Cam and valvetrain longevity....??? low duration high lift...
#471
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Joined: Oct 2005
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From: Olmsted Falls,Ohio Marblehead,Oh
Curious to see results....
I am a few weeks away from my 540's being finished. similar to Tim, Bob M. spec the cams and heads. afr 325 114 cc the cams are 242.2 664 on intake 247.1 656 on exhaust flat top JE pistons, merlin 3 blocks zero deck and the head gasket he set me up with from cometic is .027. I am running Nickerson 4150 on merlin single plane intakes. carbs flow 994 CFM. as soon as the engines are complete they are going to Nickerson for dyno and tune. I will be happy to provide the results here. I can find out from my builder what the final comp. ended up, our target was 9.8 :1. will post more info as I get it.
#473
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From: Taunton Ma
Definitely won't be any carbon on those pistons
#475
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From: On A Dirt Floor
Zero decked means piston is at the deck. Zero means zero.
Full Force - I'm going with 677

#476
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From: bel air, md
Never gonna happen on Nickersons dyno. After the first pull he's going to tell him the cam is all wrong and he has a guy down the street that custom grinds his cams for $500. His custom cams are actually $250 Erson cams... It will make 100hp more on his dyno with the custom Erson shelf grind.
#478
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From: bel air, md
I am a few weeks away from my 540's being finished. similar to Tim, Bob M. spec the cams and heads. afr 325 114 cc the cams are 242.2 664 on intake 247.1 656 on exhaust flat top JE pistons, merlin 3 blocks zero deck and the head gasket he set me up with from cometic is .027. I am running Nickerson 4150 on merlin single plane intakes. carbs flow 994 CFM. as soon as the engines are complete they are going to Nickerson for dyno and tune. I will be happy to provide the results here. I can find out from my builder what the final comp. ended up, our target was 9.8 :1. will post more info as I get it.
#479
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From: chicago
IMO, the benefits, do not outweigh the risks of playing with extremely tight quenches, on a bbc, unless you are building an all out competition engine. If the piston is at 0 deck, .027 is playing with fire, even with a steel rod. Staying in the .040-.060 range, is fine for a N/A build, and most forced induction builds.
I would imagine that Bob M, spec'd those gaskets, assuming the blocks were being zero decked. I don't know how anyone would know the specific blocks deck height, without physically measuring, if in fact, the block was anything other than zero deck. Unless they are virgin blocks from world products, but even then?
#480
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From: Cape coral, FL
Never gonna happen on Nickersons dyno. After the first pull he's going to tell him the cam is all wrong and he has a guy down the street that custom grinds his cams for $500. His custom cams are actually $250 Erson cams... It will make 100hp more on his dyno with the custom Erson shelf grind.



