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 10 Gretl: my liquid phase LPG injected 944 (Read 1498 times)
Engenia
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Gretl: my liquid phase LPG injected 944
Jul 14th, 2010 at 1:59am
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Here's something you probably haven't seen before ...
www.engenia.com.au/images/02FillerOutside.jpg
68 litre LPG tank in the back "seat". That seat was pretty much useless anyway.
The petrol tank has been removed, along with all the associated  lines, fuel pump, fuel rail, vacuum lines & cannister.
www.engenia.com.au/images/15TankInPlace.jpg
The petrol injectors have been replaced with liquid phase LPG injectors. I had a bit of time on my hands, so I polished the cam box lettering  Cheesy
www.engenia.com.au/images/10InjectorsInPlace.jpg
6 months to get the LPG installation certified, but there's still a long way to go before Gretl ventures out of the garage.
  

hooroo
Errol
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A.M.H
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Re: Gretl: my liquid phase LPG injected 944
Reply #1 - Jul 14th, 2010 at 8:23am
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Wow man, i do believe thats a first for me! You must share on how it runs once its all done!
  

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Ender751
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Re: Gretl: my liquid phase LPG injected 944
Reply #2 - Jul 14th, 2010 at 1:44pm
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That's awesome buddy!! congrats and keep us posted.
  

Nick &&Dayton, OH&&nrnissen@gmail.com&&&&87 951&&85 944/2
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3volve
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Re: Gretl: my liquid phase LPG injected 944
Reply #3 - Jul 14th, 2010 at 4:08pm
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It runs?

We demand a video!
  

&&Dan&&1987 Porsche 944 Rest In Peace&&2002 Volvo S60 2.4&&2002 Volvo V70 2.4T
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Re: Gretl: my liquid phase LPG injected 944
Reply #4 - Jul 14th, 2010 at 5:26pm
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I'd put a NOS sticker on the tank and scare hell out of the Drive-in crowd. Grin
  

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Re: Gretl: my liquid phase LPG injected 944
Reply #5 - Jul 14th, 2010 at 6:01pm
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^hahahah
  
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IAN - 944ONLINE
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Re: Gretl: my liquid phase LPG injected 944
Reply #6 - Jul 14th, 2010 at 7:12pm
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I'd love to see you try and park that at the airport !!!
or Time Square !!
  

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Engenia
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Re: Gretl: my liquid phase LPG injected 944
Reply #7 - Jul 14th, 2010 at 9:45pm
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Quote:
I'd love to see you try and park that at the airport !!! or Time Square !!
It lives in Australia mate, but I see your point. It would be amusing, but not worth the shipping costs †Grin
Quote:
It runs? We demand a video!
Not yet. I tried with the standard DME, but the settings are miles off - way too rich. All I got was a few kicks.
The next stage will replace the DME with an Adaptronic ECU, which will allow me to alter the fuel & ignition maps. I'll keep you posted as it progresses. It'll be a while before she runs.
  

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Engenia
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Re: Gretl: my liquid phase LPG injected 944
Reply #8 - Sep 16th, 2017 at 7:15am
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The picture server has changed and I can't modify the post so I'll repeat them here ...

68 litre LPG tank in the back "seat". That seat was pretty much useless anyway.
The petrol tank has been removed, along with all the associated  lines, fuel pump, fuel rail, vacuum lines & cannister.
The petrol injectors have been replaced with liquid phase LPG injectors.
I had a bit of time on my hands, so I polished the cam box lettering

6 months to get the LPG installation certified, but there's still a long way to go before Gretl ventures out of the garage.
............................. Fast Forward Seven Years ....................................
Turns out it's been a VERY long way to go. Actually I shelved it for a good while, but now I've got time again, it's progressing.

ECU is from Adaptronic in Sydney.
Engine speed and position sensors remain OEM
She gets a Cam position sensor, MAP, MAT and TPS sensors and IACV. Added a knock sensor as well, just in case.
The green circuits are LPG tank level to 944 fuel gauge interface, IACV driver and Purge Control, Engine Immobiliser and Remote Locking


All connectors, and most wire colours and sizes are defined, as well as their sources and destinations

Cam Reference Sensor
Injector Loom (December 2015)

  

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Errol
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Engenia
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Re: Gretl: my liquid phase LPG injected 944
Reply #9 - Sep 16th, 2017 at 7:22am
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The immobiliser has remote locking, so I've added that.

Had to add an extra pull point for the lock actuator.

Hatch Release System is made from material from the scrap bin.
If I remember correctly, the donors were a laser printer and the motor bracket from a discarded compressor that a mate threw my way years ago.
The actuator was from ebay - China. I thought I'd make it push instead of pull, just in case the Chinese engineering left a little to be desired. It was less than $10 all up.

State of affairs inside the cockpit - 4 Sep 2017


16 Sep 2017

Mongoose immobiliser and Adaptronic ECU to it's right, where the old DME lived. IACV driver and Purge Controller above the ECU.

Now for the laborious task of wiring it all up ......
  

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Errol
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Dave W
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Re: Gretl: my liquid phase LPG injected 944
Reply #10 - Sep 19th, 2017 at 7:11pm
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I would strap that tank down better.  If you hit something, that heavy tank will probably pop those bolts and squash you with its forward momentum.

It looks supported for gravity, but not for crashing.
  

Dave - black 84 no longer exists. Sad 83 self destructed. All better now. Smiley
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Engenia
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Re: Gretl: my liquid phase LPG injected 944
Reply #11 - Sep 19th, 2017 at 10:32pm
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Thanks for your concern Dave, but it has been installed to AS/NZS1425, tested and certified, so it should be fine. The only way that tank is going anywhere is if the bolts rip straight through the body in 8 places. The side bolts use the original seat belt mount points and the rear ones have 3mm plates on the outside. If it ever moved I'd have far worse things to worry about. In fact I rather think that I would have ceased to exist before that point.
  

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Errol
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