pushrod length opinions
Thread Starter
Launching!
Joined: Dec 2008
Posts: 235
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From: Lebanon TN
pushrod length opinions I made the newb mistake of ordering pushrods without checking them. I went on someones advice that they used stock length with the cam i'm running (cc503) I have been putting it off but i went out this morning and tested. (Method:sharpie on the valve stem, installed and adjusted rocker and rotated through all four strokes twice) I only had time for one. More after work this afternoon. The mark seems to be very close to center on the valve stem, maybe just slightly toward the exhaust side of the head. What worries me is that the contact patch doesn't go all the way across the stem. Just looking for opinions on the pic and also if the method i used sounds correct. Thanks!
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Joined: Apr 2008
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your PR length check method is correct. what I see is the "allignment L to R of the RR may be off. ISKY adjustable guide plates should solve that by allowing you to line up each RR dead nuts on the valve stem tip.
regarding the length...the marks show the 7.200" (stock) as being "slightly" long. 7.150" may be the ticket but a PR check tool would confirm.
regarding the length...the marks show the 7.200" (stock) as being "slightly" long. 7.150" may be the ticket but a PR check tool would confirm.
your PR length check method is correct. what I see is the "allignment L to R of the RR may be off. ISKY adjustable guide plates should solve that by allowing you to line up each RR dead nuts on the valve stem tip.
regarding the length...the marks show the 7.200" (stock) as being "slightly" long. 7.150" may be the ticket but a PR check tool would confirm.
regarding the length...the marks show the 7.200" (stock) as being "slightly" long. 7.150" may be the ticket but a PR check tool would confirm.
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Thread Starter
Launching!
Joined: Dec 2008
Posts: 235
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From: Lebanon TN
no i didn't... I was thinking about that yesterday. Maybe it wasn't pumped up. How do you "make" a lifer solid? I did soaked them before i installed them.
Last edited by ebeard; Jun 26, 2010 at 04:12 PM.
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Correct question.
You have to use a solid lifter, an adjustable pushrod length checker to measure correct pushrod length. If the heads are not milled, with that cam, stock length pushrods-7200" shouldn't be an issue.
You have to use a solid lifter, an adjustable pushrod length checker to measure correct pushrod length. If the heads are not milled, with that cam, stock length pushrods-7200" shouldn't be an issue. Thread Starter
Launching!
Joined: Dec 2008
Posts: 235
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From: Lebanon TN
Yeah i guess it was fine the way it was, but atleast i learned something. Also spent half an hour in the grass tonight trying to find part of the lifter i dropped on the way back in the house lol
TECH Veteran
Joined: Dec 2008
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From: Little Rock, AR
Thread Starter
Launching!
Joined: Dec 2008
Posts: 235
Likes: 0
From: Lebanon TN
TECH Veteran
Joined: Dec 2008
Posts: 4,146
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From: Little Rock, AR
Guideplates used: http://www.summitracing.com/parts/TFS-30400623-8/
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Joined: Apr 2007
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From: Kempner, TX
Circle Track magazine and others as well disagree with the solid lifter approach to finding the correct pushrod length. Well, unless it's a solid lifter cam, of course, and then zero lash is used. With a hydraulic cam all you do is use the stock lifter and even set the preload.
I can post the link to the article if verification is needed.
I wonder who came up with the idea that you have to pull the intake manifold to find the correct pushrod length anyway. Seems that it's one of those things that got started, then was just passed around.
Jake
I can post the link to the article if verification is needed.
I wonder who came up with the idea that you have to pull the intake manifold to find the correct pushrod length anyway. Seems that it's one of those things that got started, then was just passed around.
Jake
Circle Track magazine and others as well disagree with the solid lifter approach to finding the correct pushrod length. Well, unless it's a solid lifter cam, of course, and then zero lash is used. With a hydraulic cam all you do is use the stock lifter and even set the preload.
I can post the link to the article if verification is needed.
I wonder who came up with the idea that you have to pull the intake manifold to find the correct pushrod length anyway. Seems that it's one of those things that got started, then was just passed around.
Jake
I can post the link to the article if verification is needed.
I wonder who came up with the idea that you have to pull the intake manifold to find the correct pushrod length anyway. Seems that it's one of those things that got started, then was just passed around.
Jake
Guideplates used: http://www.summitracing.com/parts/TFS-30400623-8/
