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> 914-6 conversion/ rusturation GT style, EFI is done
Gint
post Sep 30 2023, 11:32 AM
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Beautiful build. I'd keep it. I would think this car could pull as much as $50k without too much trouble, even on BAT.

5 years ago I bought a 2000 Boxster S for $13k - Hard to beat it for the money. They are like modern 914s, but with air conditioning and cruise control. They are really good road trip cars.

QUOTE(mb911 @ Jun 15 2022, 09:39 AM) *
QUOTE(ClayPerrine @ Jun 15 2022, 05:32 AM) *
QUOTE(mb911 @ Jun 13 2022, 05:04 PM) *
My sons talked me into putting center caps today. Thoughts?
The point on the bottom of the crest should point to the valve stem.
Oh jeez that completely slipped my mind. I will fix that.

LOL
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mb911
post Nov 4 2023, 08:14 AM
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Well to continue on with my EFI project but first to fix the foam rust problem. Attached Image
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mepstein
post Nov 4 2023, 10:51 AM
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I hate that foam. I think I'm going to chem dip my 914 chassis and get rid of every bit of it.
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mb911
post Nov 4 2023, 11:29 AM
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QUOTE(mepstein @ Nov 4 2023, 08:51 AM) *

I hate that foam. I think I'm going to chem dip my 914 chassis and get rid of every bit of it.



I would be on the same page but to far down the rabbit hole on this one.
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mb911
post Nov 19 2023, 11:01 AM
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Side tracked again. Wanting to get the EFI plumbing done so I can check if to ensure it’s sealed up before the bitter cold sets in and can’t have the doors open.

Attached Image Attached Image
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GeorgeRud
post Nov 21 2023, 08:28 PM
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My conversion car is now owned by a doctor with several newer 911s, and says the conversion -6 is the most fun of all. I miss it daily but couldn’t just let it sit in the garage unused. All depends how much time you have to enjoy yours.
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mb911
post Nov 22 2023, 07:21 AM
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I really enjoy this car. I absolutely hate carbs and the way the car runs so different with changes in temp and humidity. Fuel injection will be really nice to deal with
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mb911
post Dec 3 2023, 11:35 AM
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EFI wiring is doneAttached Image
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mb911
post Dec 3 2023, 01:54 PM
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Some garage artAttached Image
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mate914
post Dec 9 2023, 08:50 AM
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QUOTE(mb911 @ Dec 3 2023, 12:35 PM) *

EFI wiring is doneAttached Image

@mb911 Ben, I am inspired by your fuel injection using weber carbs. Could you please share the fuel injection parts list and custom fabricated parts. I have a good set of Zenith and want to do something similar.

Thanks, Matt
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mb911
post Dec 9 2023, 11:39 AM
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Matt here is a quick spreadsheet . You do need MFI heads for a similar setup to what I have or drill your heads like thisAttached Image
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mb911
post Dec 9 2023, 11:55 AM
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@jpnovak is whom you source most of the parts from over on pelican and I think here as well
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Superhawk996
post Dec 9 2023, 12:52 PM
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Is there any sort of retention feature to hold the injector into the MFI port adapters?
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mb911
post Dec 9 2023, 03:05 PM
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QUOTE(Superhawk996 @ Dec 9 2023, 10:52 AM) *

Is there any sort of retention feature to hold the injector into the MFI port adapters?



Just the o rings on the injector . Jamie has assured me that will work just fit. They fit in very snug
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jd74914
post Dec 11 2023, 08:22 AM
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That scares me a little. I said that once on a converted bike motor and had an engine fire shorty thereafter. Please keep an eye on them.
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Superhawk996
post Dec 11 2023, 10:15 AM
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QUOTE(jd74914 @ Dec 11 2023, 10:22 AM) *

That scares me a little. I said that once on a converted bike motor and had an engine fire shorty thereafter. Please keep an eye on them.

(IMG:style_emoticons/default/agree.gif) Scares me a lot. Done too many Design Failure Mode Analysis (DFMEA) as my day job.

Although it may be snug now, seals age, shrink, and harden.

Backfire potential can put significant pressure behind them to push them out. Yeah agree that intake vacuum is normally sucking them in. Also agree you shouldn’t get backfire with EFI . . . . But real world is different

Vibration is always a concern - 6000 rpm has a way of doing funky things.

Thermal expansion of the MFI adapters when hot will lessen the snugness as will the seals themselves as they heat up and become more pliable.

I love this EFI concept; gotta be a way to do a positive retention. Maybe off carb manifold or even off valve covers?

Your car is too beautiful to lose it to an engine fire.
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mb911
post Dec 13 2023, 01:47 PM
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QUOTE(Superhawk996 @ Dec 11 2023, 08:15 AM) *

QUOTE(jd74914 @ Dec 11 2023, 10:22 AM) *

That scares me a little. I said that once on a converted bike motor and had an engine fire shorty thereafter. Please keep an eye on them.

(IMG:style_emoticons/default/agree.gif) Scares me a lot. Done too many Design Failure Mode Analysis (DFMEA) as my day job.

Although it may be snug now, seals age, shrink, and harden.

Backfire potential can put significant pressure behind them to push them out. Yeah agree that intake vacuum is normally sucking them in. Also agree you shouldn’t get backfire with EFI . . . . But real world is different

Vibration is always a concern - 6000 rpm has a way of doing funky things.

Thermal expansion of the MFI adapters when hot will lessen the snugness as will the seals themselves as they heat up and become more pliable.

I love this EFI concept; gotta be a way to do a positive retention. Maybe off carb manifold or even off valve covers?

Your car is too beautiful to lose it to an engine fire.



So remember these are long tip BMW injectors that fit snug into the MFI adapters. The injectors are about 3/4” longer than the o ring interface. Also I ran these in the heads all summer while using carbs as a test if you will for exactly as you suggest.


I can look at something to retain them for sure
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mb911
post Jan 1 2024, 01:44 PM
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I added a relay to the system. I felt the fuse block was powering to many things to pull off of the ignition switch even though it was all 3 and 5 amp fuses. I did the best I could to keep that area clean with wiring but lots to fit in a small space. Also got a a cool new toy. Attached Image
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mb911
post Jan 1 2024, 01:45 PM
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Also had some stickers made for my customers.Attached ImageAttached Image
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mb911
post Jan 18 2024, 03:07 PM
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New exhaust very impressed and excited to try it.Attached Image
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