Power vs reliability
#71
Platinum Member
Platinum Member
My buddy has had 1075s and the new motors without the pop off valve the oil pump is driven like a bit@ch so it has oil pressure at idle.
#72
Registered
Box cleaned (a little). Are you referring to a low pressure shut-off? I'm not familiar with Mercury's design/ engineering. And are you talking wet or dry sump pump?
#73
Platinum Member
Platinum Member
His stuff is nice just did some valve covers for spring oilers nice job and good price. The only thing with my piston oilers they have a direct shot to the piston nothing in the way counter weight or rod.
#74
Registered
#75
Platinum Member
Platinum Member
Mercury puts a spring loaded ball in-between the squirted and the main so the first X-amount of psi goes to the bearings. Import engines do the same. The ones I did also do the same but I get full flow ones they have enough pressure.
#77
Registered
So basically with a 1075 if you eliminate the low pressure by-pass you don't have enough pump at idle to make pressure without increasing pump speed.
#79
Registered
Platinum Member
I have the dart piston oiler option on my motors, also run spring oilers. I run a titan wet sump pump. 40 lbs at idle 80 lbs at wot. No problems at all.
#80
Platinum Member
Platinum Member
The jets are supplied with .026" holes however can be drilled to .040". Most begin with the .026" jets and after the 1st rebuild; begin going up on the hole size. There is a slight pressure loss/flow increase; but the benefits outweigh the detriments.
found this on speedtalk.
Yes a 1075 would make the smart craft un happy with out the spring ball.
found this on speedtalk.
Yes a 1075 would make the smart craft un happy with out the spring ball.