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  #76 (permalink)  
Old 05-11-2012, 01:47 AM
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Quote:
Originally Posted by zildjian4life218
howards - 180325-08... even with the cam NOT having a reduced base circle will I have this issue? and thanks for the links. I will read through them.
The base circle will be whatever diameter that is needed to get the advertised valve lift. That means the base circle diameter can be less than a stock cam, even though the cam's not advertised as a "reduced base circle" cam.

The limit is 0.354" lobe lift, which is 0.531" valve lift using 1.5 rockers. You are right at this limit, so check VERY carefully, or use taller lifters made for more lift than the stock pieces.

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Old 05-11-2012, 08:06 AM
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Thanks for the replies everyone.

Ap so all I need with those are the special .050" keepers and a set of retainers?

Cobalt when I installed the lifters I didn't notice any of them going down any further than the lifter ties. Should I be alright cause of that?

Last edited by zildjian4life218; 05-11-2012 at 08:26 AM.
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  #78 (permalink)  
Old 05-11-2012, 08:40 AM
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What does everyone think of these? Will they work with the springs AP suggested? I am probably gonna go with 10* degree locks just cause im replacing everything anyways and the prices are the same. Im thinking about these retainers

http://www.summitracing.com/parts/HRS-97132/

and these locks...
http://www.summitracing.com/parts/HRS-93085/

It says .050" installed height.
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Old 05-11-2012, 09:27 AM
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Your different retainers will change the installed height, it never stacks up the same, btdt. I installed those springs on an lt1 and the guy was pleased with them so far. I'm not sure where the .530" lift comes from on the cam measurements but I've heard it before. Again, nothing stacks the same from engine to engine so just check yours.
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Old 05-11-2012, 05:06 PM
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Quote:
Originally Posted by zildjian4life218
Cobalt when I installed the lifters I didn't notice any of them going down any further than the lifter ties. Should I be alright cause of that?
I wish I could say w/certainty exactly how much engagement of the lifter to the dogbone is the bare minimum required for safe operation- but I can't.

My best advice to you is if you are going to err, err on the safe side. See if you can find a minimum amount of engagement cited elsewhere instead of going by lobe lift- there are too many variables for that to be really effective IMO.

Quote:
Originally Posted by ap72
I'm not sure where the .530" lift comes from...
From Crane's Director of Valvetrain R&D, Mark Campbell.
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  #81 (permalink)  
Old 06-07-2012, 09:03 AM
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Sorry I keep digging this up but I am finally gonna order the springs/retainers/locks.

Just got around to dropping the heads off at the machinists to get looked over. Will the locks and retainers work that I posted before?

I noticed the retainers say 1.250" outer spring and I think the ones AP suggested are 1.265". Does this little distance not matter? Would anyone suggest a different set?
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Old 06-07-2012, 09:09 AM
How fast is fast enough?
 
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call competition products.
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Old 06-07-2012, 10:06 AM
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Alright Ill do that in a bit on my lunch break. Summit has those three part numbers all listed as suggested parts for each other so im assuming they should work together.
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