Ductile Iron Rocker/Valve Tip Alignment
#1469827
07/18/13 02:49 PM
07/18/13 02:49 PM
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Joined: Jun 2006
Posts: 5,163
CT
GTX MATT
OP
master
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OP
master
Joined: Jun 2006
Posts: 5,163
CT
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I'm not liking the way my rockers align on my exhaust valves, looking for some opinions.
These are Erson ductile irons. The picture below is the worst one. Intakes all look fine. Stock replacement rocket shafts with Hughes engines studded hold down kit. Should I just run a washer/shim between the exhaust rocker and the hold down? Am I missing something that is causing this issue?
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Ductile Iron Rocker/Valve Tip Alignment
[Re: GTX MATT]
#1469829
07/18/13 02:56 PM
07/18/13 02:56 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I would shim it.. but I would also get rid of the springs and shim everything to center them.. I made up nylon style to shim it all.. I dont like a thin steel shim that vibrates on the shaft and cuts it(sure it might take a few years but it does).... JMO EDIT But it looks like your missing a washer on the one side 
Last edited by MR_P_BODY; 07/18/13 02:58 PM.
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Re: Ductile Iron Rocker/Valve Tip Alignment
[Re: MR_P_BODY]
#1469830
07/18/13 03:13 PM
07/18/13 03:13 PM
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Joined: Jun 2006
Posts: 5,163
CT
GTX MATT
OP
master
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OP
master
Joined: Jun 2006
Posts: 5,163
CT
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Hey Mr P Body
The kit actually only came with washers to go between the springs/rockers, and from what I've seen usually people don't run any washers? Although I suppose the intent of the washers could have been to go between the rocker and hold down. There were no instructions, and this is what I've seen before when people do use washer if I recall correctly. My intake valves line up fine without anything between the hold down/rocker.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Ductile Iron Rocker/Valve Tip Alignment
[Re: GTX MATT]
#1469831
07/18/13 03:31 PM
07/18/13 03:31 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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You could use large washers(3/4") and cut down the OD and get it very close... I try to stay with in .015 for some slop
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Re: Ductile Iron Rocker/Valve Tip Alignment
[Re: Stanton]
#1469833
07/18/13 05:36 PM
07/18/13 05:36 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Personally, I like springs ... then you don't have the hassle of trying to get just the right clearance. I also figure if springs are good enough for virtually every Hemi rocker system, they're good enough for me !!!
Your choice.. a SB pushes on a angle
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Re: Ductile Iron Rocker/Valve Tip Alignment
[Re: GTX MATT]
#1469836
07/18/13 06:36 PM
07/18/13 06:36 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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Once you get the location squared away, you can take off some reciprocating weight by narrowing the tip from both sides to the same width as the stem diameter.
Boffin Emeritus
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Re: Ductile Iron Rocker/Valve Tip Alignment
[Re: VernMotor]
#1469839
07/18/13 09:15 PM
07/18/13 09:15 PM
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Joined: Dec 2004
Posts: 10,554
Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,554
Rittman Ohio
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The Isky springs are too stiff IMHO You can get shims from Mancini Racing and spacers as well.I just took my heads and rockers over to Harland Sharp and they set me up on the spot  Gus 
Last edited by fourgearsavoy; 07/18/13 09:24 PM.
64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
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