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ted arken wrote:

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Interesting video Russ. How much movement up and down do you (did you) allow?

And did you find your Hp loss?

I think I would tighten the chain until I had maybe 3/8" - 1/2" slack. Now I have almost none.

I'm not really sure where I stand regarding engine performance. I've had a lot of crappy race weekends. At CMP last week, I lost the first two sessions with a clutch problem (had to take it apart and correct an error I made during installation). During that day's race (starting from the back), after 3-4 laps I saw lots of smoke in the mirrors, and, since a Pinto FC was pulling away from me, I thought I had an engine problem, so I shut it down immediately. After getting towed in, I discovered that my catch can had split and sent oil everywhere, including the tail pipe and race track surface (sorry, guys).

The next day (double regional) I went out and had 3-4 pretty good laps during the hardship warm up, then the engine felt like it lost 30% HP so I slowed down and brought it in. The engine was making a loud ticking noise so I called it a weekend.

David Arken wrote:

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Russ,
Last year I posted on a down on power ZX10R. Among the possibilities is a bad atmospheric sensor in the air box or the one for atmosphere. Can you check the error codes? At ThunderHill it was 5mph slow down the long straight and I could overlay data from previous outings and see the difference. If the atmospheric sensor is bad the ECU goes to a rich safety mode, engine runs fine but lack HP due to rich condition.
David

Thanks, David. Good suggestions. I don't have the stock dash, so I'd need to learn how to get codes. I think I've seen it posted somewhere. I'll search and maybe send you a PM if I can't find a how-to.

ted arken wrote:

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You don't need the stock dash. In fact, having it doesn't help you as you still need to decode the flashes. The 141 number doesn't sound that bad, do you know what the AFR was while doing a pull? 273 is high, but if you only ran for 4 laps, and/or it wasn't a hot day then I'd say you definitely need better oil cooling. If you're using the stock heat exchanger, it is very inadequate. We don't use them. Where did you measure the oil temp?

I don't think I have the AFR data, but I do remember seeing it and we all thought it was good - no obvious rich or lean conditions.

George Bugg wrote:

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RussMcB wrote:

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After getting towed in, I discovered that my catch can had split and sent oil everywhere, including the tail pipe and race track surface (sorry, guys).

I caught a bunch of it. I'll ring it out of my driving suit if you want it back! lol

I hope you're getting to the end of the grimlins. Good luck!

Come up to Nashville this weekend and give it another try.

Sorry about that. Truth be told - I was using a plastic oil bottle for my catch can. It was 8-10" away from my tail pipe. I thought that was enough distance but apparently not. Sorry my poor judgement caused a mess.

Nashville isn't an option. I need a long break to fix problems and refresh the checking account. I may be out until the Fall. It's just as well. I have a long list of things I'd like to work on and improve. Hot summertime is perhaps a good time not to be at the race track.