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dgerth 
Bronze Level
Joined: 27 Nov 2012
Location: NC Wash
Points: 172
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 Topic: Head Bolts
Posted: 15 Dec 2021 at 8:55am |
Building a new engine. Getting close to head bolt time and was wondering, I have a set of ARP's but they will be too short now. Anyone know of alternatives for longer bolts other than ARP ($$$$$) studs? Or should I quit being cheapo and bite it!! dg
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bsallis180
Silver Level
Joined: 29 Jul 2013
Location: Pennsylvania
Points: 207
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Posted: 15 Dec 2021 at 10:48am |
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What motor? what fuel? how is it aspirated?
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dgerth
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Joined: 27 Nov 2012
Location: NC Wash
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Posted: 15 Dec 2021 at 2:15pm |
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Carburetor, 149 cid, 13.1 to 1 CR, 112 race fuel (VP)
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bsallis180
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Location: Pennsylvania
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Posted: 15 Dec 2021 at 2:55pm |
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I would imagine OEM be fine. If you want bolts I use CAT grade 8 bolts on high Hp turbo diesel like greater then 800hp. The flat surface area would be more important then a aftermarket stud/bolt in your application my opinion
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DMiller
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Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 29428
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Posted: 15 Dec 2021 at 4:32pm |
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You need to go to Studs and Nuts, Forget Bolts. Went thru stuff like this on IH Pullers in the 80s
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DrAllis
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Joined: 12 Sep 2009
Points: 19473
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Posted: 15 Dec 2021 at 7:16pm |
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I've built probably two dozen Allis G-226 and W-226's in the last 40 years and never used anything but a good grade 8 bolt and a hard flat washer under the head. All were carburated and no turbo's. All were over 10 to 1 compression and the 400 inch ones at 13 to 1. Never have had any troubles, so you'll never convince me to use studs and nuts which are so hard to clean up around when you do work on the engine. The later D-17 engines were always grade 8 from the factory, but most people don't know that.
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PaulB
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Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 4401
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Posted: 16 Dec 2021 at 3:32pm |
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I feel NEW grade 8 bolts with hardened flat washers will be just fine. That what I've used on all the small Hi-Performance AC engines I've ever built. Even the one in the D10 with the turbocharger. If you want to go for studs, go for it. Either way don't use used bolts/studs.
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If it was fun to pull in LOW gear, I could have a John Deere.
If you can't make it GO... make it SHINY
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NEVER green
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Joined: 28 Feb 2013
Location: MN.
Points: 6465
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Posted: 18 Dec 2021 at 9:10am |
Go to pulloff dot com, there is a discussion there and are several companies listed supposedly reasonably priced.
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2-8050 1-7080 6080 D-19 modelE & A 7040 R50
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