Dyna 2000 ignition timing

I just got my engine back from my builder. I have the APE SSR1325 which includes 1327cc piston kit,Big block cylinder assembly, K435 cams, tappets, retainers, cylinder studs valve springs. The head work that was done is 1mm oversized stainless intake and exhaust valves, ported polished with multiangle valve job, shim on bottom retainers, etc. The ignition module is a Dyna 2000 ignition. I know this is going to be a very hot running engine and do not expect a long life out of it but I would like to extend it as much as possible. That being said I was going to statically set my ignition for full advance at 40 deg. BTDC and then use curve number five, which backs that off to 15 deg at idle. That curve also sets it up so full advance is at 6500 rpm. Does anyone know if this is a good starting point for the static timing (or should I do less like 35 deg. BTDC) and is this and a good curve. Last question is should I set #2 and #3 for a little less advance than #1 and #4 and if so how much? Thanks in advance again!!

I have a little experience with the D2K. The one I had was on a different bike and I am not sure how much the info corresponds from one model of the unit to another... The info you gave doesn't make much sense to me. The D2K has 7 advance curves mapped into its brain. One is similar to the stock curve. Two retard to different degrees and four advance. The unit doesn't require the use of a mechanical advance so to my mind, there would not be a way to static set timing. There would be no way to change timing for two cylinders. You set the timing so that the spark fires at the appropriate time. Since I was running a high performance/small combustion chamber set up with very high compression pistons, I used the most retarded setting to delay spark for more complete combustion and less pinging... in other words, so I could run on pump gas.

Please explain your comments on setting timing static method and different timing for different cylinders... didn't make sense to me. Cheers!

Also, my D2K came with a TPS... throttle position sensor that varied the advance within a predetermined advance curve using engine vacuum. A small line was connected to a vacuum port on a carburetor. A sync port can be used. Not sure if your unit has one. The bike ran better and got better mileage with the TPS connected.

Post edited by: wiredgeorge, at: 2006/01/19 15:43

After spending all that money on the motor you can't spend ~$150 to tune it on a dyno? I think that mapping the ignition curve is just as important as mapping the fuel curve.
That being said, everything I have read said that 35 degrees total advance was best. I understand your concern about the heat issues with #2 and #3, but I don't think that retarding the timing for those two cylinders would help much. A lot of people don't agree with me, but I think allowing a little extra piston to cylinder clearance on the two middle cylinders is a good idea, they run hotter and the pistons expand more because of that.

Is this a race motor or do you plan on riding it on the street?