BBC Chevy 496-572 Comp Cams 615/615 Lift 260/266 Dur OE Hyd. Roller Cam 01-000-8
|Product Type||Shipped Product|
|Number of reviews||0|
Comp Cams OE HYDRAULIC ROLLER 615/615 Lift 260/266Duration 112 Lobe Sep. Special Grind Camshafts 01-000-8
This cam has a step nose for use in oe roller blocks.
This is our second most popular cam choice in our line of bbc street rod engine builds that range from 454 up to 632 cubic inch.
Part number: 01-000-8
112 lobe sep.
Comp Cams bbc 'Xtreme' Step Nose Hydraulic Roller Camshafts. We also offer this cam in a retro style for use in early model blocks.
This cam is our official Cam Choice # 1 in all of our bbc engines. It is the perfect size to offer maximum power without creating a great amount of stress on the valve train. This profile is not only somewhat easy on the valve train, it makes a huge amount of power on bbc street rods, considering its profile, and without the need of going to a solid roller cam set up. It is very important that you run higher than normal spring pressure with this cam. We recommend the Comp 953-16 springs. Cams that are 600 lift or greater pose a stability issue in bbc engines that turn above 5800 rpm. The Comp 953-16 springs are exactly what you will need. See our other listings for these springs.
This cam has a very unique profile. Our former cam choice # 1 profile was nearly identical in lift and duration and had a 110 lobe sep, and it made approx. 35 hp less on every combo we ran it on. Our new Comp custom grind is setup with a 112 lobe sep, yet still makes so much more power, and with the 112 lobe sep, creates a safer setup overall for the engine than a 110 lobe sep.
This is an amazing cam in every respect. As you may know, there are many aspects to a cam’s profile besides lift, duration and lobe sep. and Comp Cams has produced an excellent cam that works very well in all bbc street rods. We’re going to list below our actual dyno results on every size of bbc engine we have dynoed with this cam. We have used it in at least 300 bbc engines, from a 454 up to our 632 in the past couple years.
Official Dyno report on our 572 engine with this cam, AFR heads, and a single plane intake.
We offer two more amazing Comp cam profiles that we’re very proud of. For those running the smaller bbc engines, we strongly recommend our Cam Choice # 2 or 3 for improved low end response. If you’re building a 454/468 engine, this cam would be considered very radical, and would require compression ratio numbers in the high 10's to operate well. For those building a 496 or larger and want the very best top end power available in a hydraulic roller without having to spend huge amounts of money to stabilize the valve train, then this cam choice is the perfect choice for you.
You will have to run a higher than normal grade lifter and slightly higher than normal spring pressure. Regular drop in roller lifters will not work properly with this cam. They are not able to handle this much lift and duration.
Our regular Howards Tie Bar hyd. roller lifters were on the verge of valve float at peak power rpm on the smaller bbc engines. As you may know, the smaller cubic inch bbc engines will require a bit more rpm to make max power, and right at 6000 rpm, the regular street tie bar lifters were allowing light valve float to enter the picture. This is evident on the dyno, as the engine takes a sharp nose dive right about 5900-6000 rpm. We were also able to hear the engine flutter right right at 6000 rpm. If you follow our recommendations on lifter and spring selection then you will not have a problem with valve train stability.
Valve float to a minor degree can allow a valve to come loose from its locks. This could spell instant doom for your engine. It would be fair to say that most dropped valves in bbc engines happen when the rpm is taken past the valve train limits. Each time minor valve float comes in, it is weakening, or may we say, creating excessive wear on components that eventually lead to a dropped valve.
We have many allies against such problems, such as the Howards Max Effort lifters, light weight PBM Competition valves, Comp Cams 953-16 springs and 308 retainers. This is what we use in our bbc heads that run this cam. We also use high quality light weight roller rockers.
Listed below are a few important solutions to preventing valve train issues while having maximum performance and longevity in your engine when running large lift cams.
The solution to running a hyd. roller cam of decent size in a bbc engine is an easy low cost fix, thanks to the Howards Max Effort lifters and Comp 953-16 springs. The cost is only slightly more than the regular Howards street tie bar lifters, and they are undoubtedly the most stable hyd. roller lifters on the market without going to all out racing hyd. lifters. The Max Efforts are also very quiet. Not sure what rpm range they can remain stable at, but we have pushed some of our bbc engines up to the 6500 rpm range in order to establish the fall off point of a particular build. Fall off on hp levels are gradual up to 400 rpm past the max hp rpm range when using these special lifters, and that's the way it should be. We now use these lifters with all three of our bbc cam choices.
The next big cause for valve float when running a cam in the upper lift and duration range on a bbc engine would be having too low of a spring pressure. Regardless of what some may say would be the correct spring pressure, we know what it should be for safe operation and good performance.
We also offer this cam in a retro roller style for use with early model blocks.
THIS AD IS UNDER CONSTRUCTION. MUCH MORE INFO TO COME. DYNO RESULTS ARE GOING TO LISTED ON EVERY BBC ENGINE WE HAVE BUILT USING THIS CAM.
Please read the complete ad before purchasing this cam. If you’re not sure if this cam is correct for your application, feel free to give us a call for technical support 423-722-5152.
This product does not have any reviews yet.