Dyno Time


dont forget brand new spark plugs(extras), jets, your fuel you plan to run and keep track of what you change so you know where you gained or loss, good luck..!!

edit: never mind the jets after seeing your build up post..lol. Your heading to the right guys to dyno tune it!! Lets us know how it comes out. :2strokes:

where did ya get the alum handlebars?? I have a new upcoming winter project and need a set just like that.
 
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mrvip, the bars i got off ebay. They're not aluminum....they're chrome. I have to change mine, so those ones are going to be for sale. With the riser I am using, the throttle and brake don't clear the hood, and I'm not notching the hood to make it clear. I'll keep you posted if I sell them.


Dyno time begins at 10:00 am.
 
Dyno numbers are in. We had a few issues there....my CDI messed up, but other than that we had good results.

The motor built a max of 263.4 hp at 9300, and 150.0 ft. lbs. of torque. I am quite pleased. :)

The sheets are very light in colour, so there's no point to scan and post them.
 
you can darken them up if you scan them, would be nice to see the numbers,fuel flow etc. the graphs are not really that important but the numbers will reveal the power curve, sounds healthy.
 
wow wish i could have that sled for trail ride lolllllllllllllllll........... go valin go
 
Ok, now for the fuel numbers.

Of course they look scary low, but i assure you that there was more than enough fuel. The reason it is low is because of the way the CPC carbs draw the fuel, and the fuel meter on the dyno didn't read the fuel like on most carbs. All of the sleds he dynos with CPC carbs have similar low fuel numbers. We checked the wash steady throughout the day, and it was substantial. The fuel amount on this run was very safe....quite close to the mixture I will be running for my 2000' runs. I could have jetted it down to pull a big number, but I am more concerned with a safe number than a big one that can only be achieved on a dyno.
 
Valin, I likey!!! question: do you have solid motor mounts in it or hard durometer motor mounts? just curious as to looking at the fuel curve. I know you explained about the carbs but I was just curious. thanx :2strokes:
 
The mounts are just hard durometer, with a solid torque arm that goes from the pto side head down to the bulkhead near the jackshaft, as you can see in the picture. I am thinking about going solid for the rear mounts though. I want to see if the motor torques under a load first.
 

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Just be carefull with the solid mounts and hard durometer mounts, they like to foam the fuel in the float bowl from excessive engine vibration and your fuel curve will get all wacky, when you add a bigger jet it gets even LEANER as you suck up more of the foam then fuel. I had this very problem on a dyno. :o|
 
mrviper700 said:
Just be carefull with the solid mounts and hard durometer mounts, they like to foam the fuel in the float bowl from excessive engine vibration and your fuel curve will get all wacky, when you add a bigger jet it gets even LEANER as you suck up more of the foam then fuel. I had this very problem on a dyno. :o|
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Watch out for Toucan Sam and The Quaker Oat man as well.
 
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