After fitting 41mm FCRs over the winter, I made a post here about dyno tuning my 900SS to fine tune the jetting. There was a hang up with the dyno after the first warm up run, and for various reasons I wasn't able to get back there all summer. The bike runs quite well as is, but I'm sure there is room for improvement.
In the mean time, I figured I can maybe get more value for money on the dyno by adding another variable
... so I just received a TPS kit from [email protected] but I have questions:
1) I understand the basic concept of load based timing (I think), but does anyone have a base map with TPS values I could load as a starting point? The engine has said 41mm FCRs as well as 11:1 pistons, but is otherwise unmodified.
2) I seem to recall that the maximum advance, despite the ignitech unit, is still limited by the flywheel lump. So in my case that would be about 36 degrees or so. Getting the most out of the TPS would mean that I would have to drastically increase this at partial throttle, no? If so, how do I get around that limitation?
3) I'm definitely in over my head here as far as engine tuning goes... but I'm also not planning to outsource this project. First of all, there isn't anyone locally I would trust. Second, this is all meant to be a learning experience for me, that hopefully results in an even better bike instead of melted pistons. I got a well sorted 998 to ride in the mean time, and winter is coming anyways...
attached is some random map for illustration purposes. I probably wouldn't go beyond 32-34* at WOT on mine, it was pinging when it still had the kokusan units.
In the mean time, I figured I can maybe get more value for money on the dyno by adding another variable
1) I understand the basic concept of load based timing (I think), but does anyone have a base map with TPS values I could load as a starting point? The engine has said 41mm FCRs as well as 11:1 pistons, but is otherwise unmodified.
2) I seem to recall that the maximum advance, despite the ignitech unit, is still limited by the flywheel lump. So in my case that would be about 36 degrees or so. Getting the most out of the TPS would mean that I would have to drastically increase this at partial throttle, no? If so, how do I get around that limitation?
3) I'm definitely in over my head here as far as engine tuning goes... but I'm also not planning to outsource this project. First of all, there isn't anyone locally I would trust. Second, this is all meant to be a learning experience for me, that hopefully results in an even better bike instead of melted pistons. I got a well sorted 998 to ride in the mean time, and winter is coming anyways...
attached is some random map for illustration purposes. I probably wouldn't go beyond 32-34* at WOT on mine, it was pinging when it still had the kokusan units.
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