Printable Version of Topic

Posted by: martin_UK914 Apr 10 2012, 06:41 AM

Morning!

So have a 1972 2.4 911E einsprizung motor going into a 1970 914-4 2.0L which had fully functioning injection.

All oil tank pipe etc sorted thanks to advice given on here... now just to connect electrics...

Anyone got any diagrams / advice / existing threads....

cheers.

Martin

Posted by: martin_UK914 Apr 10 2012, 06:42 AM

oh... and its a euro engine, so I don't think it has all the speed switch stuff etc...

Posted by: ClayPerrine Apr 10 2012, 07:50 AM

You are going to have to make an adapter wiring harness to work with the MFI on the engine. I can help with a wiring diagram for the adapter.

Do you have all the factory electrical bits such as the CD box?

Posted by: J P Stein Apr 10 2012, 09:37 AM

I did a 2.4L conversion in my pre-Internet days.....1998 IIRC.
2 Haynes manuals one with a 74 914 wiring diagram & one with a 72 911 wiring diagram.......it took a week or 2 to figure it out making lots of squiggles on each.
I'm no electrical whiz but it worked as I squiggled it up....amazed me.

Posted by: 9146986 Apr 10 2012, 08:18 PM

You'll need to have the RPM transducer, and the fuel filter console too. You'll have to wire a momentary contact switch for the cold start enrichment, and make sure you keep a fire extinguisher in the car too

Posted by: GeorgeRud Apr 10 2012, 08:22 PM

auto Atlanta has a nice booklet with electrical connections at the relay board.

Posted by: plays with cars Apr 12 2012, 12:11 AM

Do you have a link? I couldn't find it on their website.

Posted by: 9146986 Apr 12 2012, 07:13 AM

The AA book doesn't cover MFI. You'll also need a hot air source for the thermostat on the injection pump. Someone makes a manual conversion that replaces the thermostat, but I've never got one of those and I'm not sure who sells it.

Posted by: ClayPerrine Apr 13 2012, 11:41 AM

And the only way you can use MFI with a 914 is if you either find a set of the 916 heat exchangers (when the 916 project was cancelled, they sold them as 914-6 spares) or use the manual lever sold by Henry Schmidt at Supertech performance.

Posted by: Series9 Apr 13 2012, 11:46 AM

MFI isn't electrically complicated. Sit down with diagrams from both cars and you'll be able to sort it out.

Posted by: 9146986 Apr 13 2012, 08:58 PM

If you've got 914-6 heat exchangers, you can weld a tube and run a hose to the thermostat on the injection pump. You HAVE to get hot air to the t-stat or the pump will never work right. I've never seen the Supertech set up, but it sounds like a good idea for a car without heaters.

Posted by: shuie Apr 13 2012, 09:44 PM

There is also a relay for the cold start injection contraption in the 911 engine relay panel. I promise you the car will not start easily if the cold start injection is missing or disabled. I removed this panel from my '72 911 when I did my 3.2 swap, but if I were ever to put a 2.4 MFI motor into a car I would definitely want to keep it. You are going to need the external voltage regulator, 3 pin CD box, and all of the little MFI bits either accounted for and in good working order, or properly substituted for with things like the Supertech kit. Adjusting the MFI in a 914 is really going to be tough, too, which is probably why the factory used carbs on the -6. Here's the 2.4 MFI 911 relay panel for reference.

Posted by: ClayPerrine Apr 14 2012, 05:17 AM

Acutally, from experience, it is much easier. You can get to the pump, and you don't have to go through the fan. Just a short, small flathead screwdriver.

And the factory used carbs on the -6 because it was cheaper and they didn't want the 914 out performing their flagship 911.

Posted by: 9146986 Apr 14 2012, 06:13 AM

In the "FWIW Department" some of the 916's had MFI

Posted by: jm993rs Apr 14 2012, 07:07 AM

I will some have the same questions for the conversion of my 914 !!!

Finally I buy too one 911 E '73 engine !!!!!

And I think Sr. ClayPerrine is the leader on these issues

Now I work on the body of rhe car and soon I working with the engine !!!!!

And because I think the best example in the forums are the pics and




Attached image(s)

Posted by: jm993rs Apr 14 2012, 07:17 AM

the pics of my 914 6 gt clone !!!


Attached thumbnail(s)

Posted by: brp986s Apr 14 2012, 09:01 AM

That car is going to be too fast for that tiny island.

Posted by: jm993rs Apr 15 2012, 01:23 PM

yes ||| the island is very little but have a lot of mountains roads near to my house !!!! and one race track !!!!

Posted by: jm993rs Apr 17 2012, 03:39 AM

Our for make the conversion need your viewpoint, pics, ideas .................

Please

Posted by: jm993rs Jun 27 2012, 04:01 AM

Please anybody can give your view point and instructoons because the body work on my car is near of the finish and I need start the work of the mount conversion to a engine 2.4 E on my 914 !!!!

Thank you guys