Re: CompCams 911 springs with stock retainers?
[Re: Mebsuta]
#1720812
01/05/15 03:22 AM
01/05/15 03:22 AM
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Joined: Jul 2008
Posts: 259 Khemi, Stygia
Mebsuta
enthusiast
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enthusiast
Joined: Jul 2008
Posts: 259
Khemi, Stygia
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Here they are, to the best of my knowledge, original springs and retainers from 1968 383 4-spd RR. Wowee Kazowee! (the shafts and rockers are from 1990). According to my plastic RCBS calipers, retainer diameter is 1.330 or so, spring OD is 1.490-1.500 or so.
68 Roadrunner. 383 4-spd. Beat up.
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Re: CompCams 911 springs with stock retainers?
[Re: Torq37]
#1720815
01/05/15 09:19 AM
01/05/15 09:19 AM
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Joined: Jan 2003
Posts: 75,282 A gulag near you.
JohnRR
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Quote:
Crane 99839 would be a better choice for stock replacement. Stock diameter and far less seat pressure than 911
That spring wouldn't be a DROP IN either and needs to be installed at something like 1.800 , so he would need retainers , seat cups ... which need the spring seats machine flat and guides turned down or modify the cups ... and shims ... I have these springs in 2 different sets of heads.
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Re: CompCams 911 springs with stock retainers?
[Re: gdonovan]
#1720816
01/05/15 09:26 AM
01/05/15 09:26 AM
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Joined: Jan 2003
Posts: 75,282 A gulag near you.
JohnRR
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I Win
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Quote:
Quote:
I have the original vintage springs and retainers on my 383 RR. I am tempted to go pull a valve cover and look.
Digging through Melling catalogs; they said spring that goes with 383 HP cam is VS-430.
http://www.melling.com/Portals/0/Size%20Charts/Valve%20Spring%20ID%20chart.pdf
Other parts nos. I encountered digging around:
ELGIN or PIONEER PART NUMBER: RV891-X RV981X PERFECT CIRCLE or CLEVITE PART NUMBER: 212-1209 SEALED POWER PART NUMBER: VS675
http://www.engineproparts.com/downloads/valvespringinterchange.pdf
Looking at some of these choices it looks like they have a smaller inner diameter like the factory spring which I suspect is the real issue. The Compcam spring has the largest ID and rattles around like dice in a cup since the ID really isn't keeping it centered.
Gary the ID is what you are really concerned with , correct fitting retainers should almost SNAP into the spring, that is what is going to help keep the spring from walking around.
I did have one of those crane springs noted above break on me after a few hours of run time , they had been assembled on the heads and not ever installed on an engine for about 5 years but finally were put on a running engine . I have heard the same about comp 911's too on breakage so I won't run those anymore either.
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Re: CompCams 911 springs with stock retainers?
[Re: gdonovan]
#1720820
01/05/15 01:27 PM
01/05/15 01:27 PM
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Joined: Jun 2008
Posts: 10,958 Oakdale CT
gdonovan
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My choices order the sealed power springs and wait 2 weeks or order compcams 744 retainers.
I'm leaning towards the SP springs, I don't need all the spring pressure for a stocker style cam.
"I think its got a hemi"
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Re: CompCams 911 springs with stock retainers?
[Re: GTX MATT]
#1720822
01/09/15 07:40 PM
01/09/15 07:40 PM
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Joined: Jun 2008
Posts: 10,958 Oakdale CT
gdonovan
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Springs going back, Sealed Power units on order.
"I think its got a hemi"
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Re: CompCams 911 springs with stock retainers?
[Re: gdonovan]
#1720823
01/17/15 01:52 PM
01/17/15 01:52 PM
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Joined: Jun 2008
Posts: 10,958 Oakdale CT
gdonovan
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Quote:
Springs going back, Sealed Power units on order.
The saga continues... Will update Monday.
Last edited by gdonovan; 01/17/15 02:09 PM.
"I think its got a hemi"
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