Timing curves, TDR vs TZR

[m in sc]

so, having a 3xc motor in my tzr has led to no real interesting discoveries.. except the static timing i have found. but, thats irrelevant.

what I was wondering is, the timing differences between the 2 motors. the cyls are the same, head, etc. but the tdr (which i have ridden before) does have better lower end from takeoff. this being said, and i know theres gearing differences, etc, the timing curve on the tdr and r1z are mor eadvanced, especially down low.

look at what borut recommends, and isnt that far off from stock tdr timing under the powerband, at least down low with 19 degrees :




now, the stock tzr curve is 15 degrees down low:




my opinion is that with the programmable ignition, you could hybrid the curves for better low end. this would be

basically

19 degrees
then ramp it up to 26 as the tzr does, and everything after that use the optimized curve borut has for the tzr, which is more topend oriented, to gain better pull off on the tzr from a dead standstill.

I have mine at about 17 right now, on curve 1 and its def better, will set to 19 in the controller and see how it goes. has anybody else done this for better low end performance on a street ridden tzr 250? I cant see the downside TBH.

thoughts?
   

[problemchild]

a TDR or r1z isnt direct comparable... tdr has in first and r1z also in second gear a bit shorter transmission and the chaindrive ratio is also different at all 3...
and the exhaust are on all 3 different, r1z has 26mm Carbs tdr/tzr has 28mm but all 3 got different airboxes... tdr/r1z got a digital ignition (afaik) instead the tzr "analog"
so its a bit complicatetd to compare a igitioncurve and/or power...
try a different curve, you would not harm anything if you dont go too far... but i think the feelable +power and the different curves are because of carbs/ignition digital/exhaust...

[m in sc]

I hear you and yes... but, i have a zeeltronic and an r1z? (3xc) motor. ... ign curve is a curve, regardless how it gets there. even my 66 ford has an ignition curve. lol.  its just done with weights and springs.

only thing really tzr specific on the powerplant is the carbs and pipes, which i get can be an issue on low end, hence why i'm trying to compensate with the timing curve. I mean, it runs really well right now, took it out last sunday. just wondering if anyone has tried this on a 'tzr' stock carbed/piped bike?

[41juergen]

best would be to book a day on the dyno, everything else is based on the "pants" dyno...

[m in sc]

there's a local dyno, i've had many bikes there, my point was for better takeoff from a light, which is absolutely 100% 'feel', or drivability.

[m in sc]

Borut saw the video, told him where i landed he confirmed I did it correctly, static landed at 31. that being said, i wrote a curve where i set the 1000 rpm top 17, 2000 to 19, and the rest as '2' tzr curve on the zeel, added some at the top end as well. rode it today, it is absolutely better on takeoff.   would recommend. I have the map switch setup, and this is curve 1, curve 2 is the stock one, so i can back to back it, which i did.