new to efi

[sweet85chevy]

i am new to the efi world mainly do a alot of carbs but really cant afford the gas mileage i need to go to efi so i need alittle help i want to switch my sbc 350 carb over to efi what system would be the best to swap it over and still use HEI

[kjones6039]

There are any number of possibilities for a SBC. My first MS project was a TPI setup with HEI using MSII v3.0 and B&G code on my 79 Corvette. Before I moved on to my current project (in my signature) I was getting 26 mpg.

I have a couple of pics of my TPI project at : http://www.kandlservices.com/tpi

Good luck!

Ken

[sweet85chevy]

26 mpg you say what were you running for gears in the rear and what trans

[sweet85chevy]

also can i use any HEI i want

[Matt Cramer]

also can i use any HEI i want

Pretty much. With a 4 pin HEI module, the distributor advance mechanism would control timing; with a 7 or 8 pin HEI, the MS2 will have no problem controlling timing. We have a series of articles on converting a 350 from carbs to EFI - first with just a TBI swap, then with a TBI and ignition control, and finally stepping up to multi-port using a Stealth Ram.

http://www.DIYAutoTune.com/tech_article ... 1-nova.htm

[kjones6039]

26 mpg you say what were you running for gears in the rear and what trans

That was with a 3.55:1 rear end and TH700R4 transmission (.7:1overdrive)

Ken

[sweet85chevy]

also can i use any HEI i want

Pretty much. With a 4 pin HEI module, the distributor advance mechanism would control timing; with a 7 or 8 pin HEI, the MS2 will have no problem controlling timing. We have a series of articles on converting a 350 from carbs to EFI - first with just a TBI swap, then with a TBI and ignition control, and finally stepping up to multi-port using a Stealth Ram.

http://www.DIYAutoTune.com/tech_article ... 1-nova.htm

this helps thanks so do i have to get the relay board

[Matt Cramer]

The relay board is optional, although it makes wiring a bit easier. We often use it when wiring up a car not originally wired for EFI, but you can also use a conventional fuse block or find some sort of relay module in a junkyard. Your call.

[sweet85chevy]

ok thanks this helps alot

[convertables_10]

Im in the middle of swapping my 85 Jimmy over to Tbi injection controlled by Megasquirt here is the link to my build thread.
http://www.v8s10.org/forum/viewtopic.php?f=24&t=29063

[sweet85chevy]

do you have to use the stimulator

[trakkies]

do you have to use the stimulator

IMHO many faults are in the loom. Either actual wiring or connections. The stim can eliminate the MS as being the problem. I found a breakout box even more useful - allows you to actually check loom wiring easily. Or use a DB37 connector with tails for this as a cheaper option.

[sweet85chevy]

can i take a 4 pin HEI dizzy and put a different 7 pin module

[Matt Cramer]

can i take a 4 pin HEI dizzy and put a different 7 pin module

As long as you lock out the advance mechanism. Where I live, you can find oodles of 7 pin distributors for $20 each at the you-pull-it junkyards - look for TBI pickups and vans.

[convertables_10]

I have 2 of the 7 pin variants around the house and would be willing to let one go. I went edis instead.

[8974Ollie]

can i take a 4 pin HEI dizzy and put a different 7 pin module

Yes, I did for a traditional Pontiac engine where there are no EFI traditional Pontiac engines. How ever there are EFI versions of the sbc. visit a local Pick a part yard and look for an EFI version of a sbc engine.

[sweet85chevy]

can i take a 4 pin HEI dizzy and put a different 7 pin module

Yes, I did for a traditional Pontiac engine where there are no EFI traditional Pontiac engines. How ever there are EFI versions of the sbc. visit a local Pick a part yard and look for an EFI version of a sbc engine.

so i cant use the ones with the coil on top i have to use the tbi one

[Matt Cramer]

so i cant use the ones with the coil on top i have to use the tbi one

You can also use the TPI version, which does have a coil-in-cap setup.

[sweet85chevy]

so i cant use the ones with the coil on top i have to use the tbi one

You can also use the TPI version, which does have a coil-in-cap setup.

ok thanks