just got my 383 from atk today, well i got an isky 280 mega & my center lobe is supposed to be 108, but i keep ending up with 103, am i going to have to get cam degree bushing to achieve 108 or can i run it like that, my freind said run it like it is but i just dont know, any help would be appreciated :beers:
cam degreeing issue
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I am assuming you mean 108 & intake lobe center?
How are you finding TDC?
What timing set do you have?
What are you doing with the engine?
What is the compression?
103 would be 5° advanced & most likely fine for most applications
ya i meant 108, with a summit cam degreeing kit, as for engine atk 383 short block procomp heads 64 cc chambers 190 runners 202int, 160 exh, about 10.9.1 comp when its done, i havent built an engine in over 25yrs so im out of whack, got a 67 el camino so here i am, so running it at 103 lobe center will work ok...
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If you are getting 203 you are doing something wrong you need to start at square one & figure out what it is you are screwing up here
If it is 103 it should be ok
If you have a 3 key crank sprocket you could retard it 4° & be pretty much where Isky suggested assuming 103 now
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Are you making sure that your always turning the engine clockwise to eliminate chain slack?
Have you guys found that the isky megacams like to be run "straight up"? I know that's what the cam card says, but it seems like most people advocate installing almost every SBC cam known to man 4 deg advanced.
Mike: I think you said you run isky stuff a lot - do you put them at 104, or 108?
Mike: I think you said you run isky stuff a lot - do you put them at 104, or 108?
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