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Old 10-23-2009, 10:36 PM
PLDRIVE PLDRIVE is offline
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Join Date: Jan 2008
Location: Nashville, TN
Cobra Make, Engine: Backdraft, SBF 351w (463 CI)
Posts: 272
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WOW, you big block guys are soooooo sensitive! Is that Big Block Ego?

Anyway, moving forward I will try to answer a few of your questions.
1. Cam specs.
Duration 268 272, Lift 425 420 at 1.72 ratio (731 722), LCA 112
2. The engine had a lot of time on the dyno (cam was tried at several positions 108 through 112) before they found the sweet spot. Small Flange headers were used on the engine dyno. My headers are custom made, side pipes have Lobak race mufflers (large center) inside. This may account for the loss Ratio? I don't know.
3. I spoke to eagle and Dart about the rod ratio. They were not concerned. Eagle said they felt comfortable up to 7500 RPM with the rotating assembly. Shift light is set at 6600 rev limiter 7100.

http://s540.photobucket.com/albums/gg351/pldrive/
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