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Old 03-13-2013, 08:00 AM
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Bbc cam question

I have a question for u cam experts. Bullet race cam referred me a hydraulic roller cam 249/255@50 304/312 650/650 110. the setup I have is a bbc 468 10.5 srp pistons 6.135 rods aluminum bowtie heads 390 from the ( zz502 ) dual plane intake 850 carb 3500 stall converter 700 trans 410 rear gear 4000lbs car weekend street and strip car any good info on this cam

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Old 03-13-2013, 08:20 AM
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moderate specd
what is your icl and lsa?
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Old 03-13-2013, 09:55 AM
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Very similar to the cams that I spec for 496 street engines. Makes good power, revs like a small block and easy on parts.
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Old 03-13-2013, 11:03 AM
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Lsa is 110
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Old 03-15-2013, 05:32 AM
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Should be using a single plane intake at this point.

I hope the 700r has been upgraded.
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Old 03-15-2013, 08:00 AM
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Yes the trans has been upgraded and why a single plane this is my first big block that I am building so I am still learning about them
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Old 03-15-2013, 09:15 AM
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The cam and converter are in the rpm range that best matches a single plane intake
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Old 03-15-2013, 11:06 AM
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Ok I see where u getting at the guy at bullet cams told me it would work and make good vaccum with the dual plane along with torque
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Old 03-15-2013, 05:02 PM
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I would think not. That cam will not make much vacuum. Too much overlap.
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Old 03-15-2013, 05:15 PM
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Yeah, no that will not make much vacuum. Even stimulating it with a dual plane RPM will be soft.

A single plane is a good design. If you need to quench the need for breath, it can pull from more area. A good choice for 400hp and up type hot builds. If you are like me and drive your vehicles around at 3000rpm or below, it will be soft on the low end. They used to have low volume single planes, and barrel plenum 2bbls. They had small , narrow runners. They were superb in a short rpm band. A few companies made 0-5000rpm single planes for 4bbls. I have a 318/323 mopar that I switched over to a edelbrock streetmaster 318 4bbl single plane intake. It did make more power and torque from idle-4500rpm than the edelbrock performer intake did.
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