454 mag valve interference
#1
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Thread Starter
454 mag valve interference
I am installing a roller cam in a gen IV 454 mag. Its installed at 0 meaning no advance or retard. It has been rebuilt 30 over and has keith black replacements. I do not have the part number yet. Does it sound right that there is an interference on a stock bbc? It is only kissing the piston as it opens.
Cam specs. Int/exh
Adv dur 271/279
dur @.050 224/232
valve lift .591/.601
lob sep 112
Cam specs. Int/exh
Adv dur 271/279
dur @.050 224/232
valve lift .591/.601
lob sep 112
#3
Registered
The valve should not hit the pistons in a stock configuration with that cam.. Could be installed a tooth off, I see the pistons were changed with 30 over. are they stock replacement pistons? or slightly domed? are they hung on the rods correctly? bottom line is the cam alone, and installed correctly should be fine. IMO