Ferrea Hollow Stem Intake Valves?
Thread Starter
Teching In
Joined: Feb 2009
Posts: 3
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From: Indianapolis
Ferrea Hollow Stem Intake Valves? Is anybody running these valves (Ferrea hollow stem int. valves 2.165") in their LS3/L92 heads? if so what kind of spring pressures are you running with them?
Just curious, I am putting together a set of my ported Stage 3 heads with them and they are going on a high dollar engine build, just talked to my buddy that runs a engine shop in Chicago and he told be he has had a BBC engine brake the head of one of the intakes and also a SBC do the same on a road race engine while using the Ferrea hollow stem valves.
Just curious, I am putting together a set of my ported Stage 3 heads with them and they are going on a high dollar engine build, just talked to my buddy that runs a engine shop in Chicago and he told be he has had a BBC engine brake the head of one of the intakes and also a SBC do the same on a road race engine while using the Ferrea hollow stem valves.
Thread Starter
Teching In
Joined: Feb 2009
Posts: 3
Likes: 0
From: Indianapolis
I have had good luck using the OEM LS3 hollow stems in my street and mild race builds. This set that I am using the Ferrea hollow stem valves in will have more spring psi and nitrous than the normal street set-up.
LS1Tech Sponsor
Joined: Feb 2006
Posts: 1,170
Likes: 1
From: Rockfield Kentucky
We have used the Ferrea hollow stem valves in many Real Street Superchaged engines. The problems that we have seen are loss of valvetrain control. The hammer effect from the valves out of control break valves, retainers, keepers and hydralic roller lifters.
Cam profile, pushrod strength, seat pressure and valve spring rate are all things to consider.
We have broken solid stem valves when the components are not happy.
Don't blame the valve.
Robin
Cam profile, pushrod strength, seat pressure and valve spring rate are all things to consider.
We have broken solid stem valves when the components are not happy.
Don't blame the valve.
Robin
