67 1600 'simple' EFI conversion

[Gregs672000]

Like in a wreck where the ign is still on but the engine got stopped ,if not the pump still runs

oh I assure you, if theres a wreck where I cant turn off the key, burning alive is going to be my parting gift to myself.

Yep, me too I'm afraid. I did go to the wrecking yard many moons ago and took a Ford Escort inertia kill switch out of it (located in the trunk as I recall) with plans to wire it into my pump power line, but I've always been concerned that the Roadster's ride might be having it kill the pump every now and then... but I should install it...

[redroadster]

Soo ...when you crash into that preschool & or bus they're toast too ?
I'd image the ecu has a lead for a power relay shut off even pencil eraser sized failsafe chips do

[Daryl Smith]

The MegaSquirt shuts everything down (if wired to spec) if there is no crank signal from the engine, and I doubt the engine would stay running if a fuel line were compromised as it's tuned based on a certain amount of pressure, and if the pressure drops, the engine stops.
The impact switch is extra safety, and recommended.
I have one in my car trunk from some Ford product, too long ago to remember what.
Very simple 2 wire NC switch which opens on impact. Just break the power line somewhere near the fuel pump and splice in 2 wires to go to the switch, wherever you mount it (inside the trunk is best).
I think (could be wrong again) it is more applicable to a ruptured fuel tank, in which case the engine could keep running...hot exhaust...sparks...

[redroadster]

OK sounds like it's hooked right, but you should have a power relay ( it delays shutting off for 5-7 sec. )
As you could have water in gas ,air that shut it down temp and the cars doing 65 and a sharp curve ahead and no PS
causing a wreck ...not a 311 though

[Gregs672000]

Yes, I believe that's correct... the Microsquirt cycles the high pressure pump then waits for ignition, otherwise it would flood the engine. However, I do have a low pressure fuel pump that feeds my swirl tank that's just on by the key and not tied into the Microsquirt, so... that's the one that needs the interrupt. It doesn't put any fuel in the engine bay any more like with carbs... only transfers fuel from the main tank to the swirl tank, so it's relatively protected.

[polkadot]

Soo ...when you crash into that preschool & or bus they're toast too ?

I believe very strongly in taking responsibility for your own safety, almost as much as I believe that trying to be lecture people about safety on the internet is as useful as throwing rocks at the moon.

[Daryl Smith]

If you really think about it, in a crash scenario, it would be best to shut down all electrical power close to the battery to prevent any sparks igniting fuel. Would also kill the engine right away. In your average carburated car the engine could keep running with the fuel in the carb if the line/tank was compromised.
An impact switch to power relay would be a good safety addition to all of our cars.

[GeoffM]

Very cool build!!

[redroadster]

https://youtu.be/kf2CLsr-uMs?si=tyNWuELnDFnrx6JB
speaking lectricity view this

[23yrRebuild]

Jeepers !

[Daryl Smith]

Any updates?

"I had to make a new exhaust header to clear the fuel rail, and added a bung for the wideband o2 sensor (innovate lc2)"
Don't know how I missed this, but, quite interested in what you came up with for the header....any pictures?

[polkadot]

Ive been out of state for a few months, so not nearly as much progress as I would like. But I did throw some new fuel injectors in and took some timing out at idle, and its running VERY well, though hard to quantify how well with my uncalibrated butt dyno.

I made some new door cards and a rear shelf in a push to make the 'cabin' a slightly nicer place to be, installed two missing body to frame bolts, and cleaned about 40 pounds of old parts and tools from the trunk. some combination of those things eliminated all remaining squeaks!

I wish I had thought to get some pictures of the exhaust while the intake was out getting the new injectors, but the new manifold follows the basic pattern of the stock one, just curves down from the head much more aggressively to give as much clearance as possible to the injectors and fuel rail.

PXL_20241109_190521017.jpg

PXL_20241109_190420951.jpg

[mojorising84]

Nice to see some progress! Although I'll be honest, I'm not seeing much of the fuel injection stuff (which is the idea, so well done there!). The interior panels look amazing. Love me some diamond quilted leather. Pure class. I wonder if one could make a dash pad out of that stuff?

[akara]

This is so cool, I really love your creativity to keep the induction system looking stock, bravo!
I had no idea anyone made a distributor like that with an optical pickup for our Datsuns, Its so funny because I ended up coming up with a very similar solution mysellf but with a hall effect sensor instead of an optical pickup.
Love to see it coming together and working