might be doing cam swap, help decide..... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

swb85 · 07-12-2006, 12:50 PM

Pretty sure I have a collapsed lifter, haven't torn it down to verify yet. If it is, I'll probably go ahead and do a cam/lifter swap since I don't know any of the current cam's specs (PO installed it). Thinking about these cams:

Comp 268H: 218/218 .454/.454 110lsa (1500-5500 rpm)
Comp 265DEH: 211/221 .42/.465 110lsa (1500-5750 rpm)
Comp 275DEH: 219/229 .452/.482 110lsa (2000-6000rpm)
Comp XE268H: 224/230 .477/.480 110lsa (1800-5800 rpm)

Motor is a 355 with stock iron heads (mildly ported according to PO), I assume 76cc chambers?(no clue here), performer rpm intake, edel 1405 carb, longtubes/2.5" duals, muncie 4 speed, 3.42 rear gears. No idea on bottom end or pistons. The current cam is aftermarket, has a tiny chop to it at idle, so I think my current valve springs are probably ok (only 12k miles).....would like replacement cam to have close to same overlap, maybe a hair more. Not gonna say no to a bumpin' idle.

Anybody have any input? Other recommendations? The 224/230 is probably as big as I'd go.

07-12-2006, 12:50 PM	#1
swb85 On a budget like Fred Sanford Join Date: Oct 2005 Location: Topeka, KS Posts: 2,031	might be doing cam swap, help decide..... Pretty sure I have a collapsed lifter, haven't torn it down to verify yet. If it is, I'll probably go ahead and do a cam/lifter swap since I don't know any of the current cam's specs (PO installed it). Thinking about these cams: Comp 268H: 218/218 .454/.454 110lsa (1500-5500 rpm) Comp 265DEH: 211/221 .42/.465 110lsa (1500-5750 rpm) Comp 275DEH: 219/229 .452/.482 110lsa (2000-6000rpm) Comp XE268H: 224/230 .477/.480 110lsa (1800-5800 rpm) Motor is a 355 with stock iron heads (mildly ported according to PO), I assume 76cc chambers?(no clue here), performer rpm intake, edel 1405 carb, longtubes/2.5" duals, muncie 4 speed, 3.42 rear gears. No idea on bottom end or pistons. The current cam is aftermarket, has a tiny chop to it at idle, so I think my current valve springs are probably ok (only 12k miles).....would like replacement cam to have close to same overlap, maybe a hair more. Not gonna say no to a bumpin' idle. Anybody have any input? Other recommendations? The 224/230 is probably as big as I'd go. __________________ '85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD Last edited by swb85; 07-12-2006 at 12:54 PM.



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