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MFI re-conversion from Webers
The project on my 1969 911E has begun, converting from Webers back to MFI. I have owned the car since 2005, oddly enough I picked it up the Monday after the F1 Indy tire war debacle. Anyway, I sourced all the necessary parts and have had them in some big boxes for about 18 months and a move from Hawaii back to the Mainland.
Started the project this past Saturday. Took the boxes down from the top shelf and laid out all the goods! Some photos of the initial stages follow:   
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Matthew - drove Nurburgring with wipers on and no rain 1969 911E SOLD  2002 996 Cabrio 1995 993 Carrera 4 SOLD 2004 Land Rover Discovery II G4 Edition (Sold )
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04-02-2013, 06:17 PM
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Some shots of the Weber set up before:
   Tear down and build up:      The "dent" in the air filter housing is necessary to clear the A/C condensor. Webers with no where to go...   I had the car taken on a flatbed to the mechanic to change the cams. A PO had changed cams to some without the extension to drive the gear for the MFI pump. Overall, a pretty straight forward process. Would like to have known that some things went on before others due to space constraints but it was nice couple of afternoons. If all goes well, I may make the trek to Wash DC this summer in the 911E. Enjoy!
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Matthew - drove Nurburgring with wipers on and no rain 1969 911E SOLD 2002 996 Cabrio 1995 993 Carrera 4 SOLD 2004 Land Rover Discovery II G4 Edition (Sold )
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04-02-2013, 06:43 PM
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Join Date: Feb 2003
Location: Black Rock, CT
Posts: 4,345
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Ummm, isn't the mechanic going to need to remove all that to put the new cams in??
Also, what about the injectors? Were the heads tapped and capped? Won't you need to swap heads?? (Unless the previous owner left them and just plugged the opening) Also, is your mechanic MFI versed? Can he calibrate the whole system? Finally, was the pump you got one that was on that size engine originally?
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Jake Gulick, Black Rock, CT. '73 yellow 911E , & 2003 BMW M3 Cab. Ex: 84 Mazda RX-7 SCCA racer. did ok with it, set some records, won some races, but it wore out, LOL[/B] |
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04-02-2013, 09:10 PM
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And the gear on the back of the driver's side cam with the cog belt that drives the MFI pump?
Likely you will need to pull the engine to get the MFI all correctly installed, buttoned up and running? Are the throttle bodies in good condition? And what about the MFI pump as mentioned above? Also you may need a different electric fuel pump that feeds the MFI system. It is a special hi pressure unit....likely different than the lower pressure one used for carbs. You'll love the end result tho. Good luck with the project.
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"Are you out of your Vulcan mind?" Doug 2022 Carrera 4S, 1989 Delta Integrale, 1973 911T CIS Last edited by skinnerd; 04-02-2013 at 11:20 PM.. |
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04-02-2013, 11:18 PM
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Heads were capped. Plugs were removed and injectors installed. No need to take all the MFI equipment off since the cam towers are outboard of the heads.
New pump specifically for MFI will be installed as well. Just did not have time to do it myself. Plus, it will be easier for the garage to do it while car is in the air.
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Matthew - drove Nurburgring with wipers on and no rain 1969 911E SOLD 2002 996 Cabrio 1995 993 Carrera 4 SOLD 2004 Land Rover Discovery II G4 Edition (Sold )
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04-03-2013, 06:17 AM
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Correct on dropping the engine. The cam gear will also go on after new E cams are installed / timed.
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Matthew - drove Nurburgring with wipers on and no rain 1969 911E SOLD 2002 996 Cabrio 1995 993 Carrera 4 SOLD 2004 Land Rover Discovery II G4 Edition (Sold )
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04-03-2013, 06:19 AM
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Exotic Vehicles are here
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Sorry for silly question: Is anything wrong with the Webbers to keep them?
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"Y" <- My favorite question... + '68 911 + Helping your business to get more business: http://myWWWapp.com |
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04-03-2013, 11:48 AM
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Webers were the ultimate carb (before PMO improved even over those) but MFI gives superior drivability (cold starts) and a few more ponies (not sure if that will apply to E cams..)
The downside is the MFI weighs a lot more (and worse, is slung out in the rear of the car). You can also pretend you are driving a diesel tractor as that is where Pooschey got the pump... |
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04-03-2013, 11:59 AM
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PS....your coil needs to be centered on that bracket that's holding it.
Shouldn't be holding the coil way out on the end like in your pic.  
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"Are you out of your Vulcan mind?" Doug 2022 Carrera 4S, 1989 Delta Integrale, 1973 911T CIS |
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04-03-2013, 12:54 PM
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3 restos WIP = psycho
Join Date: Feb 2005
Location: North of Exit 17
Posts: 7,665
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Replate that hardware while you're in there!
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- 1965 911 - 1969 911S - 1980 911SC Targa - 1979 930 |
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04-03-2013, 01:55 PM
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Join Date: Dec 2008
Location: San Antonio, Texas
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The coil placement is correct for an A/C car. Otherwise it will hit the condenser.
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1973 911S (since new) RS MFI specs 1991 C2 Turbo |
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04-03-2013, 02:23 PM
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Exotic Vehicles are here
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Quote:
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"Y" <- My favorite question... + '68 911 + Helping your business to get more business: http://myWWWapp.com |
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04-04-2013, 06:49 AM
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AutoBahned
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I'd probably go for MFI - you have to for some vintage race classes.
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04-04-2013, 11:33 AM
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Join Date: Jun 2006
Location: Virginia Beach
Posts: 556
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Be careful with the cold start circuit. I have a 67S with a 71S motor. It has a momentary button or switch for the enrichment circuit for cold starts. The air cleaner shooting fuel down the stacks have burned more than one Porsche severely.
I'm getting ready to go back to MFI on my 72. Sent the pump to Robert at Fairchilds for a freshening. Good luck with your conversion.
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Rusty 71 911E 55 PreA speedster 85 Turbo look Cab 62 Twin Grille Roadster (getting close) |
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04-04-2013, 12:03 PM
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Kermee
Porsche 911 - then
Porsche 911 - now
