Need info on Dunstall 810? WEC R 540 camshaft

I am looking at a camshaft supposably out of a Dunstall 810 with the number WEC R 540 stamped on it.

Does anybody have info on what this might be.

It has no oil scrolls and would require the old combat bushing which I already have in place.

Seen here, http://cgi.ebay.com/ebaymotors/Norton-C ... 19bf5443e7

Re: Dunstall 810 WEC R 540

Maybe LAB can edit the thread title to "need info re:..."

pvisseriii said:

I am looking at a camshaft supposably out of a Dunstall 810 with the number WEC R 540 stamped on it.


Does anybody have info on what this might be.

Click to expand...

I think this photo shows it's actually stamped "PD (Paul Dunstall) /R2 B (not R) /540 WEC"

Dynodave lists a similar "PD R2 B540 WFC" Dunstall 810 cam (he may perhaps have mistaken a badly stamped "E" to be an "F"?) http://atlanticgreen.com/camsurvey.htm

pvisseriii said:

I am looking at a camshaft supposably out of a Dunstall 810 with the number WEC R 540 stamped on it.

Does anybody have info on what this might be.

It has no oil scrolls and would require the old combat bushing which I already have in place.

Seen here, http://cgi.ebay.com/ebaymotors/Norton-C ... 19bf5443e7

Click to expand...

I used that cam for racing:
int.open 71 int.close 72 exh.open 78 exh.close 46
intake lobe centre 90,5
max.camlift int.10,3 exh.9,0 mm
running clearance int./exh. 0,25 mm
int.lift at TDC 5,3 mm
You must use 3" radius tappets and Combat bushings don't fit this cam, it requires needle bearings.

As Nortonspeed pointed out, the cam was supplied from Dunstall with needle roller bearings. It also included an oil pressure hose for the rockers that had an additional line to fitting on the crankcase at the left end of the camshaft. It fed oil to the camshaft which is drilled for direct oil feed to the cam lobes. I have a similar one on the shelf that I've had since the '70s. It's in excellent conditon, and the stamped marks are much more readable. The marks are "PD-R2-1", "B/742", and "WEC"/ I don't know if this one also requires radiused lifters. I just took another look at it, and the lobe shape is pretty square, so I suspect it is not meant for a flat tappet. If anyone has info on this particular grind, I'd appreciate it. I've only been saving it as a bit of history, but I'd still like to know more about it.

This is a section from one of Dunstall's catalogs that shows the needle bearing arrangement



And another page showing the oil feed pipe



Ken

Thank you so much Ken and Nortonspeed, I think i will leave that one alone.

FWIW I have the same cam as the ebay cam, purchased new in 72. It is still in the box and here is some info from the enclosed instruction sheet. (I already have the photos in photobucket)







I think this next info is from a Dunstall Tuning Manual:

The wealth of knowledge on this Website is astonishing. 8)