HOW MUCH TIMMING SHOULD I TAKE OUT ???

[THE ICE MAN]

I have a motorcycle and it's giong to have 240 h.P. on low boost at 6 lb,s
now when i go to 10 lbs and then 14 lb.s how much timming should I take
out ?
I am trying to find out what the formula is ? General rule of thumb??
For so many #'s of boost you take out ____?__ degrees of timming.
I will have water injection also, but still want to know about timming.
Thanks.

[Richard L]

How much water are you planning to inject?

1) the water to fuel ratio is a good guide line to boost.
2) a/f ratio has to be noted before estimating igniton advance.