OST-043: Deutscher größerer Ventilkopf

[oldeskewltoy]

This box came from Georgia..... but my client is a bit further away....... anyone care to take a guess where?













More to come.......

[Bean]

oversized valves build for some one over the pond I assume

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[oldeskewltoy]

(01-28-2017 02:31 PM)Bean Wrote:  oversized valves build for some one over the pond I assume

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[oldeskewltoy]

from another forum Wrote:and Kelford cams. Cam specs please.

this is one of Kelford's bigger cam options - 193HV-A...

and the specs...



Question: What does that cam card tell me that adds to my work????


The head is pretty "skanky"....





Disassembly goes smoothly enough....




Journals in decent shape.... and chambers not too bad... although the valve seats have seen a great deal of moisture, good thing those seats will be removed for larger seats





More to come........

[Bean]

the overall lift is very close to my catcams but with added 10° each at 1mm lift and a good 1mm at TDC... that's going to need some generous valve reliefs in the pistons especially considering the OS valves as well as reliefes next to the lifters so they can spin at all.

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[oldeskewltoy]

(02-01-2017 08:56 PM)Bean Wrote:  the overall lift is very close to my catcams but with added 10° each at 1mm lift and a good 1mm at TDC... that's going to need some generous valve reliefs in the pistons especially considering the OS valves as well as reliefes next to the lifters so they can spin at all.

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My client says he has a long block with Atlantic type pistons fitted....

from another forum Wrote:The lift is so insane that it will be hitting something? You need to make it clear?

yep.... I'll need to clearance each cam lobe so that it can rotate without obstruction

oldeskewltoy Wrote:although the valve seats have seen a great deal of moisture, good thing those seats will be removed for larger seats

Yes it is a good thing.........

This is #8 valve's seat




And these are #5, 4, and 3






more to come......

[Project D]

What did you use to clean it, bead blasting?

[oldeskewltoy]

(02-03-2017 12:07 AM)Project D Wrote:  What did you use to clean it, bead blasting?

as a final step.... yes... but there is a different process the machine shop uses to get it cleaned... once cleaned chemically, then it got glass beaded. and to make sure there was no glass beads left... the galley plugs were removed, the galleys cleaned, and the head threaded for thread in galley plugs



more to come........

[oldeskewltoy]

Top view has the intake side deburred, as well as having the lifter bucket bores shaped to allow the cam unobstructed passage. Bottom view has intakes, and exhaust side done.




a bit closer view of deburring the casting.





and a bit closer view of the bucket mods required for this set of cams






more to come.........

[oldeskewltoy]

from another forum Wrote:Dan, request still stands, before and after IN flow figures.

more to come........