Gday fellas, I know the stock CR is low. But If I put Andrews 26 cams in and pull the heads to get them cc'ed/decked and use a .030" cometic head gasket...... what is the "ideal" CR I should be aiming for? 9.5:1? or 10:1? or something in between?
I have decided against doing a big bore build in favour of just cams and a bump in compression. Bike is 2010 Bagger.
Cheers, berms.
hi. the andrews 26H will go in with-out pulling the heads, the cam is not that hot the timings are short durations, to pull a heavy bike but the lobe centre is not so early at inlet L.C. =102 degs & exh @ 106 degs L.C. it will come on at about 1500 to 2,200 rpm , would pull good midrange only to upper mid is good for a heavy bike if you want the pull down lower in the revs look for a inlet L.C. of 98 to 101 degs , the new 44H cam has wider cam timings but a inlet L.C. of 100 degs & exh L.C. 106 deg will give a good spread of power mid & upper rev range 9.5 to 9.8 comp ratio bring the power slightly lower in the revs range . but don't go too high in the C.R if its a touring heavy weight bike . cheers
