Im just about to set my basic cam timing. The inlet is a newman BD16 and the exhaust is the std.

According to this info on the newman cams homepage: http://www.newman-cams.com/pdf/fordcosworth.pdf the BD16 inlet shuold be set at 105 degrees and the BD8 ex. (wich i have been told are the same as std.) shuold be set at 110 degrees.

I tried today with my std. cam pulleys, and the readings were 122 degrees on the inlet and 107 on the exhaust. So the ex. are pretty close but the inlet are wat off. But thats allright, i have vernier pulleys. Just took a measuremant with the std. pulleys for a control test.

I know the right way to do it would be to get it on the dyno and adjust them contempoary with getting a live map. But thats not a possibility - yet.

My question are, what do you guys use as a base setting? Would it be best just to set the cams as the directions says on the chart = 105/110 or would it be better to set them to 112/112 for an example? To get the inlet within the reccomended 105 degrees i have to move the pulley one tooth on the belt and then adjust it. Which is no problem, but maybe a bit unusual?

 

1 tooth out is a lot, has the head and block been skimmed a lot.
I wouldn't worry about the pointer lining up if you measure it as correct, just fit the inlet cam to std setting, I assume you have pocketed pistons ?
tabetha

 

The block is unskimmed. The head is skimmed a lot, but the head gasket is equivalent thicker so it adds up. If i use the std. pulley is messures 110 degrees with the std. inlet cam and 122 degrees on the BD16 cam. One tooth on the cam is 9,4 degrees on the crank so to achieve the reccomended setting at 105 degrees i have to move the cam pulley one tooth as my verniers only can be moved 10 degrees in both directions. Thats not a problem, its just something i haven't seen before. But i guess its the BD16 cams fault, because when fitted with the std. inlet cam its 110 degrees.

 

10 deg on the pulley equates to 20 deg on the cam iirc