F13 carnage pics
Originally Posted by M6WS6
I got my made from Comp Cams.I tried ordering a F-13 from Futral in that time frame as well ( think thats when it was). I had Comp do a custom grind of it for me since the F-13 was like 6 weeks out at the time....
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Joined: Jul 2005
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From: Herndon, VA
Tough luck on having to get new lifters and re-install everything, especially ($$$)Morels... But you sure got your money's worth out of LS1TECH for letting you know in time to pull it before crazy bad stuff happened.
Well guess what....maybe bigger isn't better after all. On street engines, you see alot more wear and tear when daily driven than you would a track only motor which may only see 100 passes (25 miles) per year. And guess what, wear and tear means more friction. Higher lift cams means more valve spring force which means even more friction. More friction means more higher surface temperature. Higher surface temperature means the material properties of the camshaft are likely to change at some given point and will end up looking look like the above camshaft. If I'm wrong, Id better go throw away my Mechanical Engineering degree and dismiss the last 15 years of my career.
Last edited by 408WS6; Apr 17, 2006 at 11:08 PM.
Originally Posted by 408WS6
Well guess what....maybe bigger isn't better after all. On street engines, you see alot more wear and tear when daily driven than you would a track only motor which may only see 100 passes (25 miles) per year. And guess what, wear and tear means more friction. Higher lift cams means more valve spring force which means even more friction. More friction means more higher surface temperature. Higher surface temperature means the material properties of the camshaft are likely to change at some given point and will end up looking look like the above camshaft. If I'm wrong, Id better go through away my Mechanical Engineering degree and dismiss the last 15 years of my career.
Originally Posted by 408WS6
Well guess what....maybe bigger isn't better after all. On street engines, you see alot more wear and tear when daily driven than you would a track only motor which may only see 100 passes (25 miles) per year. And guess what, wear and tear means more friction. Higher lift cams means more valve spring force which means even more friction. More friction means more higher surface temperature. Higher surface temperature means the material properties of the camshaft are likely to change at some given point and will end up looking look like the above camshaft. If I'm wrong, Id better go throw away my Mechanical Engineering degree and dismiss the last 15 years of my career.
Seems like 9 out of 10 times I've seen this happen in the past (not on camshafts, but the equipment I work with) it was a material issue. And like you pointed out, QA should catch these things...
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Originally Posted by 00SSLS1
then why does your sig say f-13?
Same thing isnt it?Do I really need to state "Custom Comp Cams Ground 230/232 .595/.585 112" ??????? I can just say F-13 and get the job done...No harm in it, so why not do it?Not that big of a deal buddy
Originally Posted by M6WS6
Same thing isnt it?Do I really need to state "Custom Comp Cams Ground 230/232 .595/.585 112" ??????? I can just say F-13 and get the job done...No harm in it, so why not do it?Not that big of a deal buddy
Quite simply, your custom comp cam in not an f-13 no matter how you try and explain it.
Originally Posted by GuitsBoy
Its actually quite a difference from "the same thing". Just because you have the same max lift and duration @ .050 does not mean the cams will be even remotely similar. An unlimited number of cam lobe profiles can all have those same specs while not performaing anyting like one another. If you had matched up the duration @ .006 as well as the duration @ .200, you might get pretty a basic approximation of the f13 lobe, but it still wont likely have the drivability and springlife characterisics of the cam motion lobe futral uses. Theres too many intricate details that go into the lobe profile that wont be identical.
Quite simply, your custom comp cam in not an f-13 no matter how you try and explain it.
Quite simply, your custom comp cam in not an f-13 no matter how you try and explain it.
Not enough of a difference to tell. You can call in and make a cam anywhere, and those are the only specs that come into play. I dont see how they will be that different. Yes it could vary a bit, but not enough to tell.
I can see where you are comming from, but its not a big enough difference. Should perform roughly the same, give or take.Not trying to be hostile to anyone, just stating my point as you have. I just dont see it being a huge difference, and as far as I can tell for driveability to my buddies, it isnt any different. Too close to worry about, thats all Im trying to say
Go find someone who has a 228 comp cam on XE lobes, then Go take a ride in a car with a 228 car with XE-R lobes. While theyre both 228* @ .050, the XER lobes are far more agressive. The duration at .200 will be considerably higher on the XER lobe, as will the lobe area.
Edit: I apologize for being short. Edited my post to be a little less of a dick.
Edit: I apologize for being short. Edited my post to be a little less of a dick.
Last edited by GuitsBoy; Apr 19, 2006 at 04:29 PM.
Im sure alot of people get mislead with otheres posts. Not everyone who posts knows everything. Ive seen it that way as well.
Its kinda like SLP, how slp can sell a ported oil pump for an outrageous price b/c "they are the only ones who can do it" kind of thing. I just dont see how they can be entirly that different. I can see a lil inbetween, but thats it. where the valve open and closes is the same, the lift is the same, so the only difference could be the area between where is opens and peak lift and the area between peak lift and closed. the difference is only in how fast the valves are opening and closing and the amount of time it lingers around max lift, which is pretty limited.the valves aren't open long enough to have huge derivatives from one cam grind to another.
GuitsBoy, I can see where you are comming from, but also see where I am coming from. I wouldnt ever lead someone astray, if I did I didnt mean to.
Sorry, didnt mean to hijack. Back to the main topic. If you would like to comment GuitsBoy, please PM me so we dont hijack. Im not trying to be an *******, just stating my side
Its kinda like SLP, how slp can sell a ported oil pump for an outrageous price b/c "they are the only ones who can do it" kind of thing. I just dont see how they can be entirly that different. I can see a lil inbetween, but thats it. where the valve open and closes is the same, the lift is the same, so the only difference could be the area between where is opens and peak lift and the area between peak lift and closed. the difference is only in how fast the valves are opening and closing and the amount of time it lingers around max lift, which is pretty limited.the valves aren't open long enough to have huge derivatives from one cam grind to another.
GuitsBoy, I can see where you are comming from, but also see where I am coming from. I wouldnt ever lead someone astray, if I did I didnt mean to.
Sorry, didnt mean to hijack. Back to the main topic. If you would like to comment GuitsBoy, please PM me so we dont hijack. Im not trying to be an *******, just stating my side
Last edited by M6WS6; Apr 19, 2006 at 04:34 PM.
