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Author Topic: idea for improving oil feed to the cams  (Read 281 times)

petethediesel

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idea for improving oil feed to the cams
« on: August 08, 2020, 10:18:51 am »
 
    Good morning gents,
        I am rebuilding my Nuovo Falcone engine. It started with intending to just change the clutch plates but once the cases were off it was clear that more work was needed. So far:
  Crank regrind including recovered nose for the oil feed, and new big end. New bearings throughout the engine/gearbox. New selector forks. Complete cyl head re build with improved valves/new guides/springs. New standard oil pump. Camshaft re grind/new followers.

  I'm intending to fit a viton oil seal instead of a plain bearing on the crank nose oil feed. My attention is now on the camshaft oil feed. What a dumb system that relief valve fed weir is!! I'm thinking to tap the relief valve piston and fit a 0.3mm carb jet into it, giving a permanent small feed to the weir but still having a full valve operation at 3.8 bar.

  Has anyone done this? and/or any thoughts?

PS: I already have the Moto Pirner modified oil feed and full flow filter system fitted.

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banquo

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Re: idea for improving oil feed to the cams
« Reply #1 on: August 11, 2020, 09:18:57 am »
There's a 'standard' fix for this adding a separate oil delivery pipe, but I don't have full details of it.
I think it originated in Germany, so you might find something on guzzitreff.
Also pretty sure it's covered in Leafman's thread on advrider, but I can't get into that right now to get you a link.
Kater on that thread has definitely done that mod.

cloggy

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Re: idea for improving oil feed to the cams
« Reply #2 on: July 11, 2023, 06:12:17 pm »
 I have the secondary valve feed. It smokes after a while on idle. Apparently they all do... To minimise cam wear I don't set the idle really low. I have it set like a brit single.

banquo

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Re: idea for improving oil feed to the cams
« Reply #3 on: July 11, 2023, 07:24:56 pm »
I have the secondary valve feed. It smokes after a while on idle. Apparently they all do... To minimise cam wear I don't set the idle really low. I have it set like a brit single.

This is the additional feed to the camshaft Cloggy: not to inlet valve
Incidentally, I have the inlet oil feed, and no issues with smoking, but I also have the cylinder head modification using 8mm stems and guides fitted with valve stem oil seals