Hi,

thanks for quick response.

Got the information from ASP: the waterpump pulleys for the 178-185 harmonic dampers from ASP are 100mm (stock size 120,55). Looks too small for my aplication. I probabely go for a custom build pulley (110mm). Not decided yet.

But even with my 166mm crankshaft pulley: a 100mm waterpump is a huge overdrive.
I am wondering how often you 185mm guys are changing waterpumps?

At this stage it makes sense to change to an electric waterpump IMO. Much better efficency and gains a couple of hp`s.

Steven

Berlin Germany