Hi guys,
Does anyone know what method of valve adjustment works best with an RE13 cam? I've tried one valve at a time, as per the BMC book but the tappets were quite noisy, so I did them in firing order, one cylinder at a time and got a much quieter result and finding a number were a little loose after doing them the first time the BMC way. I'm setting them at .017" as GR recommends.

Regards
Al

I do them the way GR recommends, the rule of 9 (modified).
eg when #1 valve is wide open adjust #8, etc. This puts the one being adjusted right in the middle of the cam lobe's base circle.

`modified' means when #8 (exhaust) is open, you will find #6 (inlet) is near open too. Just rock the engine slightly until both are 95% open, then adjust both. Repeat for the others. This way you only have to move the crank round 4 times, not 8.

You will find most good sports cams including RE13 are slightly noisier than stock cams, this is because initial valve acceleration is faster- which increases performance. You can't have everything-

BTW my RE282 cam runs .022/.024" (recommended) clearance with 1.5 forged rockers, and yes I can hear them- just.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks Dr Mini,
As you suggest is the way I have been doing them but I have noticed that there are a couple that remain quite noisy. If I do them by getting the opposite cylinder rocking, I find I can tighten them a little and the engine sounds sweet and there is no notable decrease in power. The fact that I am tightening them makes me wonder if by doing it your way, I am not completely on the back of the cam lobe. I suppose it's up to me to make the choice but I do appreciate your thoughts and help.

Regards and thanks
Al

Are you doing them hot or cold?

I'm doing them cold, dead cold.

Al

Check that your rocker bushes & shaft are not worn. If they are, you get funny results when setting.

BTW, I found S forged rockers are the worst of the lot for rocker ratio & valve lift- even worse than those crap late model A+ sintered ones..

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

The rocker bushes and shaft and valves and guides have only done 5,000 miles and the rockers were faced, so everything is like new. The rockers are forged S ones and I checked to see that nothing had picked up and made a rocker loose. I did the initial set-up as GR suggested, with a dial gauge onto each valve but they were close enough that I could do them as per your suggested method, so all is well there.

Regards
Al