Well , not trying to cause any trouble here but since we are talking about George Reid
Here is his opinion on cleveland oiling system
He mentioned use of high volume oil pump on few occasions
https://www.cartechbooks.com/techtips/351-cleveland-lubrication/
Specifically:
This problem is corrected when you limit oil flow to cam bearings and lifters and divert more of it to main and rod journals where it is needed most. While you’re at it, you need to increase volume and pressure to some degree with a high-volume oil pump and some adjustment to the pressure relief valve as necessary.
And here
In your Cleveland engine building plan, always use a high-volume oil pump and perform a detailed blueprinting before installation. Check rotor-side clearances and the pressure relief valve for proper operation. If you want more pressure, add shims to increase pressure. However, be very careful about this because you don’t want too much pressure. You want a maximum of 10 psi per 1,000 rpm.
And this supports the theory of not needing restrictors unless turning high rpm
The problem with this approach is oil starvation to main and rod bearing journals at high RPM. Main and rod bearings share oil with the lifter galleys. Traditionally, mains and rods always had an exclusive oil galley. Starvation really isn’t a fair way to put it, however, because high-performance street Clevelands have adequate oil supply to all critical points throughout the engine proving Ford engineers did their job well. However, when you spin a Cleveland to high RPM (above 6,000), oil starvation exists at main and rod journals mostly.
However I would agree that restrictors are cheap and good insurance to keep main and rod journals in good working order. I will be getting them for my engine as well
Cheers
Alex
Hey, no problems Alex. I’m still learning about this and hopefully others will get something out of this too. I’m actually talking about George Pence, but I think they are both very well known in the 351 world.
I had read that the George I’m talking about felt the about the high volume pump, but has changed his mind about it. He says the std volume pump is plenty, because with the high volume pump there is to much cavitation. And ya wow, the George you’re talking about just did that article in 2014, so pretty recently. Hmmmm, very interesting!
I am surprised that there are so many different ways to deal with this oiling issue. I just think something needs to be done, one way or another to help prevent a bearing failure.
Like I said before I don’t have any plans to race my car, it’s a street car, but sure would like it to be bullit proof as possible.
