Author	[Modern View]
Snot Nosed Kid 12-20-2012 08:40:38 64.8.170.1 Report to Moderator	The truck head will fit on your 301 block, but you need to use the head bolts, valve cover, rocker arms and push rods from the truck head. The chambers is MUCH smaller. It will raise your CR at LEAST a point. The ports flow much better as well. [Reply]   [No Email]
ss409 12-20-2012 08:54:28 72.53.194.237 Report to Moderator	Re: SD silver diamond in reply to Snot Nosed Kid, 12-20-2012 08:40:38   you can visually see the skinny valve cover. you will also see the ports exposed in the casting where the manifold bolts up. the chambers work best with flat top pistons only. firecrater r tight fit, but can be massaged to fit the domes. its supposed to boost cyl pressure by 50psi. you can port the exhaust side huge! much bigger than the tractor heads, that helps get air moving thru, which the tilt valve heads, r very small thru the exhaust ports stock. aint worth it if she has the big valve cover cause itll be the same as the tractor head if it has the big valve cover. ok well, maybe the cam being a 4000 rpm engine vs a 1900rpm engine, but, we dont know, if the truck cam grind is the same as the tractor cam grind. [Reply]  [No Email]
560gaspuller 12-20-2012 18:35:21 69.4.123.195 Report to Moderator	Re: SD silver diamond in reply to ss409, 12-20-2012 08:54:28   well i took valve cover off and head today. its a strit valve SD. Now is it worth the effort putting a strait valve on my 301 block? should i port it?. thanks [Reply]  [No Email]
560gaspuller 12-20-2012 09:01:25 205.213.113.2 Report to Moderator	Re: SD silver diamond in reply to ss409, 12-20-2012 08:54:28   what years were the strait valve motors? how bout the tilt-valve? [Reply]  [No Email]
ss409 12-20-2012 10:36:51 72.53.194.237 Report to Moderator	Re: SD silver diamond in reply to 560gaspuller, 12-20-2012 09:01:25   thinking they changed close to 47-48 to the tilt valves. ive never traced back how far the sd motors go in the trucks n dozers, the 6cyl of that whole line could date back to early 40s. seen 4, 49 model IH trucks that all had tilt valve heads on em.... gotta be pre 48 to find one. [Reply]  [No Email]
Buzzman72 12-22-2012 23:12:51 74.134.25.51 Report to Moderator	Re: SD silver diamond in reply to ss409, 12-20-2012 10:36:51   The SD engine began production the same time as the L-series trucks...about November of '49, for 1950 models. The SD engines only came as the SD220 and SD240...same bore, different stroke. Only when the tilt-valve BD's came along--and IIRC, the tilt-valves weren't until '58 or '59--did IH go as big as the BD264. The so-called BD308 and BD282 were simply variations on the old BLUE Diamond engines, and were not designed off the SD or "true" BLACK Diamond engines. The BD220, 240, and 264 became the BG221, 241, and 265 when equipped with PCV valves instead of road-draft tubes for crankcase ventilation...and ended at the end of 1968 truck production. 1969 and up IH light truck sixes were purchased from AMC. Not sure what "tilt-valve" engines YOU'RE talking about...but it sure wasn't anything in the SD or BD line of engines. Maybe the Red Diamond engines were "tilt-valve" engines...but their parts won't interchange with an SD engine any more than the Blue Diamond engine parts will. [Reply]  [No Email]
560gaspuller 12-20-2012 08:50:09 205.213.113.2 Report to Moderator	Re: SD silver diamond in reply to Snot Nosed Kid, 12-20-2012 08:40:38   thanks for the info snot nosed kid. i really appreciate it. i know more about the farmall 4cyl motors.will i have to run race gas?.thanks [Reply]  [No Email]