type 1 fuel injection in a bay

[bugmandave]

I did a search but no luck. Any thoughts on putting a later bug fuel injection system on a 71 bus. Could any advantage in power or economy be expected?

[busdaddy]

Yes, and better heat too if you use the FI exhaust, you'll need to rig a return line to the tank and you may have to install the injectors after the engine is in the bus as the FI Bug engine compartment was wider to allow the unit to go in whole.
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Rust NEVER sleeps and stock never goes out of style.

Wanted, 68-73 westy OG plaid curtains, singles OK.

[bugmandave]

are the cylinder tins wider also then? I wouldn't want to cut anything on the bus to make it fit.

[germansupplyscott]

[busdaddy]

I can't say I've ever gone past the "eyeing it up" stage but it's definitely something I'd like to try, the FI tins are wider but the carb tins fit as well, as Scott says it's to make room for a from below install on the production line, use the carb tins and no chopping required, the question is whether anything has to come off for rear entry. The Mexi FI is also intriguing, I just looked harder at L-jet because I've already got all the stuff.
Somebody here claimed to have had an early bus with L-jet, Telford Dorr perhaps?
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Rust NEVER sleeps and stock never goes out of style.

Wanted, 68-73 westy OG plaid curtains, singles OK.

[bugmandave]

would the advantages be worth the trouble? What kind of increase in performance could be expected? I had a 78 bus with the 2.0 FI and really miss the power compared to my 71. I know it would not compare to that but it would be really neat to see it done and made to appear stock. And my carb is a pain in the ass to keep dialed in perfect.

[busdaddy]

[bugmandave]

I put about 3 to 4k miles a year on it going to shows and camping. I'm in Illinois near Chicago so no winter driving. what's the availability of the mexican fi parts?

[BobB10]

I was looking at the cb performance FI kit at one point, but went with a carb instead. Here's an article about the kit in a '71.

http://www.cbperformance.com/Articles.asp?ID=255
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1971 Westfalia Campmobile
Currently being restored by German Supply.

[skills@eurocarsplus]

Go with a mexi beetle set up. I parted a mexi and did a pin out on the harness. Hook up is like 3 wires to the digi ecu. You can run the cb gas tank outlet return fitting.

That should fit in the bus no problem. You may have to pull the fuel rails, but who cares...no worse than dual carbs
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[borninabus]

[telford dorr]

Indeed, I had '75 bug FI on my '71 panel. Worked wonderfully! Had plenty of torque with a cold engine - no carb warmup problems.

I finally took it off because of harness breakage problems which I didn't have time to deal with.

Had to do the following to make it fit:

- made small pockets on either side of the engine in the angled body sheet metal so the injectors had clearance.

- made an angle-iron bracket to suspend the stock bug air cleaner and air flow sensor from the roof of the engine compartment, such that it hung in the proper position.

- mounted the FI fuel pump and filter to the left of the trannie.

- brazed a fuel return tube into the body fuel filler neck tube (good part: you can see the fuel returning to the tank; bad part: spraying fuel in the tube creates more fuel fumes than returning it to the bottom of the tank.

- had no place for temp sensor 2, so ran a wire to the front of the bus and put an adjustable pot to emulate the sensor. Use it as a kind of manual choke. Works well, but hard to explain how to use it to others who may have to drive the bus.

I still have the complete setup and will reinstall it if I can conquer the (non-trivial) harness issues.
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'71 panel - stock

'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones

To steal ideas from one person is plagiarism; to steal from many is research - Steven Wright

In theory, theory works in practice; in practice, it doesn't - William T. Harbaugh

It is impossible for a man to learn what he thinks he already knows - Epictetus

More VW electrical at http://flowcon.us/td/ (available 9am to 9pm PST)

[skills@eurocarsplus]

[El_Güero]

ive done 2 FI mexi beetle conversions on late buses (one being a westy) down here in méxico, this is what experience has shown me so far:

Engine code is ACD, Digifant version is 1.8

Engine has hidraulic lifters, convex pistons, 55 amp alternator, long treaded heads (spark plug treads)

thermostad and flaps where no longer placed in post 93 engines

You need either a vented gas cap or a return line to the tank. Otherwise you will have a vapor lock

there are two basic setups, early digifant ecus up to 98 involved a 3 wire lambda sensor, and a late ones involved a 4 wire sensor, both use the same pin configuration for the ecu except for the lambda sensor.

Earlier (pre 94) engines had generator and trotle body desing is incompatible to use with alternator as the TPS is placed horizontally in these engines and interfeers with the Alternator.

IAC valve hesitation while hot idling is a PITA

G62 temp sensor usually lasts only 12 months or less, due to fatigue of the plastic-metal bonding, even Hella sensors dont cut it, they cost 10 bucks down here

Basic setting for timming is 6°BTC with the G62 disconected



98-2001 series engines had stuck liftersproblems due to undersized lifter bores, this caused engines to have no compresion at cold start up resulting in no start up and needed engine dismanteling and resurfacing lifter bores.

Map sensor is usually the weak point in the ECU,

Don´t know of any acces code or special code to play with any of the ecu parameters, if someone has this info please share.

N80 valve is best to not conect in the bus setup as engines tends to flood i don´t undestand exactly why
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"Sé que en algún lugar sus dedos pelean con un tornillo" (Remembering Carlos Amat)

"Si quiero estar encabronado
hazte a un lado...cabrón!"

[Ian]

[El_Güero]

Sure.

This is what the chips look like inside the ECU

[/img][img]

[/img][img]

If you know any acces code (function 11) to use with a vag com in order to adapt new values or anything please tell, i don´t even know if this is posible with these digifant ecus.

[/img]
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"Sé que en algún lugar sus dedos pelean con un tornillo" (Remembering Carlos Amat)

"Si quiero estar encabronado
hazte a un lado...cabrón!"

[Ian]

Unfortunately, since the chip is not removeable, it will be hard to reprogram. You can unsolder it and then use an EEPROM reader/writer to get deeper into it.
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Love and Good Roads!!
SCANLESS

[bigbore]

Oh crap now you guys got me thing about it and I don't need anymore projects
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where its cold and snowy

[El_Güero]

The best gains i think is are the very cold and hot starts are flawless and the whole sistem once in place is very reliable, also aceleration feels a lot diferent due to the timing being controlled by the Ecu and not by a centrifugal or vacuum advance mechanism.
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"Sé que en algún lugar sus dedos pelean con un tornillo" (Remembering Carlos Amat)

"Si quiero estar encabronado
hazte a un lado...cabrón!"

[borninabus]

maybe you could help me find a Mexican junkyard where I might find a digifant system that is cheap enough.
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'71 - 1600DP, C/W - 32NDIX - o19
Air Cooleds Only

BAY PRIDE