Right got hold of an ERL race pump which I`ll be stripping and recondtioning hopefully. Decided to got water injection only, although I now have the problem of going pre or post G-charger, would thrmal shock to the casings or bearings be an issue? Think it`s magnesium casings?

Just digging this one back up :smile:

I`ve been running 10psi with my 350cc fuel injectors at 100%dc using a 0.8mm water jet on an earl race pump and it behaved fine, no knocking and 45c MAT with no intercooler.

Upgraded the S/Charger pulley and I`m now at 1 bar boost, running 500cc injectors at 80%DC, MAT`s over 50c so I`m going to try a bigger jet(s) first, if that doesn`t bring the MAT down enough I`ll be into intercooler teritory.

Just off to dig out the flow vs jet size graph on here..