Ignition timing vs cr
Turbo Mini Forums

How much difference will ignition timing need to be altered if you changed your cr from say 9.1 to 8.5.1, just after a ball park figure,2 or 3 degrees?

When I ran that compression ratio I found I needed about 16 degrees for it to idle nicely. The lower the compression the more timing you should need for the engine to pull nicely off boost.

Phil.

WWW.TURBO-MINI.COM

Yes it's poor before 2000rpm till boost just starts since changing pistons from 6cc disc to omega 10 cc I changed cam at same time from standard 1275 to a Avon ph2 It drove a lot better before and not much quicker than before cam.on boost will it need more advance on lower cr?

If you're running the same boost, but a lower cr in theory you should be able to run more advance.
Obviously if you're running more boost you need to retard the timing.

Phil.

WWW.TURBO-MINI.COM

I found the p2 to be rather boring off cam and off boost in and around the rpms you plod about town
Good cam when reved though
Went back to a kc500 fantastic road cam (na mg)

Yes i moved to the darkside

Instagram @jdm_brett

I nearly got the kc500 , but read good things about p2,wish I had as I don't like revving past 6000 rpm any way.