Anyone using Big Chiefs?
03-05-2009, 08:56 AM
#21
Geronimo36
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With your size motor I've seen a lot of guys running the Crane 139651 which is fairly mild. As I stated earlier, I'm running a solid roller cam in my 580" blower motors. I'd have to double check my cam card but I think I'm running the Crane 138641. I adjust the lash once a year and I'm also running .016 lash instead of the .020 lash they call for. They Idle about 950-1000 rpms, never stall even if it's a quick shift.
I'm not sure if those cams will work with your heads but they're cams that have decent ramp speeds without crazy lift.
Frank
Last edited by Panther; 03-05-2009 at 09:06 AM.
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03-05-2009, 11:55 AM
#23
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03-06-2009, 09:01 AM
#24
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03-06-2009, 11:10 AM
#25
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I hear the way to make them last is to change the valve springs every 50 hrs. if your cam is in the .700 lift area. More often if the lift is higher. Much more often. Also the offset rockers have to be inspected regularly. The geometry puts a lot of stress on them. Not worth the trouble to most people.
03-06-2009, 05:26 PM
#26
So how much power do you lose going from a solid roller to a hydraulic roller keeping the same duration at .050 . What's the RPM range of a hydraulic roller?
Last edited by GPM; 03-06-2009 at 08:10 PM.
03-06-2009, 06:41 PM
#27
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[QUOTE=PatriYacht;2815515]I hear the way to make them last is to change the valve springs every 50 hrs. if your cam is in the .700 lift area. More often if the lift is higher. Much more often. Also the offset rockers have to be inspected regularly. The geometry puts a lot of stress on them.
So ya think so ???? mmmmmmmmmmmmm
So ya think so ???? mmmmmmmmmmmmm
03-06-2009, 07:19 PM
#28
Bill,
What kind of set up are you doing with your Chiefs?????
GPM,
Jim Valako told me that the weight of the valve train is heavy and one hydraulic motor that he did started to float the valves at 6000 rpm. which would be right when the large ports start to become the most efficient.
What kind of set up are you doing with your Chiefs?????
GPM,
Jim Valako told me that the weight of the valve train is heavy and one hydraulic motor that he did started to float the valves at 6000 rpm. which would be right when the large ports start to become the most efficient.
