wonkipop
Samba Member
Joined: January 05, 2021
Posts: 30
Location: Australia
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 Posted: Fri Oct 06, 2023 8:09 pm Post subject: Re: 74 412 wagon question Fuel injection vs. carbs |
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| raygreenwood wrote: |
And...bac2 t6 the wierdities of distributors for a second....and switching back to D-jet....then we have the 1.7L 914 cars that showed up with the advance can #917 stamped on the arm....with an adjusting screw to limit/adjust vacuum advance.
This also has shown up on a few of the 412 Two door with manual trans.....and I have no part number for this advance can after all these years. Its a double can...advance and retard....and advance is adjustable.
I have also used it to great effect on an L-jet injected 1.8L. Its usefulness is that if you are running higher than stock idle and/or higher than stock idle timing...just at the fringe of kicking in vacuum advance, it limits the total advance available so that you do not over advance. This was excellent for the higher compression engines.
Ray |
amazing knowledge you have got mate.
its taken me 30 years just to get my head around how the double can really worked on mine without getting into how i could super fine tune it. 
i'm sort of glad i can just keep it running at this point as an archeological curiousity. so many of these cars do not survive in true unmolested technological form.
i bought the car 30+ years ago when i lived for a time in the states and it returned to australia with me. at that time of my life i was just a VW nerdy who had owned beetles and type 3s and my mother had driven a beetle all the time i was a kid. the 914 with the L jet freaked me out everytime i looked in the engine bay and i would just shut the lid and take it to my old german mechanic who did try and explain it all to me back then as my eyes glazed over. he actually loved it as he had never seen the L jet in the flesh in its pre-historic form. smiled with german pride as he tried to fill me in.
these days i have my head around it. its just not complicated at all.
instead i just shut the engine lid on my audi a3 carpark warrior and look the other way trying to forget what i just saw. |
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