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Author Topic:   Hollow Stem Valves
Buster
Gearhead

Posts: 1466
From: Hurricane alley
Registered: May 2002

posted 02-01-2004 04:31 PM     Click Here to See the Profile for Buster   Click Here to Email Buster     Edit/Delete Message   Reply w/Quote
In the March addition of Muscle Mustangs & Fast Fords there is an article on the new Ferrea hollow stem valves. Has anyone seen this?

It��s 21% lighter then a standard 2.02�� valve. The only question I would have with it is... would expanding gases in the stem causing the stem it self to expand? Not that I really know that would happen one way or another it��s just a possible concern.

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V8 Thumper
Gearhead

Posts: 4413
From: Phoenix, Arizona
Registered: Dec 2001

posted 02-01-2004 04:43 PM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
It'd be my guess that a lightweight hollow valve wouldn't be suited for an endurance motor (street included). Probably for drag racing only, where they're only getting run for a short while

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1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9"

All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html

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ironbullet
Journeyman

Posts: 39
From: wytheville va usa
Registered: May 2003

posted 02-01-2004 04:48 PM     Click Here to See the Profile for ironbullet   Click Here to Email ironbullet     Edit/Delete Message   Reply w/Quote
they're like bigfoot I keep hearing about em but I never see em !I wish they would give us the straight dope on em on their website !

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Dubz
Gearhead

Posts: 1781
From: Manitoba Canada
Registered: Oct 2002

posted 02-01-2004 05:05 PM     Click Here to See the Profile for Dubz   Click Here to Email Dubz     Edit/Delete Message   Reply w/Quote
The gasses would probably not create internal pressures to expand the stem as much as they would expand if it was solid.

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KULTULZ
Gearhead

Posts: 800
From: Rockville, MD
Registered: Oct 2002

posted 02-02-2004 09:29 AM     Click Here to See the Profile for KULTULZ   Click Here to Email KULTULZ     Edit/Delete Message   Reply w/Quote
Well...The trick to them is this;

FORD introduced this concept on the 427 Medium Riser in the mid-sixties for NASCAR racing mainly. The intakes have a hollow stem and the exhaust have sodium filled stems (to absorb/handle) for extreme exhaust valve temperatures as the exhaust valve is much more susceptible to excess heat absorption.

This concept was carried over to the Tunnel Port and FE CJ engines.

It would only benefit racing or extreme street useage as it also lightens the valvetrain.

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I am looking for information concerning factory performance/aftermarket speed parts (1958/1960) used on the MEL (Mercury-Edsel-Lincoln) (Also Thunderbird 59/60) Engine Series (383-410-430-462) produced from 1958 thru 1968.

Also older FORD Special Service Tools

-MEL Engine Forum-

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