Hullo members, has anyone made their Demon V8 valve cages out of Brass instead of drill rod?

Help Support HMEM:

rrocky

Member
Joined
Apr 1, 2016
Messages
22
Reaction score
1
Location
Australia
Has anyone made their valve cages for Demon V8 out of brass instead of drill rod? cheers rrocky
 

bluejets

Well-Known Member
Joined
Apr 22, 2014
Messages
314
Reaction score
106
Brass won't be worth the time it takes to make them.
Bronze on the other hand is recommended.
 

bluejets

Well-Known Member
Joined
Apr 22, 2014
Messages
314
Reaction score
106
Possibly but these also carry the valve guide in which plain brass is way too soft.
Perhaps in Canada, bronze is known as brass.
 

Brian Rupnow

Design Engineer
Project of the Month Winner
Joined
May 23, 2008
Messages
13,018
Reaction score
5,822
Location
Barrie, Ontario, Canada
No, actually we Canadians do happen to know bronze from brass. The advantage of using brass for valve cages is that the brass will deform slightly under pressure from a steel valve during the combustion cycle, and this very slight deforming increases the ability to give a 100% airtight seal between the valve and the valve seat. There is nothing wrong with using bronze, except that being a "harder" metal the bronze will take a longer time to give the same sealing effect. I have built over 20 i.c. engines, all with brass valve cages, and they all perform quite well.
 

bluejets

Well-Known Member
Joined
Apr 22, 2014
Messages
314
Reaction score
106
Good...there still remains the wear ability of brass compared with the bronze on the valve stem.
FYI I have also built many engines over the last 50 odd years.
 
Top