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11-08-2016, 09:51 PM #166Screaming And Flying!
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Stiff block
Stiff head
O ring seal
Good to go for manufacturing
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11-08-2016, 10:09 PM #167Wriggleys gum makes me think of boating, "Double your engines, Double your fun"
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Capt.Insane-o thanked for this postCapt.Insane-o liked this post
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11-08-2016, 10:17 PM #168
Each 3/8 160-ksi bolt has clamp load of like 7000 lbs x 4 bolts/studs =28000 lbs with only one cylinder firing at a time, 12 Sq-in piston top area x cyl combution pressure which depends on level of perf i have heard around 1200psi mod performance? =15000 lbs so it works on paper but the bolts are getting spread out on the bigger bore. All abunch of BS but its interesting lol. Dave
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11-08-2016, 10:25 PM #169
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NICE PAIR liked this post
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11-08-2016, 11:31 PM #170Junior Member
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these blocks are prof of concept for the 3.5L, if they need six, there is plenty of room to add 2 per cylinder, probably 4 per cylinder if you are running POP in your methanol...lmao.. they can easily be upgraded to 200,000ksi ARP studs and 7/16" 20tpi...
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baja200merk liked this post
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11-09-2016, 08:07 PM #171
The blocks look really nice, I worked with alot of different fastener materials in the aerospace field , they used mostly inconel 718 -220ksi and some mp35N 260ksi bolts in high stress areas, both of these are bullet proof and don't corrode at all. h11 steel,17-22 and 8740 are strong but really bad around salt/water. Dave
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11-11-2016, 10:49 AM #172Junior Member
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Inconel and MP35N are both good choices...not cheap, but make great high temp/ corrosion resistant bolts...I think that carpenter supplies most of ARP's materials and I know they offer C625 as a 220ksi-ys upgrade for bolting solutions under high stress. Probably better at that point to just add studs between the cylinders...
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11-11-2016, 11:56 AM #173
I agree, and I use alot of arp for projects, the arp300 stainless is nice, 160 or 170ksi i think , not sure what that alloy it is they wouldn't tell me when i called them but i think its a286 another very popular aerospace grade, The custom 625 is getting popular but i haven't seen it in any of fastener guides from boeing, regular inconel 625 is not near as strong as the c625 is rated .. ARP is great but SPS supplies most airframe mfgs, I picked up some c625 rolled thread studs on ebay that fit perfect for my brp 3.3l heads, came from a dodge r6 nascar engine kit it also had 7/16 studs and nuts im using for the mains.. Another thing on arp, the generic studs they sell are all really meant for steel with 1-1.5xd on the coarse thread length, i know all the books say thats sufficient for steel or aluminum and the first few threads hold all the load but its bs for really high stressed parts, Maybe in a perfect world, i say 2 minimum 2-1/2 better. Dave
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11-11-2016, 01:59 PM #174Markus' Performance Boating Links:
www.toastedmarshmallow.com/performance
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11-11-2016, 09:44 PM #1757000 RPM
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Dave Strong liked this post
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11-12-2016, 08:13 AM #176
It's worked fine since 1983.
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11-12-2016, 11:07 AM #177
Pretty good rumor floating around about a new SEB Talon 22 getting one of these soon.
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11-13-2016, 08:43 AM #178
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11-13-2016, 10:32 AM #1797000 RPM
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Never said it didn't work. But then 12 bolts really should be able to do the work of 8.
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02-21-2017, 01:16 AM #180
Beautiful yet very simple and clean great job CRT
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