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Induction heating is used when we weld. It is not neccessary to do so on a normal regrind. When doing stock regrinds the lobe is not reformed. As a matter of fact, it is an exact duplicate with generally only a few thousandths on an inch of material removed. Performance regrinds can have the lobe reshaped. Depending on the profile of the starting core. We can use a rockwell hardness tester to show hardness before and after grinding. When regrinding a cam it is essential to use new lifters to insure a good mating surface for reliablity and proper break in.I know that cams fail. New unused billets and castings. Reground used cores as well. Feel free to call every major engine rebuilder in the state of Washington and ask them who grinds their cams. Ask them what their cam failure rate is. There are people who will not install a used cam. That is just fine. I carry brand new cores just for them. I will sell them exactly what they want. I also have customers who will not install a new one for just the opposite reasons. One thing to consider is that the used cam has already been proven as a good piece. The new one has never been in a motor and is an unknown commodity.A small comparison to consider... when you buy a "new" cast iron skillet what do you have to do before it is used for cooking? It isn't good for cooking until it has been seasoned, right? Yes, a different situation completely but you get the idea.There are hundreds of opinions regarding cams. Some are formed with good information, some are not. It really doesn't matter which you subscribe to. We have a cam for everyones want, desire or opinion. No hard feelings at all. Just try not to force your opinion on everyone else. Give them all the available information and let them make their own decisions.Ken
Induction heating is used when we weld. It is not neccessary to do so on a normal regrind. When doing stock regrinds the lobe is not reformed. As a matter of fact, it is an exact duplicate with generally only a few thousandths on an inch of material removed. Performance regrinds can have the lobe reshaped. Depending on the profile of the starting core. We can use a rockwell hardness tester to show hardness before and after grinding. When regrinding a cam it is essential to use new lifters to insure a good mating surface for reliablity and proper break in.
I know that cams fail. New unused billets and castings. Reground used cores as well. Feel free to call every major engine rebuilder in the state of Washington and ask them who grinds their cams. Ask them what their cam failure rate is. There are people who will not install a used cam. That is just fine. I carry brand new cores just for them. I will sell them exactly what they want. I also have customers who will not install a new one for just the opposite reasons. One thing to consider is that the used cam has already been proven as a good piece. The new one has never been in a motor and is an unknown commodity.
A small comparison to consider... when you buy a "new" cast iron skillet what do you have to do before it is used for cooking? It isn't good for cooking until it has been seasoned, right? Yes, a different situation completely but you get the idea.
There are hundreds of opinions regarding cams. Some are formed with good information, some are not. It really doesn't matter which you subscribe to. We have a cam for everyones want, desire or opinion. No hard feelings at all. Just try not to force your opinion on everyone else. Give them all the available information and let them make their own decisions.
Ken
