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Hey guys, could you tell me how can i check if given camshaft is Comp Cams 59300 ? I've possibility to buy one, but i don't know how i can make sure that it's 59300 and also in good shape? Can i get anywhere dimensions of 59300 which i can compare with my camshaft? Like these one in manual (pic related).
I'm totally confused and i don't want to pay for rubbish
All of this was found with an extremely simple Google search.
Hey, thanks, i also found these information on home page of compcamps but to be honest im not pretty sure how i should use it
Comparing data from you link to the data in manual.
Is it cam lobe height? Forgive me if im asking some basics questions
But what should i measure with caliper and what results should i get to be sure that it's is 59300? Whether it is at all possible?
You'll need a pretty precise caliper, but yes, that number is how much it lifts the valve. I'll admit I'm not 100% on reading cam cards, but I believe the "duration" number is how many degrees of the cam aren't flat, which will take a bit more than a caliper to measure. The best thing to do is to check the journals and lobes, and make sure there isn't any scoring or heat discoloration. If neither of those are present, you should be fine.
I've been doing a lot of research on Cams lately and have picked up a thing or two.
Duration is the crankshaft degrees that the camshaft lobe lifts the valve off it's seat.
The important one is at .05" lift as that was what became the "standard" to be able to compare various camshafts.
Advertised duration varies between manufacturers so it pretty useless as some do it at .010" and others at .006" etc.
There is also Lobe separation angle which is also important and is used to see when the Intake Valve Closed (IVC) event happens. How much overlap there is etc.
Also I believe the FSM shows a lobe height that is the height including the base circle, while the aftermarkets only show the height of the lobe minus the base circle diameter.
It's actually a bit of work to figure everything out and I will have to spend a week or so when I go back to looking at cams to wrap my head around it all again.
So if that's as clear as mud, that would be why. Hopefully some of it is helpful.
Good luck.
Found the snippet I saved to discern IVC from the duration:
Originally Posted by techinspector1@hotrodders.com
Lets say that we had no idea of the intake closing point, but had the intake duration and intake centerline. For instance, let's say we had a cam with 260 degrees duration @ 0.006" with the intake lobe ground on a 108* centerline. This will tell you that the point of max lift on this cam is 108 degrees after top dead center, so that is the center point of the cam, or ICL. Since the cam is 260 degrees total duration, half of that would be on the opening ramp and half of it would be on the closing ramp. So, 130* opening, 130* closing. Figuring clockwise on an imaginary circle, we would start at ICL and use up 72* of our 130* getting to BDC. Deduct 72* from 130* and we find that we must move another 58* beyond BDC to establish our intake closing point @ 0.006". So, on this particular cam, the intake closes @ 58* ABDC @ 0.006"
Oh wait, I didn't see an LSA or Centerline specification on that spec sheet. Oh nvm, it's on the main page in the overview specs.
Comp cams 59300 Spec
