motronic 1.3 upgrade

[eta]

I have a 525e UK spec which has it engine out at the moment and is getting a 731 cylinder head, 2.5 manifold and injectors, motronic 1.1/1.3 wiring harness and the 173 ecu. Plus all the other M20B25 bits like AFM, idle control valve.....

Now I found the motronic 1.3 upgrade thread and it had a lovely diagram on it showing the C101 connector for post 1986 325e i.e motronic 1.1/1.3 and pre 1985 325e using the rectangular connector. This rectangular connector will be the same as I have in a 1986 525e which was the 528e over where you lot are, right? Therfore I using this just match the wires up and it will work with the right chip in the ECU of course?

thanks for reading.

[E30_fiend]

If you are going ahead with the hybrid 2.7i then you don't need the 1.3 upgrade. Just use the i ecu and that's as upgraded as you're going to get. And why don't you use the 885 casting head rather than the 731? The 885 i head is far superior in more ways than one.







Taylor

[mikegar]

ive read somewhere that the 885 heads ports are too large for a n/a m20 motor. and on the non super eta block the 885 would lower the compression a good deal. where as the 731 head has smaller port with less turblence, and would be a better match for non super eta pistons. but on the other hand the the 731 head does run off of l jetronic with the distributor not on the head.

[E30 Wagen]

May I ask what camshaft you are running? I'm hoping to build the same exact engine for my future e30.

[eta]

The camshaft that coes with the 731 heas which as 264 degree duration ans 6.8 mm lift I believe.

A 731 head matches the pistons in my eta I also have two of them therefore I have a spare.