hanny
Newbie
First time on this web site.I live North Dakota and only get out west 3 times a year. Just would like to know if anyone has tried or experimented with jetting for the ecp k&n filter kits above 8,000 to 11,000 ft. This is a great site for the boys in blue.
Frostbite
TY 4 Stroke God
It sounds like you're headed to Cooke City. I just ran 156.3 (Yamaha jets) at 6-8,000 feet and they seemed fine. I'd try 155.
It's the midrange I had a tough time with though. With the needles one position richer than stock and the Holtzman silver springs this is at least what I thought I saw. On the trail cruising steadily between 8-9,000 rpm it seemed like there was a lean spot. I may have been more on the main jet but if I mashed the throttle it pulled like crazy and the lean bog or flat spot went away. It sure seemed like the upper midrange was lean.
Then while boondocking up and over mountains with the same settings as above the sled seemed rich and seemed to load up in the midrange until I punched the throttle to clean out the blubbering. I imaging it's all about airflow into the carbs? At trail speeds there is way more air available to the engine and it actually leans out the mixture. Just the opposite could be true at slow boondocking speeds? Heck, I don't know but I'd sure like to find out why this is the case. Honestly, I'm convinced their must be a much better needle design that would compliment the use of these filters. Good luck. PB
It's the midrange I had a tough time with though. With the needles one position richer than stock and the Holtzman silver springs this is at least what I thought I saw. On the trail cruising steadily between 8-9,000 rpm it seemed like there was a lean spot. I may have been more on the main jet but if I mashed the throttle it pulled like crazy and the lean bog or flat spot went away. It sure seemed like the upper midrange was lean.
Then while boondocking up and over mountains with the same settings as above the sled seemed rich and seemed to load up in the midrange until I punched the throttle to clean out the blubbering. I imaging it's all about airflow into the carbs? At trail speeds there is way more air available to the engine and it actually leans out the mixture. Just the opposite could be true at slow boondocking speeds? Heck, I don't know but I'd sure like to find out why this is the case. Honestly, I'm convinced their must be a much better needle design that would compliment the use of these filters. Good luck. PB
hanny
Newbie
ECP K&N KITS
Powder blue did you notice any increase in your track speed while climbing with the ecp kit our do you feel it would be best to leave it with the stock air box and with the stock jetting. The sled is great at 1500 ft. I ran it last year in a nontraction drag race on the lake in the open class amd never loss a race that day . When we entered the sled they were calling it an lawn mower, however after the day was over ,all they said was the rxl won again . We ended up runnig with thundercats and an 800 summit in the fiinals.We know the motor pull great but in the mountains it tis totaly diffenent. We used Snow Fever clutch set up with the stock rx1 shorty helix which works great in the flat land. Thanks for the reply.
Powder blue did you notice any increase in your track speed while climbing with the ecp kit our do you feel it would be best to leave it with the stock air box and with the stock jetting. The sled is great at 1500 ft. I ran it last year in a nontraction drag race on the lake in the open class amd never loss a race that day . When we entered the sled they were calling it an lawn mower, however after the day was over ,all they said was the rxl won again . We ended up runnig with thundercats and an 800 summit in the fiinals.We know the motor pull great but in the mountains it tis totaly diffenent. We used Snow Fever clutch set up with the stock rx1 shorty helix which works great in the flat land. Thanks for the reply.
