EKHKHK56 wrote:Nice work Gus! Great info and sources. Thank you. George, the heads are 52-53 #s stamped in, 54-56 raised #s. Heads MUST match valve head size and cam lift. 54-56 heads have different chambers, with part of dividing shelf machined for bigger intake valve. And Higher lift. Ks must have about.
.090" clearance above OPEN Exhaust valve and .120" above OPEN intake for clearance but primarily for flow.
GuS wrote:I dont think you will find any larger OD pistons. They used to have them in +08, but not any more.
Excellent if you can get som KH cylinders. If not you can go to Venolia. They make you pistons,110 each. Plus rings They supply ring from Total seal. Qualiy is the best. They make you any size there is rings to. Meaning almost any size. But make sure you know what dim your cyls will clean up at.
Picture of pistons they made for me. These are for a W stroker. I have also had them make me a set for KH approx +08.
viewtopic.php?f=3&t=681
To the "double" top ring. Total seal have a gapless ring. I have very good experience using that on W.
http://www.aperaceparts.com/resources/t ... /rings.jpg
Good luck
GuS
Geodoc wrote:I put a dial indicator on each one of the lifters to see if the lift corresponded to the .375" that you mentioned as the spec for the KHK cams. The lift I measured was between .345" - .360", so I assume what's there are worn KHK cams (K or KK was .325" lift?) . I haven't been inside the cam cover so no info on cam markings, etc. It's garage mate Tom's opinion (and it's his call since he's the one contracted to do the work) that this amount of cam wear is probably acceptable.
Geodoc wrote:As for the different heads - if there turns out to be acceptable valve to head clearance then what is the problem with running the two different ones? I can see if there was appreciably different combustion chamber volumes that gave a far sized diference in compression ratios, that would at least result in more running vibration, poor fuel consumption and other things you'd rather not have. What other down sides are there?
wz507 wrote:Geodoc wrote:I put a dial indicator on each one of the lifters to see if the lift corresponded to the .375" that you mentioned as the spec for the KHK cams. The lift I measured was between .345" - .360", so I assume what's there are worn KHK cams (K or KK was .325" lift?) . I haven't been inside the cam cover so no info on cam markings, etc. It's garage mate Tom's opinion (and it's his call since he's the one contracted to do the work) that this amount of cam wear is probably acceptable.
You’d have to be concerned about where 0.030” of cam lobe disappeared to and the ensuing debris and consequences thereof? Does the bore show evidence of debris present?Geodoc wrote:As for the different heads - if there turns out to be acceptable valve to head clearance then what is the problem with running the two different ones? I can see if there was appreciably different combustion chamber volumes that gave a far sized diference in compression ratios, that would at least result in more running vibration, poor fuel consumption and other things you'd rather not have. What other down sides are there?
Regarding the different heads, I see mismatched head styles used all the time, so if it were mine I wouldn’t think twice about mixing and matching. As Erik cautioned, the only issue to be aware of with the KHK cams is clearance of the IN valve at full lift to the ledge between IN and EX valves. The image below illustrates this issue where you can easily visualize the little crease that is present where the clay ends between IN and EX valves where an IN valve has kissed the head. If you open this area slightly with a burr to provide a little clearance you should have no issues. With a 1.800” dia IN valve and 1.572” dia EX valve, this bone stock as-cast chamber with no head gasket allowed IN & EX valve lifts of 0.430” and 0.440” respectively, so plenty of clearance for a 0.375” lift KHK cam.
Simon wrote:Geodoc, if the owner has no use for those stroker plates after fitting the -54 cylinders, I would be interested in them. I am possibly looking to fit a set of KR cylinders to a KH. Please keep me posted!
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