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goomer 
Bronze Level
Joined: 18 Feb 2016
Location: wi
Points: 51
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 Topic: 301 valve springs
Posted: 19 Feb 2018 at 10:10pm |
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Wondering if there is something better than stock valve springs for 301 3000rpm A-pump s200 turbo?
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DrAllis
Orange Level Access
Joined: 12 Sep 2009
Points: 20546
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Posted: 20 Feb 2018 at 7:23am |
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I've never seen a need for anything more under those numbers. Never seen valve float at 3500 RPM with stock springs either.
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injpumpEd
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Joined: 13 Sep 2009
Location: Walnut IL
Points: 4917
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Posted: 20 Feb 2018 at 7:40am |
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The problem we've run in to, is boost pressure will try to open the valves between cycles. For that reason, we've set up to use BBC springs, for a solid lifter cam, and even roller cam springs to try to keep things sealed up. The place I get them from is not far from you Brian, Competition Products.
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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Beirnesy
Orange Level
Joined: 30 Jun 2012
Location: Mid Western Ont
Points: 351
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Posted: 20 Feb 2018 at 6:48pm |
I will be using these springs. They fit perfectly with no alterations and have a closed spring pressure of 100 lbs.
Edited by Beirnesy - 20 Apr 2019 at 9:49pm
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1969 220,1967 190DXT,1968 190DXT, LGT's 710,,716
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injpumpEd
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Joined: 13 Sep 2009
Location: Walnut IL
Points: 4917
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Posted: 21 Feb 2018 at 7:32am |
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I use the BBC retainer, locks, and rotator eliminators to sit on the head to cover the counterbore.
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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Peterson
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Joined: 05 Mar 2011
Location: Westboro, Wi
Points: 862
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Posted: 21 Feb 2018 at 4:38pm |
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My machinist used his BBC spring pocket cutter on my 426 head. Worked perfect. Using comp cams 26120 springs with corresponding retainers and locks. Installed spring pressure is 80 lbs.
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7095-685I at 255hp, 8070-225HP,8050-210Hp,8030 with 155HP,220 with 670T engine with A-pump, 7580, 185 with 140HP, 2-6080's,6070, S4 D17,wd45,CA,st34 agco, S1 D17 with 3500MK2
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Acllss puller
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Joined: 02 Oct 2013
Location: Ny
Points: 181
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Posted: 21 Feb 2018 at 10:23pm |
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I have heavy duty springs left off my twin charger set up ! $50 buys plus shipping , good set didn't float at 100 boost and 4800 rpm! Maybe overkill ! Lol
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Ryan59
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Joined: 30 May 2016
Location: Kansas
Points: 68
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Posted: 20 Jan 2019 at 6:33pm |
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Oh my gosh. Don’t You know stock springs were used for decades and engineers hammered out the correct springs with tree limbs. Think of the wear!!!! 85 pounds of installed height will push the cam through the oil pan. Figure 8x80 equals 640lbs of lard setting on that camshaft. Why I was told on here that the big boys take ink pens apart and use the tiny spring in them for valve springs. These guys scared the life out of me just for thinking about 65lb seat pressure springs. Imagine if I had wrote big block springs.....
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bsallis180
Silver Level
Joined: 29 Jul 2013
Location: Pennsylvania
Points: 209
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Posted: 21 Jan 2019 at 12:44pm |
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That’s pretty interesting. You have any pictures?
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MACK
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Joined: 17 Nov 2009
Points: 7664
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Posted: 10 Feb 2019 at 7:50am |
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What ever you do don't use stock retainers and keepers. MACK
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