EFI to carb wiring.

[totheredline]

The fuel level senders/gauge, speedo and HVAC stuff should continue to work just fine even without the megasquirt. As far as the fuel pump goes, depends on how the P.O. set it up, though if it was fucked with all you have to do is wire the (purple?) wire up to the ignition switch. Either that or run it to a toggle switch in the dash.

Also, you'll have to get a fuel pressure regulator for carbs. Any one will do, I think my Holley one was $20 from Summit

But why are you switching from EFI to carb? Especially from a Megasquirt? Unless you're trying to out-hipster other peoples' builds or the Megasquirt isn't working right I don't see the point. Starting when it's cold will suck, fuel economy will suck, doing any sort of non linear spirited driving will suck. I had a carb on my 302 e30, but that was only because I didn't have any EFI parts and it would've cost me 3x as much to do a Megasquirt/EFI setup. IMO if you have a working (not to mention easily tunable aftermarket) EFI setup there's no reason to swap to a carb

Thanks for the replies guys.

I have my reasons for going carb. Mostly just the ease of tuning. I'm leaving for boot camp here in November ish, and I've still got a lot of work to do on the car. The PO kept the car stock so I was going to have to convert the car to MS controlling fuel only. Really the only things I had to run MS was the box, and a mechanical dizzy setup from an Ljet car. I still needed injectors, sensors ect. I know that this carb setup isn't going to make as much power, get better fuel economy, ect. Butttt I can dial in a holley in a day or two, I don't have to wire up a MS harness ect. With the carb I'll be able to have fun over the summer with the car. After I get through training I'll be converting it to a real standalone EFI system. I just don't have the time or money right now...


As far as wiring goes.

I should be able to get the stock temp gauge, level sensor and speedo to work? Can I tap the senders into the C101?

And for the fuel pump I can just use a manual switch in place of the relay?

[jalopi]

The fuel level senders/gauge, speedo and HVAC stuff should continue to work just fine even without the megasquirt. As far as the fuel pump goes, depends on how the P.O. set it up, though if it was fucked with all you have to do is wire the (purple?) wire up to the ignition switch. Either that or run it to a toggle switch in the dash.

Also, you'll have to get a fuel pressure regulator for carbs. Any one will do, I think my Holley one was $20 from Summit

But why are you switching from EFI to carb? Especially from a Megasquirt? Unless you're trying to out-hipster other peoples' builds or the Megasquirt isn't working right I don't see the point. Starting when it's cold will suck, fuel economy will suck, doing any sort of non linear spirited driving will suck. I had a carb on my 302 e30, but that was only because I didn't have any EFI parts and it would've cost me 3x as much to do a Megasquirt/EFI setup. IMO if you have a working (not to mention easily tunable aftermarket) EFI setup there's no reason to swap to a carb

[nando]

the DME has nothing to do with the fuel level sensors or gages, other than the tachometer. it has nothing to do with the blower motor either.

The problem will be the fuel pump. you can easily jump the relay so it's always on with the ignition, but that's not really safe. you really only want it running if the engine is running.

[totheredline]

Not really sure where to start but basically I decided to ditch megasquirt1 v2.2 and go with a Holley 4bbl+euro manifold for my high comp m30 build. Does anyone have experience with this kind of conversion. I'd like to keep the stock fuel pump, fuel level senders and gauge, speedo and blower motor/switches.