Questions on 3.0 using 3.2 induction

[Luke M]

Hello fellow Pelicans,

I've done a search but most of the info is not complete or conflicting.
I have a question in regards to using a 3.2 EFI intake system on a 83 3.0 engine.
What's involved as far as parts to use, fitment issues, injector sizes, and any other tech data?
I want to stay away from using the Motronic brain and prefer an aftermarket unit.
With that said which unit would be best to use?
I'd like to hear from people that have done this conv. and what parts they've used in doing so.

Thanks,

Luke

[jpnovak]

Lots of conversions to aftermarket EFI. AEM, Haltech, Motec and Megasquirt are often used.

The 3.2 manifold will easily bolt up to the 3.o. However, your 83 3.0 has small intake ports (34mm IIRC) and the manifold will be ported at 40mm to match the 3.2 heads. This mismatch will cause clearance issues for the injector tips at the edge. You might have to clearance them with a die-grinder paying close attention to the shrapnel that comes off. You don't want chips in your engine.

The fuel lines are not a direct bolt-in as the fuel accumulator/filter apparatus on a CIS car is different than the 3.2 Motronic car.

The stock injectors will work fine as far as size. You would only need to find larger ones if you have significant modifications and lots of HP.

Not sure exactly what information you say is missing from a search. There are several documented conversions.

[cmonref]

This is a partial supplement to what jpnovak wrote about "die grinder" and matching ports. This shows a large port SC head with the 3.2 spacer on top. In the intake is a plug obtained from Lowes (Home Depot too, I presume) that prevents chips from going down the intake. Put a small amount of grease around the top of the plug. I also used a shop vac close to the dremel grinder to suck up the grinding products.

Note the 3.2 spacer matches the diameter of the intake manifold. Your small port SC head will have a smaller diameter intake. In my case, I ground out some of the injector channel to provide injector flow.

Brian

[Luke M]

Thanks for the replies. I found 2 threads but that was it unless I'm not seeing them all?
From those two that I've looked at there wasn't much info at all.

I saw the port mods needed to mate the two. How about other sensors that maybe needed ?
I see there's several different ECU that could be used. Is one better then the other?

If someone has a thread out there on this I'd like to see it.

Thanks,

[timmy2]

Title search revealed a number of threads for you to look at...
Pelican Parts Technical BBS - Search Results

[cmonref]

Other sensors:

Coolant temperature. Difficult on an air cooled engine. Best to use head temp, but can use oil temp if head temp not available.

Throttle position sensor. Need a 3/8" spacer, then an analog TPS will bolt up to the 3.2 throttle body.

Oxygen sensor. One needed to measure air fuel ratio in the exhaust. Can use two -- one in each exhaust. Need to mount a sensor bung in the exhaust tube.

Manifold Air Pressure. Measure manifold pressure.

Intake Air Temp. Somewhere between the cylinder and the ambient air. Typically in the intake stream but where hot soak can be minimized.

Crank position. Sense crank (or flywheel) position.

Distributor or cam position. Determine position of either which provides engine cycle data which is necessary for sequential operation.

Knock sensor is optional. One or two sensors with the accompanying circuitry in the ECU.

Second MAP for real-time barometric updates.

Flex fuel if you decide to do it.

jpnovak gave you a list of possible ECUs. Several of us use Megasquirt. Haltech and Motec are high-end. Not familiar with AEM. Viper is another one.

A lot of the threads are titled after the particular fabrication being done in support of an ECU installation. Not generally ID'd by the actual ECU. Look at threads by Tippy, cmonref, jpnovak, jim2, and others too numerous to mention.

[Tippy]

If you look at my thread, understand I was in a crunch and reading all documentation from MSExtra and MegaManuals from an iPhone 3!!!

Caveat emptor.

[cmonref]

reading all documentation from MSExtra and MegaManuals from an iPhone 3

Wow! I would not wish that on anyone! I spent a LOT of hours in front of the computer screen.

Luke: you will read everything at least 5 times, and still not get it all. That goes for MS, Haltech, Motec, SDS, Viper ....

Brian

[SoyRacer]

If you decide to be adventurous I have a set of TWM 44mm individual throttle bodies with manifolds, injectors, fuel rails and sensors that'd work very well on a 3.0
With the filter housing clicked on it looks like carbs.

[Luke M]

I picked up a complete 3.2 intake and should be here by the end of the week.
I was searching on google (could be my first mistake) and came up with a few posts.
I then searched the Pelican site and found some good info.

My question is this, I have the 3.2 intake now what do I need?
Based on what I've read it looks like some sensors, an ecu (ms3 or equivalent), 3.2 fuel pump (or a bosch 044), some spacers to mate the intake to the SC ports, what else could I be missing?

I plan on using the stock SC dizzy with an MSD (non digital) so what would I need to do there?

Thanks,

[cmonref]

You won't need a new fuel pump -- my 1980 911SC pump works fine.

I have the 3.2 intake now what do I need

Assuming your intake comes with a throttle body, you need to mount a throttle position sensor. A 3/8" spacer is needed as shown.
An ICV. Use the stock Bosch unit that comes with the intake.
Fuel lines.
A fuel pressure regulator.

[cmonref]

[Luke M]

I called Clewett Engineering today about their EFI kit part # 9007-01.
It seams like a plug n play kit to me. Anyone out there using this setup?
pro's and con's to it? Any other kit out there any better ?
It seams like there's a few different ways to get the EFI to work on an earlier engine. I'd like a kit to make things as easy as possible so I don't have to chase parts down.

Thanks for the help so far.