ForcedFirebird's m20 dyno thread.

[digger]

Those are some of the highest m20 numbers I have seen. I want to know every detail of this motor! I've never heard of an m20 diesel block before or anyone using 140mm rods in an m20.

MM were using 140.5mm rods 20 years ago. The diesel block is an m21 and it is where the forged 81mm crank comes from that Alpina used in their engines, and where the the high flow oil pumps that are sometimes mentioned come from.

[AliBOSS]

It's not an 85.8mm stroke but a 3.0 crankshaft from an m54 that we balanced and lightened. So we are talking about 89.6mm

The diesel block we used the block only and adapted it to accept the 885 head. We didn't use bigger pistons, because the diesel block wouldn't support more than 84mm of boring from previous experience.

The block is actually longer that's why we used it, also a lot of modifications and grinding has been done to be able to rotate the crank without the rods hitting the cylinder wall.

Also we are using one of the worst pump gas quality wich is the only available.