Monty valve clearances and timing

G

Gbarnes3

Junior member
Guy's I am about to dial in the cams on the monty and as usual the book says one thing and the forum experience says another,
from people that use there monty's, can you tell me what clearances are you using and what is the best valve timing to set and at what valve lift.
Thanks in advance. Glenn
 
Glenn,

As the 500s have a reputation for burning ex valves, err on the loose side.

I set clearances to 0.25mm in, 0.30 ex. on wifeys'.  Not a Monty, just a cooking 500 but no slouch nevertheless.  :D

Cannot comment on valve timing with the Formula cams.  Wots wrong with the stock timing?

piet
 
Piet, thanks for the info I currently have the clearances set at 0.2mm In and 0.25mm Ex but I think your advice is the way to go.
As regards the timing the std timing marks are a compromise due to production constraints but usually the timing can be set more accurately.
Glenn
 
Hi Glenn,
Valve clearance .25 to .3 range inlet/exhurst.The important thing is to have each pair the same.

The best power figures I've seen is with the inlet cam opening the valves at 55 degrees BTDC,valve clearance .26mm.I've gone towards 45 degrees but that lost me power!
The exhurst cam I haven't played around with yet,and my current figure I can't remember - I'm at work at the mo.
Have you  checked your current opening times?

Andy
 
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