09-13-2006, 10:58 AM
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CC Member
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Join Date: May 2004
Location: Palm Coast,
FL
Cobra Make, Engine: Shelby American CSX 4241 - authentically built
Posts: 2,573
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Not Ranked
Doesn't seem too far off, hp wise. Most 427s chassis dyno in the 390hp range. The torque is kinda low though, for that displacement. Your dyno graph looks more like a stroked Windsor.
Your A/F is kind of whacky, but not too bad. It's a little rich in the mid range, and goes a tad lean at 6k, but it's not so far off that you'd be missing a bunch of hp. I think the dual quads are giving you the crazy A/F lines.
Just for comparison sake, I just finished up dynoing a car with a similar setup. It's a 468 inch 427, alloy heads, with a single carb. The motor "supposedly" dynoed 560 on an engine dyno. On the chassis dyno, it made 398hp/450tq. That was after I tuned it tho, as the carb needed jetting and the dist was messed up only giving about 28 degrees of advance.
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Sal Mennella
CSX 4241, KMP 357 - sold and missed, CSX 4819 - cancelled, FFR 5132 - sold
See my car at CSXinfo.net here >> CSX 4241
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