rv8 oil pressure to high

[Sidecarbod]

A 750 cfm on a 3.5 lump!!!

Just my humble but that's WAY over carb'd

[Purple AK]

Originally Posted by Sidecarbod

A 750 cfm on a 3.5 lump!!!

Just my humble but that's WAY over carb'd

Keep Up Vicar! Neils is one of those Chevy things

[robinj66]

Well I'm confused too. (not hard I know)

Why the reference to a 3.5 RV8 in the first post??

[Purple AK]

Originally Posted by robinj66

Well I'm confused too. (not hard I know)

Why the reference to a 3.5 RV8 in the first post??

Thread Hijack plain and simple Robin Steve the OP was (rightly) concerned about high oil pressure in his RV8. Neil50 expressed concerns about his oil pressure. But as he has a Chevy it isn't a worry. Neil also has a 750 holley on his chevy which concerned Pete as he thought we were still talking about RV8's! (I'm now going for a lie down before I get confused)

[Sidecarbod]

Originally Posted by Purple AK

Thread Hijack plain and simple Robin Steve the OP was (rightly) concerned about high oil pressure in his RV8. Neil50 expressed concerns about his oil pressure. But as he has a Chevy it isn't a worry. Neil also has a 750 holley on his chevy which concerned Pete as he thought we were still talking about RV8's! (I'm now going for a lie down before I get confused)

I've just got back off my hol's, that my excuse!

[neil50]

sorry for confusing everyone just got worried about my engine (SBC) and didn't want to start a new thread on basically the same subject.

[TonyD]

Given that the Rover engine is engineered to run on relatively low oil pressure could anyone enlighten me as to the reasoning on having a low pressure but high volume oil supply.

Is it a fuction of bearing areas ( ie wider bearings less pressure per sq inch requires lower oil pressure to keep metal parts away from each other), a desire to improve power (lower parasitic power drain of low pressure pump versus high pressure pump), better engineering tolerances ( less gaps for oil to fill) or was it that the mechanical drive as originally designed wasn't suitable for high pressure pumping.

Intuitively I would think that in an oiling requirement the ideal situation would be high pressure, high volume ie make sure that there's more oil than needed for lubrication and any left sploshing about can aid with cooling internal parts.

So whats the advantages of low pressure high volume versus high pressure normal volume?

Just interested as I have a lump with a crank driven pump that as standard is 65 psi at idle when hot, when revved goes up to 100psi and runs on 5W-30......... which is a bit like sewing machine oil.

Does the relatively modern engine rely on pushing lots of high pressure thin stuff into the bearings rather than lots of low pressure thick stuff?

And if so... Why?

Cheers,

Tony

PS I used to swear by the old green Duckhams 20/50........