D-jet to L-jet Help!!

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bmwe91974

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Hi I would just hear if it is possible to change the D-Jet to L-Jet I have a D-jet system in my e9 right now with a 3.5 liter block, and I have a BMW 735i from 82 which has L - jet system, I have heard that L-jet would be much better. That is my question is if I will confine myself to only switch the injection system and not the entire engine. The second is the ignition on my D-Jet is the old bosch wash, where the 735 is the integrated ignition system, it would be feasible to keep the old ignition system from Bosch.?
The reason that I have not resolved to change the engine, is that the block which pages have only traveled 138,000 kilometers, where the 735 has run 286,000:-?
 
Yes, the D-jet to L-jet is a relatively straight forward retrofit. The L-jets do run better with easier tuning and offer better exhaust emissions. The 82 L-jet FI unit is a second generation system from Bosch, in which an 02 sensor has been added. With this added feature,which constantly regulates the fuel mixture, the system does not run as rich as the original L-jets from the 77-79 cars. You'll need to add an 02 sensor bung to your exhaust system.

The original ignition system can be retain. Suggest you add the Pertronix electronic ignition module. This system just mounts inside the original distributor and take about half an hour tops to install. Works great and looks absolutely stock since the whole system is concealed.
 
ok thanks I've already bought a very electric ignition, which I will put in (if i cant?:? about 02 sensors where she should I drill two holes, or can I use the exhaust pipe from my 735er?
 
bmwe91974 said:
ok thanks I've already bought a very electric ignition, which I will put in (if i cant?:? about 02 sensors where she should I drill two holes, or can I use the exhaust pipe from my 735er?
Click to expand...

Only one sensor is needed. Suggest you install it way upstream on the exhaust system, such as near the intermediate muffler mounting flange that connects to the exhaust manifolds/headers. If space allows, mount the sensor upright, so it will be 'concealed' against damage by road debris.
 
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