molecular level? You can check your springs at the 2 spec points and if they are in spec you are good. you are not going to see a speed degredation without a height/pressure change as well. Yes, they do loose form due to memory but again, you would see the pressure change at that point.
Yes I agree so what is the purpose of shimming old springs?Just trying to get people away from that practice.You can shim to make a worn valvespring meet spec but how long will it still meet spec even shimmed?I see them degrade much faster than a new spring.That tells me something has changed and pressure and straightness dont test for it.I guess I am assuming its molecular.
Shimming an old or even new spring increases the pressure at the same compressed height. Shimming because the given spring has too low of a spring constant (k) is completely different than shimming because the spring has worn and weakend. I don't know how long it takes for a spring to have its (k) reduced to the point it would matter for our use. Would be a neat thing to look into though. That is the degredation of our spring types. Hmmm....good old days of physics.
Yes I agree so what is the purpose of shimming old springs?Just trying to get people away from that practice.You can shim to make a worn valvespring meet spec but how long will it still meet spec even shimmed?I see them degrade much faster than a new spring.That tells me something has changed and pressure and straightness dont test for it.I guess I am assuming its molecular.
So I should definitly get new valve springs too?
What other precaustions should I take, I don't want to rebuild it and a few hours later it drops another valve.
Just a friendly FYI, but your lower a arms are on the wrong side of your quad. I can't tell if the top ones are. I'd have to see a picture from above the arms.I can tell by looking that those are Herrmann racing arms. I bet it handles like a dream. HAha You might want to fix that.
lmao, I had no idea, I bought the quad blown a couple weeks ago and I'm new to Cannondales. so I haven't been able to drive it yet, but it will be a blast. Do you think the previous owner put the a-arms on reverse for a reason or by mistake? lol
lmao, i had no idea, i bought the quad blown a couple weeks ago and im new to cannondales. so i havent been able to drive it yet but it will be a blasttt. do you think the previous owner put the a-arms on reverse for a reason or by mistake lol
Probably by mistake. I made that mistake on a banshee once as well.
Since used heads are cheap, just get a used one and go through it checking for cracks, check bucket bores for sticking, make sure cams spin free with valves out, slap a set of new valves in it and make sure the springs are up to spec and you will have no trouble after that. It would be a huge mistake just to whip a used head on without checking. When they drop valves they usually bend the rods to the side and since yours is a Falicon you might be cheaper off to get an updated stocker.
Also, for the valve spring compressor check this out....they don't seem to have it on their site anymore but they may still be able to get it by phone. This is what I have and I love it. It's got room for working with the keepers and you don't have to rig something up.
Falicons are questionable. Anyone who has paid $1000 for them then had them crap out or be out of balance has moved back to our stock reliable crankshafts. Just replace the bearing in a stocker and it should last a LONG time.
You might want to fix that.