TOPIC: NHT small bolt pattern heads- valve springs.

NHT small bolt pattern heads- valve springs. 28 Oct 2016 11:37 #1

dynodave
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dynodave
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In the recent past I stripped down a few valve springs out of the half dozen heads I have, and out of 3 so far NONE have the soft-large diameter spring packs.These soft springs are all that should be needed for the mellow cams on the early engines. BUT on none yet have I found any soft springs, and all show evidence of being previously worked on....some showing BAD work.
details to follow

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Dave Comeau
atlanticgreen.com/contact.htm

NHT small bolt pattern heads- valve springs. 11 Nov 2016 16:13 #2

dynodave
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dynodave
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Here's the link if you want to look at the NHT heads:
atlanticgreen.com/nhth.htm
Communication With Les Emery @ Norvil revealed that the stiff/late springs came in in 1960 with the picket fence heads.
I wasn't going to argue, but I saw no particular need for stiff springs except for a new more radical cam called the SS for 88SS/99SS/650SS which became the stock atlas/commando cam.

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Dave Comeau
atlanticgreen.com/contact.htm

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NHT small bolt pattern heads- valve springs.