Oil Pressure on Start Up
Discussion
Hi all.
I've been reading up on the cam oiling issue on start up on the speed six engines, and there doesn't seem to be a completely agreed opinion on the well known common problem of a delay in pressure up top.
Is there a reason we can't simply fit a 12v electric oil pump, plumbed into the head (or possibly any oil gallery) rigged up to a push button in the cabin to push (basically priming the system) before and during starting?
This looks suitable to me, surely 5 seconds of pumping before turning the key would mean the galleries are full of oil, so the first rotation of the cams would let oil out and coat the moving parts almost instantly.
http://www.demon-tweeks.co.uk/motorsport/oil-pumps...
Just thinking out loud really, my early engine does not even have the "drips" cast into the cam cover, but I'm unsure what these are really for, as on a warm engine where they may be dripping there should be oil in the head already, and an engine that has sat for any time will likely have no oil left there. If they are designed to drip oil onto the cam lobes of a running engine- does the oil pump not do this job already?
TC
I've been reading up on the cam oiling issue on start up on the speed six engines, and there doesn't seem to be a completely agreed opinion on the well known common problem of a delay in pressure up top.
Is there a reason we can't simply fit a 12v electric oil pump, plumbed into the head (or possibly any oil gallery) rigged up to a push button in the cabin to push (basically priming the system) before and during starting?
This looks suitable to me, surely 5 seconds of pumping before turning the key would mean the galleries are full of oil, so the first rotation of the cams would let oil out and coat the moving parts almost instantly.
http://www.demon-tweeks.co.uk/motorsport/oil-pumps...
Just thinking out loud really, my early engine does not even have the "drips" cast into the cam cover, but I'm unsure what these are really for, as on a warm engine where they may be dripping there should be oil in the head already, and an engine that has sat for any time will likely have no oil left there. If they are designed to drip oil onto the cam lobes of a running engine- does the oil pump not do this job already?
TC
Thanks for the replies, Matti I read all those threads I could find in the search last night!
As my cam cover is off at the moment, I was considering cranking it over for a couple of seconds (no HT leads plugged in) to see if there is oil there already, although I know that it is when the engine fires that you get full pressure.
I'll forget about the pre-oiling, but who thinks I should replace my early cam cover with a later one with "drips" cast in? (Or I could TIG them on)
As my cam cover is off at the moment, I was considering cranking it over for a couple of seconds (no HT leads plugged in) to see if there is oil there already, although I know that it is when the engine fires that you get full pressure.
I'll forget about the pre-oiling, but who thinks I should replace my early cam cover with a later one with "drips" cast in? (Or I could TIG them on)
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