MegaSquirt on 2.3 NG???
Former Sponsor
Joined: Jun 2011
Posts: 63
To directly answer your question, the MS should drive the injectors directly if they are high-impedance. If they are low-impedance, you'll need a flyback circuit as outline in the MS manuals.
I'm not an Audi owner, but I do have Megasquirt on my e30. I did a little Googling to see if anyone else had a similar setup, and I see from your threads on other forums that you're trying to get an increase in gas mileage, and to avoid having to replace your AFM?
My honest advice to you is to banish all thoughts of a standalone conversion from your mind. Get a second, more economical car if you wants more mpgs, and get a junkyard or used AFM. You would more than likely end up needing a second, reliable car if you tried converting to Megasquirt anyway. It's worth it, but basically turns your car into a near-endless project unless you're a wizard with electronics and EFI theory (in which case you wouldn't be asking).
Sorry to be negative, but I wouldn't want you ending up frustrated or carless. If you do get a second car and MS and do your LPG conversion, post up about it!
Also, if you are determined to go this route, www.msextra.com has a great support forum and probably some similar Audis.
I'm not an Audi owner, but I do have Megasquirt on my e30. I did a little Googling to see if anyone else had a similar setup, and I see from your threads on other forums that you're trying to get an increase in gas mileage, and to avoid having to replace your AFM?
My honest advice to you is to banish all thoughts of a standalone conversion from your mind. Get a second, more economical car if you wants more mpgs, and get a junkyard or used AFM. You would more than likely end up needing a second, reliable car if you tried converting to Megasquirt anyway. It's worth it, but basically turns your car into a near-endless project unless you're a wizard with electronics and EFI theory (in which case you wouldn't be asking).
Sorry to be negative, but I wouldn't want you ending up frustrated or carless. If you do get a second car and MS and do your LPG conversion, post up about it!
Also, if you are determined to go this route, www.msextra.com has a great support forum and probably some similar Audis.
Thread Starter
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1st Gear
Joined: May 2011
Posts: 6
Thank you for your honest opinion my friend! 
I am determined tho, and as the car is actually not really needed until september2012, for now its just a play thing, well it always will be a play thing lol
Looking forward to the challenge, have all the details pre fitting worked out now, or so i think, finding someone to make me a custom fuel rail is the only set back other than money at the minute!
So i guess its a case of watch this space periodically for what would you call it??
Confessions of a mad man lol
I am determined tho, and as the car is actually not really needed until september2012, for now its just a play thing, well it always will be a play thing lol
Looking forward to the challenge, have all the details pre fitting worked out now, or so i think, finding someone to make me a custom fuel rail is the only set back other than money at the minute!
So i guess its a case of watch this space periodically for what would you call it??
Confessions of a mad man lol
Former Sponsor
Joined: Jun 2011
Posts: 63
In that case, best of luck to you. I would advise going with the newer MS3 processor to get sequential injectin. Batch-fire doesn't really lend itself to fuel economy, at least in my experience. I had trouble getting 75% the efficiency of stock, but I'm not so hardcore about tuning cruise or anything.
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