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Old 11-19-2012, 08:53 PM
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Quote:
Originally Posted by cdminter59 View Post
I checked a few out a few cams out on CamQuest6, comp cams simualator. First the
292H-2500-6500, .501/.501, 244/244 @ .050, 351hp@5500 & 377@4000 torq.

XE284H-2300-6500, .507/.510, 240/246 @ .050, 359hp@5500 & 388 torq.

280H-2000-6000, .480/.480, 230/230 @.050, 351hp@5000 & 400@4000 torq.

XE274H-1800-6000, .490/.490, 230/236 @ .050, 358hp@5500 & 405@ 4000 torq

XE268H-1600-5000, .477/.480, 224/230 @ .050, 354hp@5000 & 411@ 3500 torq

With the IVC closing on all of these cams the DCR is 7.6-8.4 which is good for pump gas. These numbers are based on a dual plane and 750 cfm carb. Pocket porting the heads gains around 40HP. Single plane intake and large tube headers can gain 10-15hp each.
Who's gonna be the first to say "But we don't race dyno sim programs!". But good job putting this together. Regardless of the actual numbers, what it shows best is the relationship between the different durations.

And judging by what I see, the XE268H ain't that bad, either. Especially w/the mild gears and stall. Comp's dyno sheet has it down for 342 HP @ 5000 RPM and 413 ft/lbs @ 3800 RPM using Dart S/R's and a 3310 Holley. Probably long tube headers too. Manifold Vacuum is 15.5" Hg @ 800 RPM & 17" Hg @ 1000 RPM w/ no load.

BTW, Comp also has a dyno sheet on the XE274H, it shows 369 HP @ 5900 RPM and 410 ft/lbs @ 3900 RPM using same parts as above. Manifold Vacuum: 11" Hg @ 800 RPM & 14" Hg @ 1000 RPM w/ no load. Get this one ground on a 108 LSA...

The rest of their cams w/dyno sheets are here.
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