under the hood my suggestion would be to paint it black and have it disappear on the firewall. Tuck that fuel rail crossover hose back up toward the throttle body and hide it under an oval air cleaner. To most it would look like a stock engine. At least until they might notice the rails. Lookin' good!

Thanks for the great suggestions.

Actually imo the rails don't look terrible and match the heads and intake manifold and air cleaner nicely. I'm not a fan of the oval air cleaner look also, plus I think they will even look more discreet once the distrubutor is in and the spark plug wires are snaking around in there.

MSD box i ordered in black, though I'm wary that painting it black will not really fully camouflage it, the writing and lines will still show, but in black. So not sure whether it's really worth it or not!

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[Horseplay]

That air cleaner does a nice job of covering stuff up. It's larger in diameter than I expected. Not that anything needs hidden its just more fun on these old cars to make people try and find the modifications. The MSD box looks good. I was thinking the standard red one was on its way. That black one will nestle in nicely.
Looks like its about to come to life...again.

 

[JonnybravoM3]

Injector wiring harness ready and setup in progress.

MSD box mounted next to washer fluid bag.

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[Horseplay]

Harness looks very well constructed. Clean. That box is huge but at least it blends in with the background . I forgot how big those things are. Your first DIY job when this is done is to break out the hose and clean that engine bay. Dusty. Of course in your neck of the woods its probably tough to keep it from getting just as dusty fairly quickly, I'll bet.

Looks like you should be getting it back real soon, huh?

 

[JonnybravoM3]

Harness looks very well constructed. Clean. That box is huge but at least it blends in with the background . I forgot how big those things are. Your first DIY job when this is done is to break out the hose and clean that engine bay. Dusty. Of course in your neck of the woods its probably tough to keep it from getting just as dusty fairly quickly, I'll bet.

Looks like you should be getting it back real soon, huh?

Thanks yep usually my engine bay is spotless, but now that the car has been in the shop for a month, it's collected some dust and dirt but will be washed nicely before she comes home.

So plan is to hopefully start the car before the weekend, and get her on the dyno with the laptop and start the tuning process. Hope to have her back home by early next week.

Very excited, though it's already too hot here daytime (roughly 109F today) so I'm gonna be constrained perhaps to driving her on weekends early morning/night time, with minimal traffic until October!

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[JonnybravoM3]

Another update, ECU is in, under glove box next to transmission controller, pretty much everything is done, just finishing off wiring then put in the new dual-sync distributor and air cleaner and then she goes on the dyno. We've added extra wiring in case in future I wanted to replace the radiator and add extra fans, etc we can just link them up.

Now that I have a proper ECU, I'm considering doing a couple of tunes. I usually fill 98 octane but in case I'm unable to get to a station that sells that, I'm going to make a second tune for 91.

I'm also considering a 3rd tune setting just for fun, letting the car run a little more choppy and make some popcorn sounds when releasing the throttle at a certain rpm I enjoy that function on my RR Sport SVR, so I said why not have that as a setting on the mustang, for a laugh.

JB

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