![Image](https://gallery.ostportworks.com/albums/userpics/10005/normal_ost-075.jpg)
After discussing this build with my client, he sent me his largeport head, and his Crower cams.
![Image](https://gallery.ostportworks.com/albums/userpics/10005/Arrived.jpg)
Unpacked...
![Image](https://gallery.ostportworks.com/albums/userpics/10005/before_disassembly_with_cam_covers.jpg)
cam covers removed....
![Image](https://gallery.ostportworks.com/albums/userpics/10005/before_disassembly~1.jpg)
and fully disassembled, prior to getting cleaned, pressure checked, and tumbled
![Image](https://gallery.ostportworks.com/albums/userpics/10005/diassembled.jpg)
more to come.......
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)
from another forum wrote:Are those valve seats machined crookedly?
from another froum1 wrote:I'll venture an uneducated guess. A negative number for the exhaust valve closure, i.e. -8.0 BTDC. Perhaps a negative "before" degree reading equals "after"?
PS: Are you keeping the fishing line weight or returning it to the client?
from another forum2 wrote:The nomenclature is very strange to begin with and the visual aid isn't helping at all with the intake going full circle.
The duration @0.05 lift and the opening closing degrees don't add up for me. The intake calcutes to 212 but the exhaust ends up at 228. If I interpret the minus sign for the exhaust wrong I can get it to 212 but then there wouldn't be any overlap (on the contrary all valves would be closed for 8°). Also the ramp seems to be very slow/wide but that might just be me as I'm comparing it to Catcams which are known for a rather aggressive ramp angle.
I haven't wrapped my brain around engine related things for years and it's very late so I might be completely off
Sepheroth86 wrote:I enjoy reading these posts.
I wish this forum was as active as it was back in the late 1990's.
from another forum wrote:I seen the clearance thing but disregarded the 'hot' part entirely as the seemed in the ballpark for 'cold' - maybe another typo?
Have you tried contacting Crower - as there's some blurb about changed specs and stuff?
from another forum wrote:I know it's tedious but in my opinion you would be best off to measure it yourself - if they did change the specs at one point who knows what version you have in hand.
EDIT: as for the illustration it looks intended as an abstract and not to the actual degree as 8° ATDC isn't anywhere close to what is pictured in either of the two drawings