Topic: TIMING CURVE?

[juliorice]

I'm putting together a 71 cb750 and here's what I gots.  836 Wiseco.  Ported and polished head. Titanium retainers, heavy duty springs.  Webcamshafts 63a cam. (don't remember the #'s offhand.) 29mm Smoothbores.  And.. MSD MC-4 ignition.  I'm not building this bike to race, just want a bad ass daily rider.  I've been laughed in my face for the MSD, but I work in a machine shop that makes a lot of parts for MSD, so I figured only the best right?.  The MC-4 is programmable, and I keep looking for the stock timing curve as a place to start, but can never find it.  That's how I got to this site.  Pretty cool by the way.  If anyone can help me out here it would be greatly appreciated.  Thanks and take it easy.  Julio

[turboguzzi]

welcome to HiPo, and dont forget we love pics, loads of them

a bit out of my depth on your specific setup but a typical dyna S, common fit on CB's of all sizes, will give a linear 0-25 (add your static timig to those figures) advance between 0-2500 rpm and then stay fully advanced, as a basic setup it could be a starting point.   

some others will chime in surely with more precise figures.

TG

[Nikkisixx]

Great question.  I'l add (if I may) what timing curve others may have found optimal?