Re: Street strip valve spring pressure?
[Re: cudadoug]
#2714724
11/11/19 09:54 AM
11/11/19 09:54 AM
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Joined: Feb 2005
Posts: 4,314 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,314
Prospect, PA
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Going out on a limb, this is a solid roller. Seems a little backwards not starting with the cam lobe profiles and rpm range to pick your springs.
If you are using spring pressure to back into your cam choice, a lot of folks seem to use that type of spring on street cars. I think the comp 943 spring is commonly used.
Last edited by BSB67; 11/11/19 09:56 AM.
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Re: Street strip valve spring pressure?
[Re: cudadoug]
#2714800
11/11/19 01:27 PM
11/11/19 01:27 PM
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Joined: Jul 2004
Posts: 19,317 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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About where I'm at w/a .680.660 Isky solid roller in the mid 9's for several years w/one lifter rebuild and spring swap......
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: Street strip valve spring pressure?
[Re: cudadoug]
#2714837
11/11/19 03:15 PM
11/11/19 03:15 PM
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Joined: Oct 2007
Posts: 4,206 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,206
New York
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Regardless of spring pressure or RPM, high lift beats up the stem-guide contact with thrust at a high angle. There is no way around this (except relocating the entire rocker shaft assembly, and even that does very little), since it's a function of the ratio of the rocker arm's long (valve-side) lever length vs. lift: low numbers are bad.
Boffin Emeritus
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