jed goe to odp and look at the video of my ds smoking, i washed the rings out on my brand new 730 kit with only maybe 4 hours on it or so. you wont believe how much smoke comes out of it.

 

Scott, I will try. But I have dial up and if its too large It could take all night. Thanks though.

 

Just got the news. I broke a piece off the piston and it was bangins against the head. It bend the two exhaust valves so they couldn't close. No damage to the cylinder at all. Anyone seen something like this when not on NOS or turbo'd. I was cruising up the valley at midnight to make a phone call when It heated up and shut down? Zero compression afterwards and this is what I found.

 

CrackerJack, was it a stock build/piston? There have been some reports of pistons fracturing in 04 models. Not sure if it applies, but you might want to look into it.

BD

 

It was an 05 stock bore stock piston that fractured. Out of warrantee. I have a kind person donating a RW piston to rebuild the machine. The worse part of the ordeal is it wasn't my machine. I Borrowed a buddies for the trip and it overheated in the first 10 minutes. That will teach me to borrow anything.

 

Dang Justin! Sorry to hear that! [img]i/expressions/face-icon-small-mad.gif[/img]

My boiler combustion guys say that a 60-degree change in temperature equates to a 1% change in O2. That's not A/F ratio, that's a 1% drop in O2.

Sure doesn't seem like much but, (someone confirm my numbers here) a 1% drop in O2 = about a 14% drop in AIR (O2 being about. . . well. . . a small percentage of air.)

Stoichiometric (sp?) (ideal combustion) is about 14:1 Air to fuel ratio. So, as you go up 60-degrees off set-point you are dropping to about 12:1 air fuel ratio and as you drop 60-degrees off set-point you are going to about 16:1 air / fuel ratio???

Does this sound correct?

Some engineer can confirm this. Just trying to make sense of it all.

 

Im no engineer, but the only way you are going to get a drop in 02, is if you RAISE the temp. Cooling it creates the opposite affect. As far as air/fuel ratios are concerned, everything that I have read says 14.7:1 is the optimum level. But I would think for the novice it would be more about the change in fuel jet sizes. Cooler temps mean more air and therefore should mean more fuel.

 

I believe that would depend on if the temp went up or down...If the temp went colder, that would raise the 02 level and make you run lean. As the temp goes up, it would thin the air and make you run rich. Obviously that would depend on what you were jetted for.....I know this last weekend, as the weather got warmer, my bike did better, but not perfect...When it got cold, Crash's stock DS came into perfect jetting and was running like you would not believe.....I was lean in the evenings when the temp dropped...

 

Well apparently Marky and I agree [img]i/expressions/face-icon-small-happy.gif[/img]

 

Oops. . . fixed it.

I get so concentrated on the hard stuff I forget about the easy stuff.