you will gain some power with more compression jes but only to a certain point i prefer to keep the comp ratio as standard as possable then gain more on advancing the timing.sounds far fetched i know but it works for me and is much safer really it works especially if you gonna do some other mods also.thanx for the advise i will go an look for those cam names you mentioned

You can only advance ignition so far.. After that it becomes a grenade waiting to happen.

Go the 4 C's, capacity, compression, cam and carbs, more of all of them!

basic rule, the bigger the cam, add more compression,due to cam overlap.but don't go overboard. i have used up to 11;1 comp on pump fuel with no problems.but tuning plays a big part.cheers

ernie knows his stuff ,and i think i like that rule ,4 Cs