can a cam be changed after its been ground?
can a cam be changed after its been ground? Can advance be ground into a cam after it has been ground? The way it is always referred to and worded makes it seem possible. Could I send in my cam and have some advance ground in? If possible what else will change?
Originally Posted by squealingtires
Can advance be ground into a cam after it has been ground? The way it is always referred to and worded makes it seem possible. Could I send in my cam and have some advance ground in? If possible what else will change?
HERE
Really, I thought it had to do with the lobe separation angle between intake and exhaust. I'm still learning. I've got the SLP adjustable double roller so I'm good to go then. Any recomendations on advance from the timing chain for a Comp XER 238/240 .605/.609 on a 112 LSA. I'm wanting to move the power band down to peak around 6000 rpm in my 402 stroker.
You wouldn't be able to keep the same lobe profile (lift & duration) if you reground it at this point. It would end up a smaller cam.
What is the intake centerline now? 112? Don't know if you'll ever get that cam to peak at 6000. Maybe on a 106 or 108 ICL, but you'll likely give up a bunch of HP too. You may also run into p-v clearance issues on the intake valves advancing it that far.
Talk to Comp......
What is the intake centerline now? 112? Don't know if you'll ever get that cam to peak at 6000. Maybe on a 106 or 108 ICL, but you'll likely give up a bunch of HP too. You may also run into p-v clearance issues on the intake valves advancing it that far.
Talk to Comp......
Joined: Nov 2001
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From: Cecil County Raceway!!!
Originally Posted by squealingtires
Really, I thought it had to do with the lobe separation angle between intake and exhaust. I'm still learning. I've got the SLP adjustable double roller so I'm good to go then. Any recomendations on advance from the timing chain for a Comp XER 238/240 .605/.609 on a 112 LSA. I'm wanting to move the power band down to peak around 6000 rpm in my 402 stroker.
there are 2 variables you are referring to:
Lobe separation is the physical angle between the int and exh lobes. This is set once the cam is ground.
Advance/Retard is the amount the cam is rotated in the engine from the "straight up" position of where the center of the intake lobe is set to the crankshaft angle = to the lobe separation angle. You can have a cam ground with a specified advance, or you can physically do it by rotating the cam with respect to the timing gear (by means of an adjustable chain set)
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Joined: Nov 2001
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From: Cecil County Raceway!!!
Originally Posted by squealingtires
I've got the SLP adjustable double roller so I'm good to go then.
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Brett Foote yeah the intake centerline is at 112. Come to think of it. Making that cam peak at 6000 will probably be impossible now that you mention P to V issues. Comp says on 346 with good heads etc. the cam peaks aroun 7400 when installed straight up. All things being equal, what do you thing the larger 402 displacement will bring that down to?
Originally Posted by squealingtires
yeah the intake centerline is at 112. Come to think of it. Making that cam peak at 6000 will probably be impossible now that you mention P to V issues. Comp says on 346 with good heads etc. the cam peaks aroun 7400 when installed straight up. All things being equal, what do you thing the larger 402 displacement will bring that down to?
Originally Posted by squealingtires
yeah the intake centerline is at 112. Come to think of it. Making that cam peak at 6000 will probably be impossible now that you mention P to V issues. Comp says on 346 with good heads etc. the cam peaks aroun 7400 when installed straight up. All things being equal, what do you thing the larger 402 displacement will bring that down to?
Originally Posted by 1fastWS6
You wouldn't be able to keep the same lobe profile (lift & duration) if you reground it at this point. It would end up a smaller cam.
What is the intake centerline now? 112? Don't know if you'll ever get that cam to peak at 6000. Maybe on a 106 or 108 ICL, but you'll likely give up a bunch of HP too. You may also run into p-v clearance issues on the intake valves advancing it that far.
Talk to Comp......
What is the intake centerline now? 112? Don't know if you'll ever get that cam to peak at 6000. Maybe on a 106 or 108 ICL, but you'll likely give up a bunch of HP too. You may also run into p-v clearance issues on the intake valves advancing it that far.
Talk to Comp......
