Top systems for Fuel Injection upgrqade

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audiokat

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Tried just getting an idea from searches but wasn't getting where I needed to be. I'm having some hard starting with my Weber DGAV's. I'm no mechanic and calling around Nashville TN has been comical. I can't find a single mechanic that will touch a carb here except old school american car techs and they have no interest in working on a BMW

I'm starting to consider a fuel injection upgrade and trying to get some recommendations on the top modern systems out there.
 
audiokat said:
I'm having some hard starting with my Weber DGAV's. I'm no mechanic I'm starting to consider a fuel injection upgrade
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audiokat:

How well does your car run once it does start and gets warmed up? If it runs well, the problem is probably as simple as that the chokes aren't closing. But DGAV carbs are pretty inexpensive, especially compared to a full-on conversion to EFI. If no one can repair your carbs, you could buy a new pair for much less than the cost of buying and installing a fuel injection system. See: https://www.ebay.com/itm/3943903336...6BbBSbf8W68LydMbpZTnmtgXunfsYLBMaAi33EALw_wcB

Megasquirt is kind of a cool product, but it's what I call a "science fair project" - lots of things have to be hand fabricated, lots of tinkering involved, no commercial shop will be familiar with it, etc. If you really want to spend the time and money involved in a fuel injection conversion, and have someone else do the work, then you should stick with something from a later, 6-cyl BMW that the local shops will be familiar with.
 
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audiokat said:
Tried just getting an idea from searches but wasn't getting where I needed to be. I'm having some hard starting with my Weber DGAV's. I'm no mechanic and calling around Nashville TN has been comical. I can't find a single mechanic that will touch a carb here except old school american car techs and they have no interest in working on a BMW

I'm starting to consider a fuel injection upgrade and trying to get some recommendations on the top modern systems out there.
Click to expand...
Have you considered an electric fuel pump and a check valve to keep fuel in the bowls longer and make starting easier? When is the engine hard to start?
 
X2 on Steve's suggestion.

Electric fuel pump to prime carbs

It seems that most of us with 38/38 or 32/36 Webers experience dry carb float bowls if our car sits for a relatively short period of time (>4 days?). I've put up with this for a year or two, but it's annoying and tough on the starter and battery and time to address the problem. I've owned many...
e9coupe.com e9coupe.com
 
Stevehose said:
Have you considered an electric fuel pump and a check valve to keep fuel in the bowls longer and make starting easier? When is the engine hard to start?
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Ah, excellent point. The problem could be as simple as that the gasoline is evaporating out of the carburetors after a few days of non-use, and it takes a lot of cranking before the mechanical fuel pump gets gas back into the carburetors. If this is the issue, then it has nothing to do with the carbs.

After a few days of non-use, will it start readily if you pour a little gas into each carb throat? If so, then it isn't the chokes as I suggested in post #3 and Stevehose's recommendation of adding an electric fuel pump is more pertinent.

Others have just spliced an outboard motor priming bulb ( https://www.ebay.com/itm/194354552795 ) into the underhood fuel line to prime the carbs. But that's sort of a crude solution!
 
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To expand on starting issues, cold starting is totally fine. If I shut the car off for lets say 10 seconds or a minute it restarts no issue. However if I leave the car for 10 minutes or even 2 hrs I have to hold my foot on the throttle to get it to start and even then it takes 3-5 times of it stalling out before it stays started.
 
audiokat said:
To expand on starting issues, cold starting is totally fine. If I shut the car off for lets say 10 seconds or a minute it restarts no issue. However if I leave the car for 10 minutes or even 2 hrs I have to hold my foot on the throttle to get it to start and even then it takes 3-5 times of it stalling out before it stays started.
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OK, that's not the "gasoline evaporating and the carbs have to refill" problem. Could be your chokes, though the engine should still be warm enough to start and run without the chokes after only 10 minutes. I'm a little puzzled, but still feel it will be quicker/cheaper to fix the carbs than to do a complete conversion to EFI. Even if you have to transport the car to get it to a proper specialist.
 
jmackro said:
OK, that's not the "gasoline evaporating and the carbs have to refill" problem. Could be your chokes, though the engine should still be warm enough to start and run without the chokes after only 10 minutes. I'm a little puzzled, but still feel it will be quicker/cheaper to fix the carbs than to do a complete conversion to EFI. Even if you have to transport the car to get it to a proper specialist.
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Yea you're certainly right about the expense just growing frustrated with all "sorry" we can helps. Also a note I started putting ethanol free in and that didnt help.
 
You might try EurWerks in Nashville and see if Chet will work on it.
www.eurwerks.com

Home | EurWerks

Hello, we are EurWerks, a European and Highline Service Repair Facility. We specialize in providing the highest standard of service to European and luxury vehicles such as BMW, Mercedes Benz, Volkswagen, Audi, Jaguar, Porsche, Land Rover, Toyota, Honda, Acura, Infiniti, and other makers.
www.eurwerks.com www.eurwerks.com
 
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