Project: ThunderStroke
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Senior User
Joined: Nov 2008
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From: Sorrento BC, Canada
Yes, but I used the stock specs from the cam spec book for comparison. They showed the stock specs as: ICL 103* Duration 176* Open .050 -15* Close .050 11*. So from those specs the intake event was advanced 7 degrees. The grinder said they had to take off .030" on the intake lobe to get my numbers. Did you find different stock specs?
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Joined: Dec 2004
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From: Maple Valley, WA
I degree'd in two stock cams, and they were both on a 98* ICL. I also had a stock cam run on a cam doctor.
Now, Im not saying your wrong, looking at your specs, seems to me the only difference is the ICL, so its very possible there could be some variation, who knows what kind of tolerance IH held on the grinds....
Now, Im not saying your wrong, looking at your specs, seems to me the only difference is the ICL, so its very possible there could be some variation, who knows what kind of tolerance IH held on the grinds....
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Joined: Nov 2008
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From: Sorrento BC, Canada
The exh lobe centerline is also different at 109.4 vs 105. Looking at your specs it looks like going off cam book stock specs is quite useless, and that degreeing is the only sure way to know exact specs. Looks like Im going to have to degree my cam, and talk with my cam grinder.
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91dirtydiesel
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
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Feb 19, 2012 03:05 AM
