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07-12-2006, 12:50 PM
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#1 |
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On a budget like Fred Sanford
Join Date: Oct 2005
Location: Topeka, KS
Posts: 2,031
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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.
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'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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07-12-2006, 01:27 PM
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#2 | |
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No No
Join Date: Jun 2005
Location: Pueblo Colorado
Posts: 1,781
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Re: might be doing cam swap, help decide.....
Quote:
Alll of the above cams really require screw in studs and beafy springs.1, 2 and 3 would suit your needs. 2 Would be the best choice IMO.
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1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler |
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07-12-2006, 02:12 PM
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#3 | |
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On a budget like Fred Sanford
Join Date: Oct 2005
Location: Topeka, KS
Posts: 2,031
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Re: might be doing cam swap, help decide.....
Quote:
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'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 |
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07-12-2006, 07:02 PM
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#4 | |
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No No
Join Date: Jun 2005
Location: Pueblo Colorado
Posts: 1,781
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Re: might be doing cam swap, help decide.....
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You might also consider a crane E seiers 266. It's close to the comp 265 but has slightly more truck friendly atributes. It also idles like a dream. I have one in my 383 and if you do any highway drving the fuel economy is amazing @2600 I get close to 22MPG. 
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1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler |
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07-15-2006, 02:16 PM
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#5 |
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driving is in my blood
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,748
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Re: might be doing cam swap, help decide.....
Those cams don't need screw in studs IMO, but I would go with a XE262 or even better a lunati voodoo equal.
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-78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me. |
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07-15-2006, 09:16 PM
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#6 |
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Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: might be doing cam swap, help decide.....
The Comp Cams company profiles their cams with a sharper drop off of the top of the cam lobe. This is where the slightly choppy idle originates. The Crane Cams and Lunati have a slightly different slope and it provides for a longer ramp down off of the tip. This type of cam IS more friendly and will have a longer life over the Comp Cams. Don't get me wrong, I love the work Comp does and I am even running a roller comp cam in my 383 stroker on my 84 GMC, but I have had experience with the others and their profile is a good thing to look for.
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07-16-2006, 02:03 AM
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#7 |
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Registered User
Join Date: Mar 2006
Location: Kansas
Posts: 865
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Re: might be doing cam swap, help decide.....
Back in the 60's there was a cam for the vet 327 that put out 375 hp. It came factory with solid lifters. I don't know how it would work for you, but I had a lot of fun with it in a 400 with hydraulic lifters and a high vol oil pump. A 1 ton van with 4.11's that can turn 6000 rpm made it quite the insulter.
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07-16-2006, 01:41 PM
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#8 | |
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No No
Join Date: Jun 2005
Location: Pueblo Colorado
Posts: 1,781
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Re: might be doing cam swap, help decide.....
Quote:
Yep, thats also the reason if there is a casting material problem with a comp cam it will likely go flat where as the others are not as likely to go flat or as quickly.
__________________
1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler |
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