Ok so if I go with Turbo, Batch Fire MPFI with a mega squirt controller, What should I pull sensors from what junkyard car, or does the mega squirt kit come with the sensors I will need?
Also what manifold should I use to build the FI system of of? I have a 1 barrel and a 2 barrel both are cast iron.
What Throttle body should I get? I have read somewhere the 5.0 ford one is a good one to use. Also I woul dlike to stay as much as possible with Mopar stuff so can I use a v8 throttle body or what about a 91 acclaim throttle body, I have one of those, I could also yank all the sensors out of it too is they are usable, or is it a tbi?

Also what is used as the ignition trigger? Is that what the tach hooks up to on the electronic distrib, Hopefully thats what you mean because I have already done that upgrade.

The only sensor the megasquirt kit comes with is MAP. Anything else you'd need to buy... o2, iat, coolant temp, tps...There is detailed info on their site of what sensors you can use and how you can make most sensors work with the system.

Any ignition system can be used to trigger the MS. If you use a stock setup wether points or mopar electronic ignition you'd trigger from coil negative. If using an aftermarket system you'd use the tach output. Using the coil negative as a trigger can lead to some issues with false triggering and so on, but these can be remided with filters. Just my personal opinion, after going through the same mess with trying to use coil negative trigger on stock mopar electronic ignition... I would recomend getting an aftermakret box and use the tach output. It is just one less hassle.

I am not sure about mopar tbi's but I can vouch for there being plenty of GM tbi's in the wrecking yards. You could remove the fuel injectors/regulator pod from the body and just use it as an air gate if you are doing multiport, that way you get a built in tps that works with the MS with no fuss.

ok then a GM TB it is, what years and makes of GM's should I be loking for as being the best donor? I am plannigto run about 10psi of boost by the end.

Also about the adapter plates, is there an advantage to them besides ease of use, or can I just drill and tap three new hole in my existing manifold?

I am not sure how boost will play into all this, I only have experience with n/a engines.

The throttle bodies you want to shoot for are out of late 80's to early 90's anything gm. Lots of 1 barrel single injector bodies out there too, but I assume you want two barrel for additional capacity. I believe the 2 barrel varietes are 5-600ish cfm range. There may be a better coice for throttle bodies to mate with a turbo... either way if I were you I'd build the engine, get it running on a carb, add efi and get that running, then finally the turbo.

It's already running well with a carb, so EFI will likely be the first step.

Ok correct me if I am wrong, but... The single barrel GM Throttle bodies late 80's early 90's use the same 2 bolt pattern on the single barrel slant manifold, and the 2 barrel gm throttle bodies of the same year use the weirdo 3 bolt pattern? After browsing the collection of shop manuals here at the library I work at, It looks like the 93-96 V6 Camaros equipt with Multi Port Fuel injection have a Two Barrel Throttle Body, with IAC and TPS, AND it looks like its the very same 4 bolt pattern as the Super six intake. Can anyone confirm this? Here is a picture of an aftermarket swap in one being sold on ebay, what are your thoughts? This would be used in a multiport/megasquirt system.

http://cgi.ebay.com/ebaymotors/ws/eBayI ... 2427714838

ok i found a guy that gave me the measurments, I don't have my car here with me so I can't compare here are the measurments.

2 3/4" by 4 1/2" center of bolt holes center in a rectangle format, I'll measure mine when I get home tonite and post tomorow if noone else has posted by then.

I don't think any of the 2v throttle bodies have the same bolt pattern as the BBD. The Mopar and Cadillac throttle bodies appear to have the same bolt pattern as the Holley 2300. They also have a 5" air cleaner base so a standard aftermarket air cleaner will bolt on. Neither of these throttle bodies will work with the megasquirt as the IACs are not simple on/off valves. Both of these are used in MPI systems. If you are going with the MPI system, I would suggest a throtle body from the Ford 5.0 or the 4.6 V8s or the 4.0 V6. The SDS web site recommends the 4.0 as a simple, compact system (no built in IAC). I know the '86-'93 5.0 has an IAC that is supposedly compatiable with the megasquirt. I picked one up off of ebay and it is a nice setup, but it has no provisions for ported vacuum.

When I was pursuing a MPI setup, I figured out that the stock 30amp electrical system in my '65 would not support the amperage required for the controller, injectors, the fuel pump and the various sensors. This would require a complete rewire, a new alternator, running new fuel lines, a new fuel tank, and fabricating an intake manifold, this put me off on pursuing this to completion.

After comtemplating all of this, a $20 Holley spreadbore off of ebay looks very promising and would give me, 90% of the flexibility of the MPI EFI.

Well I measured it up and its a no fit, its way too big, about an inch on either side. When you say the sds website what site are you talking about?
this one? http://www.bgsoflex.com/megasquirt.html
As for power requirements, I was planning on running a higer amperage alternator anyway, mostly because mine is gettin pretty ugly corroded. Will the GM Throttle body not interface with the megasquirt? Was it Bob that was planning on coverting to a megasquirt or was it dart270 that was planning on converting to Multiport? Although a spreadbore is nice carb I am really into this more for the time consumption and running a turbo/intercooler setup in the end so I don't think another carb is the way to go for me. Maybe we should start a page for people to post all of there Fuel injection information. Bob, in your Multiport setup are you running turbos, your a running the GM throttle body right, and computer right?

I've been following this thread with great interest. The mega squirt will give me everything I need for my turbo efi / (including cost), BUT, how complicated is it to build and set up this thing???? You guys make it sound like gravy but after reading some of the stuff on their website I'm blown away. Is it as complicated as it sounds??

I guess it is pretty naive to think I could do all this with wrenches and screwdrivers.

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Grip it and rip it

You'll need that plus soldering guns and solder. I am gonna be building one soon as I find the cash, if you buy the parts for me and you i'll put youre together while I am builging mine. then you only have to do the mechanic stuff and set it up on the laptop.

I can do the same. If someone wants me to build a unit for them, they can purchase it and ship it to me to have it put together. I haven't built one yet, but I have about 35 years experience with electronics to throw in, and I plan on building one someday anyway.

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Chuck Rivers, Webmaster

Jedi,
No, I'm not considering going with a MS. I may someday if I run into a wall with something that I'm trying to do with a junkyard ECM. I am running a Buick 3.8L turbo at 8 PSI on my set-up. So far the only "turbo" parts I'm using are the turbo MAF and turbo injectors. The GM NA throttle body works fine with the draw thru turbo.
Bob D
http://hometown.aol.com/bbobbias/myhomepage/photo.html
http://hometown.aol.com/bbobbias/page1.html