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496 Build and opinions welcomed
Building a 496 for my 71 Malibu to replace the 350 small block. Here's what I have so far:
Mark IV 454 2 bolt block 496 rotating assembly: Scat 9000 4.25 crank Scat 6.385 rods Forged Wyseco +20cc pistons Weiand Stealth Oval Port Intake Manifold New oil pump, pickup, and stroker clearanced pan with trap door Lunati retrofit hydraulic roller lifters I planning using the Brodix Race Rite 270 oval port heads. Still saving some cash for that though. So, the obvious question. What cam? It will be a hydraulic roller. This is not a car that will spend any measurable time at the track, so having good vacuum and drivability is more important than ET's. I'm willing to leave a little on the table. I know I can get a custom cam from Straub, but I'd rater spend $300 for an off the shelf cam vs $600 for custom cam if I can. Not ruling it out, but I know there are guys out there who can give real life experience recommendations. My car: 1971 Malibu, 3.55 gears in a 12 bolt, Turbo 350, I will get a torque converter with the stall required for the completed setup. I have been looking at these two cams, what do you all think? https://www.lunatipower.com/Product....d=2156&gid=289 Retro-Fit Hydraulic Roller Cam. High performance street cam. Likes upgraded intake, carb and exhaust. Needs 2800 RPM stall converter in most cases. Requires 9.5:1 compression for maximum performance. •Advertised Duration (Int/Exh): 282/290 •Duration @ .050 (Int/Exh): 231/239 •Gross Valve Lift (Int/Exh): .600/.600 •LSA/ICL: 110/106 •Valve Lash (Int/Exh): Hyd/Hyd •RPM Range: 2200-5800 http://www.herbertcams.com/240-250-d...0lc-2000-6200/ RPM Range: 2000-6200 Advertised Duration: 295/305 Duration @ .050: 240/250 Lift: .570/.570 Lobe Center: 110c Big Block Chevrolet V8 67-93 396-402-427-454 BB Chevy Hydraulic Roller Cam- Strong mid-range power. Stall or manual. At least 9.5:1. Moderate idle. Last edited by chevysquid; 01-18-2016 at 01:13 PM. |
#2
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I have no clue but maybe WildBill or one of the other more knowledgeable folks will jump in.
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John |
#3
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Straub offers the "shelf" Clay Smith legend series camshafts. Mike Jones - camking on TC also offers custom cams for well under $600.
JMHO
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi 1969 Malibu COPO L72/M20/12 bolt 3.31 posi 1968 Malibu LQ9/4L80E/12 bolt 3.73 posi |
#4
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I was checking out one of the clay smith cams also, think it was called the "old School".
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#5
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That's the one. I helped a good friend put together a SBC for his project. We used one of those shelf cams after talking with Chris Straub. It sounds awesome, has great road manners, and makes plenty of power.
I have a custom cam spec'd by Kurt @ Bullet Cams. No data yet, progress on my car has been at a standstill since April.
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi 1969 Malibu COPO L72/M20/12 bolt 3.31 posi 1968 Malibu LQ9/4L80E/12 bolt 3.73 posi |
#6
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Have you tried the CamQuest website from Comp cams? It's a great tool for selecting a camshaft.
http://www.camquest.com/
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1964 Malibu SS, now a LS1 and T56, Back halfed, rollbar, narrowed 9 inch, 4.11 gears and 31x16x15 Mickey SSR's on Weld wheels. |
#7
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Thanks for the link!
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#8
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I think the Lunati is a better cam for you.
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"Good people sleep peacefully in their beds at night only because rough men stand ready to to violence on their behalf."-Orsen Wells |
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