[shreddr]

Originally Posted by shreddr

for thos who have not seen the oil pump modification:

http://forums.pelicanparts.com/bmw-r1100s-r1200s-tech-forum/634322-dohc-gs-hp2s-horsepower-8.html#post6407733





I assume it is part # 2 and 3 that are the 1mm thicker items and a 1mm thick "gasket" needs to be fashioned (laser cut) out of aluminum. Ordering the rotors is simple enough, but I am not sure who can make me the laser gasket.

As I looked through the manual to see what this mod entails it is not pretty! Basically every pulley, sprocket and chain on the front of the engine needs to come off to get to the oil pump (1 pulley, 1 belt, 2 cogs, 2 gears, and 1 chain) although I hear 10% more oil flow from the advocates of the mod I wonder whether this is necessary. Does 10% more flow mean cooler oil, and if so would a bigger cooler be a better and easier mod. Or is the greater flow meant to address an oil insufficiency, which seems unlikely. I am wondering if the added flow is more like an insurance policy than a solution for a known problem. It seems like BMW could have easily incorporated this mod in the HP2S as they already perceived the need in the GS. Perhaps because the GS is spending more time at peak torque, whereas the HP2S spends more time at peak power they didn't see the need. I am confused! All I know is that I don't want to pull all that stuff off the front of the motor if the benefit is a "maybe"