Originally Posted by
Jonro
First off i have to say this engine is running awesome, nearing the 4ltr mark.
But im having major problems with the carb binding with the engine in my 8ight and flexing of the radio tray, which in an 8ight can only mean certain death for a servo.
I've tried adjusting my linkage and carb set-up every which way possible, different length servo arms and all. The funny thing is when the engine is cold and i think i have it set right the carb movement is buttery Smooth and no radio tray flex at all but when it gets any heat into it its a totally different story.
When up to temp it totally binds up, so bad that it wont get past half throttle. I've tried adjusting this thing every way possible, different length servo arms, different carb rotation positions and different ball linkage positions. No matter how good i get it when its cold, once it heats up it binds like hell.
Any ideas?
I love this engine so much that im almost to the point of selling this damn 8ight with its stupid servo set-up and getting a conventional servo tray set-up buggy.
Originally Posted by
ultragraffics
Jonro - Pull your carb apart and inspect your slide. i have a feeling that it has a bur on it where the idle gap is adjusted. I would be lead to believe thats what happened...
This can happen when you adjust the idle without pulling throttle slightly.. Dremel the bur off or use some scotchbrite. Also when you remove the burr dont be afraid chuck up the slide on a drill and run it some while in the carb body. It helps free it up some and may prevent additional sticking.
Some guys have this problem some dont. It seems hit or miss.
Hope that helped...
Originally Posted by
Jonro
Aww! i really don't wannabe pulling apart my brand new GRP carb, but i guess it has to be done, it cant be good for it anyway the way it is binding up atm. Thanks ultragraffics.
Originally Posted by
ultragraffics
No problem...
These are great engines. They just don;t have all the little quirks ironed out quite yet. They are well worth the little extra effort though...
Ok update, i pulled apart my carb. The slide looks very clean and no burs at all(really is very nice workmanship in there). The actual in and out motion of the slide is quite smooth but is a little on the tight side. So im guessing as the carb heats up when running, the slide is expanding in the body and binding? I still need to pick up some scotchbrite and try running that over the slide.
About putting the slide in a drill and spinning it in the body for a while, should i heat up the body and slide first then try that? as its really smooth when its cold and i cant see that doing much when its cold.
Thanks for any help.