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Originally posted by ForcedFirebird
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I see that you are going to cut multiple key way's in the crank gear?
Very clever
I was thinking you would be drilling multiple holes for the pin.
EDIT: What's your plan for tolerance compared to the different generations? The Gen1 is almost a press fit gear on the crank key, where as the Gen3 is a loose fit. I would think it needs to match the Gen3 because the crank gear is what takes up the lateral movement. The Gen1 allows the cam to take the slack and the crank gear is stationary.
Do you think the multiple key ways are going to cause issue with the gear strength or stability to hold true timing?
Nevermind, 4140...
PS: What are you using to stain your engravings? Dykem seems to work good.
Very clever
I was thinking you would be drilling multiple holes for the pin.EDIT: What's your plan for tolerance compared to the different generations? The Gen1 is almost a press fit gear on the crank key, where as the Gen3 is a loose fit. I would think it needs to match the Gen3 because the crank gear is what takes up the lateral movement. The Gen1 allows the cam to take the slack and the crank gear is stationary.
Do you think the multiple key ways are going to cause issue with the gear strength or stability to hold true timing?
Nevermind, 4140...
PS: What are you using to stain your engravings? Dykem seems to work good.
I had considered putting multiple holes in the upper gear but don't know how consistent the pin location is. I assumed that GM used a slot in the stock gears to allow for variance.
The lower gear is a slight press fit but not as tight as the GEN-I gears. I wanted it tight to minimize the chance of moving due to higher valve train loads as most people will want these for performance applications. The flame hardened 4140 will be very strong and have excellent wear properties.
The lower gear has the largest cross section of the two gears and is typically the one the is used for multiple keyways. Having said that, I am considering offering the timing chain sets in two forms. One with the multiple keyways and the other with a single straight up key. From what I have seen, the majority of people do not index a camshaft in and would prefer the lower cost product.
So far I haven't used anything for filling the engraving but have looked at some used in military applications.
I milled keyways in a couple of sets today to see how they fit. Looking pretty good. I was planning to have the keyways EDM'd but the cost is pretty high.
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