The Ford Barn

Talkwrench · 01-16-2018, 07:03 PM

When the guide and valve sit in I take it that it is just spring pressure against the horse shoe clip that holds it 'firm' in place? I was wondering if the horse shoe clip fit is 'loose' would there be any chance of the guide moving, say at high revs?
I have quite a few old clips and they do vary in thickness... Just a thought

40cpe · 01-16-2018, 07:16 PM

The valve spring does hold tension against the horse shoe clip. The only difference I think the thickness of the clip would make is to vary the installed height of the spring a little. A thin clip might let the guide rise up in the bore a little more.

Talkwrench · 01-16-2018, 08:39 PM

I guess the only way for the guide to move would be a loose bore, weak spring or sticky valve...?

Ronnieroadster · 01-17-2018, 02:55 PM

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If your intention is to run high revs it would be best to knurl the outside of the guide to make them tight going into the guide hole. Next use loctite to hold the guide in place when installing them. With the guides modified and the locktite doing the retention the horse show now is only used to set the guide at its install height it no longer is being relied upon to hold the guide in place. Doing it this way I find no guide movement when turning the Flathead well over 6 grand for extended periods.
Ronnieroadster

01-16-2018, 07:16 PM	#2
40cpe Senior Member Join Date: May 2010 Location: Star, MS Posts: 4,024	Re: question; Valve,guide and clip? The valve spring does hold tension against the horse shoe clip. The only difference I think the thickness of the clip would make is to vary the installed height of the spring a little. A thin clip might let the guide rise up in the bore a little more.

01-16-2018, 08:39 PM	#3
Talkwrench Senior Member Join Date: Aug 2012 Location: Perth, Western Australia Posts: 2,687	Re: question; Valve,guide and clip? I guess the only way for the guide to move would be a loose bore, weak spring or sticky valve...? __________________ *"Came too close to dying to stop living now!"*

01-17-2018, 02:55 PM	#4
Ronnieroadster Senior Member Join Date: Dec 2010 Location: East Coast in CT Posts: 1,525	Re: question; Valve,guide and clip? Sponsored Links (Register now to hide all advertisements) If your intention is to run high revs it would be best to knurl the outside of the guide to make them tight going into the guide hole. Next use loctite to hold the guide in place when installing them. With the guides modified and the locktite doing the retention the horse show now is only used to set the guide at its install height it no longer is being relied upon to hold the guide in place. Doing it this way I find no guide movement when turning the Flathead well over 6 grand for extended periods. Ronnieroadster __________________ I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH