GoFastRacer

HDF Supporter

      
Big River, Ca
Posts: 63,269
APPD 7.40
Post Rank: 1
Spectra20
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Posted: Feb. 16 2005,7:23 pm |
Post # 23 |
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| Quote (AZKC @ Feb. 16 2005,2:27 pm) | Looking at a decked block, milled heads, and 1.72 rockers and a .570 lift cam with 4* advance with flat top pistons. No wonder the valves were hitting  . How come I have to be the farthest apple from the tree  |
So what is the deck height on the pistons? is it .000, it should be for a good quench area(means more power). What pistons do you have? .570 lift is not that big a deal with flat tops with reliefs, how much was milled off the heads??!. The main concern I have is the cam, you say it was 4* advance, did you degree the cam before advancing it 4*???. Most cam MFG's put between 2 and 4 degrees in to compensate for the chain, now if you add 4* to that you could have up to 8* advance and that's looking for trouble. That could have been part of your problem. Also you never rely on what they say it is, you need to degree it to make sure, I've taken quite a few cams back for that reason!..
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