The cam was advanced 4 degrees. It held on to the 520 at 4000 rpm's. That was the first reading we could get-something about water grabbing the dyno-I really did not grasp that notion but I am certainly no authority. I will tell you the dyno numbers pulls I do not know how to post them and yes I agree-I also thought 450 . 4000-396.5hp,520.7 tq / 4100-398.5 & 510.5 / 4200 403.8 & 504.9 /4300 405.7 & 495.5 / 4400 408.5 & 487.6 / 4500 409.2 & 477.6 / 4600 408.5 & 466.4 / 4700 / 410.4 & 458.6 / 4800 / 412.7 & 451.6 / 4900 415.6 & 445.4 / 5000 418.5 & 439.6 / 5100 422.6 & 435.2 / 5200 / 427.6 & 431.8 / 5300 432.0 & 426.1 / 5400 435.1 & 423.1 / 5500 436.2 & 416.6 I wonder if the carb adapter used to mount the square bore Holley hindered performance and I do think the carb was too big-950cfm. The problem I have is that my car is tying up a lift in a garage and I just cannot extend my welcome any longer awaiting a different carb. This carb the builder had on hand. Thanks all for the comments.
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