36inter wrote:10 out of 10 for effort and commitmant apbellamy, I like the idea of the oil fed thrusts, can you elaborate a little more on that, I presume the pipework at the bottom of the bores is for cooling the underside of the pistons, is there one per bore?
Does the electric pump replaces the mechanical one completely, if so you must have some sort of electrical controlling wizardry to run it?
Some good ideas I've not seen before.
Keep posting.
Thanks.
Oil fed thrusts:
Basically, 4 counter sunk screws (not shown) to hold the thrusts to the main cap/block and a hole directly into the oil supply for the main bearing. It allows a thin film of oil between the thrust bearing and the thrust face, to help stop the heavy pre-verto presure plates ruining the thrust bearing/face.
Under crown oil jets:
These are from some BMW or other. It's basically an M8 banjo bolt wiht a drilling through to the oil gallery, one per piston. They have a 3 bar ball/spring valve in them, so around 45 psi of oil pressure (medium rev's if all is well) they squirt a cooling oil onto the underside of the piston crown. Hopefully this will help prevent detonation.
Re-circ pump.
This is an auxilary pump as well as the mechanical pump. It will circulate the coolant between a thermostat sandwich plate and the heater return in the bottom hose (no heater). It will run on a timed realy, so it runs for 10minutes after the ignition is off. With the rad fan on a constant circuit, this should help prevent heat soak after shutdown (forced induction engines get very very hot).
I'm trying to make the engine/box as bullet proof as possible as I don't want to be pulling it back out on a regular basis.
Carl at Force Racing
http://www.force-racing.co.uk/ has done most of the machining for me, allthough I'm trying to learn more as a go. I'm going to wobble up the brass dry deck plugs myself on my old lathe, how hard can it be...
I also have a set of his rather nice wheels sat waiting for it.
I also co-own a turbo charged metro van, so have learnt a lot from that. That run's around 150BHP and 170lpft, so doesn't hang round. Currently taking a small break from the mini to complete some upgrades on that, try for a little more power.
A closed mouth gathers no foot.
