924Board.org

morghen · Joined: 21 Jan 2005 Posts: 8883 Location: Romania

Yes, just another teaser

Got a scanner as well now, so things should move way faster than with the supercharger kit.

Yes, i'm working on a new kit, to complement/suplement the supercharger kit.
But like i said, you will be able to use this new product even if you dont want to supercharge your 924.
Hints in the pictures

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https://www.the924.com

morghen · Joined: 21 Jan 2005 Posts: 8883 Location: Romania

I'm working on a set of parts that will allow us to convert the 924 to EFI, but keep all the CIS components in place and partially re-use them.

The idea is absolute bolt on, plug in, start and drive.
So no wires to solder, no wires to split into.
ECU comes pre-mapped.
All the sensors and other EFI specific components will be bolt on to the old system and will stay as hidden as possible.

The "cherry on top" is the fact that this system wont use a conventional fuel rail.
Rather a replica of the original fuel distributor block acting as a fuel rail (block).

I plan to re-use the old fuel injector lines as well. We must find some solution to recover those as most look cracked and old by now.

My idea is: you open the bonnet, you spend 2-3h bolting on parts and connecting electrical connectors, you close the bonnet and you start driving.
Keep all work under the bonnet and installation time around 2-3h.
End result is the engine bay looks identical to the original but runs a modern system.

This should bump the power and torque up, improve reliability and driveability..no hot/cold start issues...smoother engine, more power.
I'll do the tuning on the dyno.

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https://www.the924.com

Mike9311 · Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish

Morghen, this is sweet! This may be the ticket for this build. The one that started the 924 journey

https://www.924board.org/viewtopic.php?t=33237&postdays=0&postorder=asc&start=0

I have been going back and forth over how to get it running. Even built a MS unit a long time ago but never went through with it so the car sits. Nostalgia has me holding off such a change. Thought maybe going back to CIS completely or even FrankenCIS as time has rolled along. I like your thinking here
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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car

Mclaren924 · Joined: 13 Oct 2021 Posts: 171 Location: California

Wow this is very cool Morghen! Any timeline on when this will be finished? Along with how will the ecu be setup? Will it just be a stand alone that you have pre mapped and can be tuned and have inputs/sensors added. Very interested in this setup for my 77 along with that supercharger I whimped out on... Very awesome that you're making a bigger aftermarket for these cars! Cheers
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1980 931 "Salt" Bucket wannabe racer (not started)
1979 924 "Pepper" Restoration (almost done)
1980 924 "Donnie" (Parts car)-DEAD
1977 924 Slicktop "Pennie" Bucket turned Silver Spoon

Fifty50Plus · Posted: Mon May 01, 2023 11:04 am Post subject:

I'm greatly interested to see if this can be adapted to my race car fueling. I've done away with the WUR and have an adjustable fuel pressure regulator. To fine tune the CO reading for max HP (around 12.8 CO) I have a few resistance mods in the ECU that drive the frequency valve. It's a plumbing nightmare but works.
Will your system read the output of a Wideband sensor and make changes in real time based on engine demand for fuel and target CO? If so I'm in. Anything to get rid of the frequency valve.....it does work but like I said, a plumbing and wiring nightmare.
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1979 924 NA race car
1982 924 NA race car - Sold
1982 924 Turbo almost a PoS
1981 924 Turbo a real PoS, new engine
1982 924 Turbo nice body, blown engine
1972 911 E race car - going to Vintage
Various 944s to become IT-S race car

kondzi · Joined: 02 Jul 2018 Posts: 485 Location: Poland/EU

Cool. Fingers crossed. I expect this will be a simple design, pre-mapped for stock 924 with little or no AFR corrections. Otherwise the ECU price would kill the affordability.
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Konrad
'89 951 US
'88 Mustang 5.0 LX Convertible (factory specs)
'84 911 Carrera 3.2 RoW (factory specs)
'81 931 RoW (TBD)
'81 Ford Capri 2.8i (factory specs)
'79 Ford Capri 2.9 (heavily modded)

agfisher · Joined: 09 May 2007 Posts: 478 Location: West Hartford, CT

This sounds great!
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1977 924 N/A Martini Edition

morghen · Joined: 21 Jan 2005 Posts: 8883 Location: Romania

Thanks guys!

Mike, i remember seeing that build and being amazed about those machined parts. How long ago was this again?

I would like to finish the built parts design within the next couple of weeks and have the first functional parts within the next month.
In paralel, i'd like to order the bought and off the shelf parts.
So...i'm aiming to have a set within a month from now.
This is a bit ambitious and my 924 is still at the body shop.
But i have my buddie's 924 to work on and develop on.

Ideally by mid summer i'd have a stable system and worked out the bugs so that i can build some kits for others. But lets see how things turn out.

Yes, the system will be fairly simple but modern. I dont plan any overkill.

The system will be able to take wideband input and make closed loop corrections but i dont plan to ship that with the kit. I'll ship with some pre-tuned maps and if you want, you can add the wideband yourself and/or mess with the maps as you wish.

Did some more work on the fuel block today and printed it out to test fit the fuel pressure regulator.
This part is a bit of a challenge to make machine-able while fulfilling the functions it needs to, keeping the looks and the one piece design...and obviously keeping the cost down.

Modern fuel injectors adaptors to fit the 924head and the original CIS fuel lines overlayed on a 3d scan of the 924 head.

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https://www.the924.com

jacobroufa · Joined: 18 Nov 2016 Posts: 531 Location: Belvidere, IL

Wow!

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1980 Porsche 931
1981 Porsche 924 Weissach

safe · Joined: 18 Mar 2017 Posts: 588 Location: Sweden

without a fuel rail how will you secure the injectors in the head?
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/Magnus, Stockholm Sweden
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Porsche 924 -79 NA, EFI and Turbo.
Porsche 931 -79
Porsche 911 -77, 3.2 Targa
Porsche 911 -69, 3.6, Coupe

morghen · Joined: 21 Jan 2005 Posts: 8883 Location: Romania

safe · Joined: 18 Mar 2017 Posts: 588 Location: Sweden

!tom · Posted: Thu May 04, 2023 2:27 am Post subject:

Ingenious
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78 924 NA
5-lug

Eturbo924 · Joined: 09 Nov 2002 Posts: 2212 Location: Londonderry NH

The current injectors are held in place two ways... one the O-ring is a press fit into the head and two... the hard section of the fuel lines is clamped on... thus holding the injectors in place. If that system could be reused then it might not be as obvious to casual onlookers that something is changed. Though wires going to the injectors might give it away

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1982 924
1992 968
2003 C4S
Parts Parts Parts and More parts.
E-mail me for parts you need!
Drive Fast!

Beartooth · Joined: 05 Apr 2022 Posts: 206 Location: Roberts, MT

This is a really elegant way to implement EFI - great idea, and I hope it works out to a great product! One suggestion, if I may: did you consider modifying the existing fuel distributor rather than building a new piece? It'd be one less piece, and more of a nod to looking like it's original. Maybe there's even a way incorporate the fuel pressure regulator without getting crazy. Just a thought; I'm interested to see how this turns out!
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1980 931 diamond in the rough