L Jetronic

li_gangyi · Posted: Sat Mar 07, 2009 6:35 pm Post subject: L Jetronic

Gonna get this setup from a guy on the classifieds. I have a carburetted beetle and would like to switch to FI.

Any one has good pictures to show where the hoses and all are routed? I'm kinda interested also in how the Cylinder Head Temp sensor is mounted. I think I can figure out the fuel return somehow.
_________________
Me messing with the transmission and stuff...(includes pictures and the whole 'story')

http://vwbeetleadventure.blogspot.com/

zoti · Posted: Sun Mar 08, 2009 12:33 am Post subject:

What engine is it going on? Was the car FI before?

The L-Jetronic head (driver side) has a place for the temp sensor. You will need to make one if it's a regular 1600 head.
The FI heads have smaller vlaves.
You will need a fuel pump capable of delivering the PSI needed for the injectors. You will need the computer and double relay to get everything working safely.

If you ask me, your asking for trouble. If the engine is a regular 1600 engine it is going to be complicated. Better get a third party FI system or get one from Mexico.

Bruce · Posted: Sun Mar 08, 2009 12:46 am Post subject:

IMO, I think it is a bad idea to upgrade to 35 year old obsolete FI. Better would be to get a complete system from a late model Mexican Beetle. With that, it is digital instead of analog, and has O2 sensor feedback.
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li_gangyi · Posted: Sun Mar 08, 2009 7:10 am Post subject:

Thanks for the replys and input guys.

I'm gonna get it megasquirted in the future, at the moment for testing I'll hook it all up as per stock. I understand the lack of an O2 sensor (permanent open loop).

I have it carbed at the moment, I don't believe the head has the boss for the CHT sensor, I'm guessing I'll have to weld a suitable nut or thread a hole to the heads to get this done.

I think some people with MS get by with the CHT sensor mounted on the rocker arm covers.

Will be getting the computer, not too sure if I'll get the double relay.

I've basically snagged parts from this guy for the intake manifolds and all, they're cheaper than the mexican setup (I'm cheap), pretty sure it'll beat the H30/31 I have currently.

I'd have to somehow hook up a real TPS to the throttle later on for MS though... that's another thread I suppose.
_________________
Me messing with the transmission and stuff...(includes pictures and the whole 'story')

http://vwbeetleadventure.blogspot.com/


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