Reading/Fixing My RR To Valve Stem Contact Patern (FootPrint) [Pics]
07-23-2008, 08:16 PM
#31
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Join Date: May 2008
Location: Sheboygan, WI
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thats about how mine looks with stock 7.2.. I think im just going to use stock 7.2 legnth CC pushrods I have.. its not to bad. well.. maybe..
everything I see and read tells me to put in as centered as I can.. no one really mentions trying to make the sweep small. but I can definatly see that being an advante from a lift and longevity point of view. But. as for the lift thing. my rotating asembly says safe to .600 lift.. and with these rockers and cam I get .600 lift. so I dont want to go over but being slightly under is ok. so I am willin to sacrafise a littele lift for a more centered patern.. as for it being a big sweep.. nothing I can really do about that. I might just use the 6.950's I ordered and be done.. I dono.. lol.
everything I see and read tells me to put in as centered as I can.. no one really mentions trying to make the sweep small. but I can definatly see that being an advante from a lift and longevity point of view. But. as for the lift thing. my rotating asembly says safe to .600 lift.. and with these rockers and cam I get .600 lift. so I dont want to go over but being slightly under is ok. so I am willin to sacrafise a littele lift for a more centered patern.. as for it being a big sweep.. nothing I can really do about that. I might just use the 6.950's I ordered and be done.. I dono.. lol.
Last edited by ENRKyle20; 07-23-2008 at 08:32 PM.
07-24-2008, 10:05 AM
#32
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Join Date: Feb 2003
Location: Mooresville, NC
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07-24-2008, 02:56 PM
#33
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Join Date: Oct 2001
Location: Engineerland
Posts: 1,517
Just keep the sweep pretty small with 1st priority on being small and 2nd priority being getting it centered. Keep the 2nd within reason.
If you really want to learn something... put a dial indicator on the retainer and write down max lift displayed changing the pr length every .025-.05" It will probably be a bit of a shocker if you just assume a 1.6 rocker is a 1.6 rocker. Record your sweep size and position along with this for added benefit.
I've seen 1.6 rockers be closer to 1.75 before. I have a set of bbc rockers on the shelf that are supposed to be 1.7 but will check out nearly every time right at 1.95 All rockers will change ratio based on geometry, the ratio will even change during the sweep
.
I have gone so far as to move studs in the head before. I have even designed and built my own set of shaft rockers before because I wasnt satisfied at all by what was offered for the application.
If you really want to learn something... put a dial indicator on the retainer and write down max lift displayed changing the pr length every .025-.05" It will probably be a bit of a shocker if you just assume a 1.6 rocker is a 1.6 rocker. Record your sweep size and position along with this for added benefit.
I've seen 1.6 rockers be closer to 1.75 before. I have a set of bbc rockers on the shelf that are supposed to be 1.7 but will check out nearly every time right at 1.95 All rockers will change ratio based on geometry, the ratio will even change during the sweep
.I have gone so far as to move studs in the head before. I have even designed and built my own set of shaft rockers before because I wasnt satisfied at all by what was offered for the application.
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