Anyone ever use this cam.
11-11-2018 | 09:53 PM
#1
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From: NW Michigan
11-12-2018 | 08:03 AM
#3
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From: Reno, NV
They make these for the larger hydraulic cams. They are supposed to be for long high rpm applications. I tried a set on my .632 in lift cam and they were pretty loud for hydraulic.
https://www.summitracing.com/nv/part...make/chevrolet
https://www.summitracing.com/nv/part...make/chevrolet
11-12-2018 | 09:31 PM
#4
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From: NW Michigan
Just wondered if anyone has ran it. If I ever were to use it I'd have In a custom billet with tight lash solid rollers. I don't use hydraulic lifters but like the ease on the valvetrain with hydraulic lobe.
11-13-2018 | 10:50 AM
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From: chicago
Hydraulic lobes with solid lifters can be harder on the valvetrain than a solid lobe. Hydraulic lobes have very fast opening and closing ramps. The hydraulic lifter is what takes the shock out of this. A solid roller cam, has lash ramps that can gently open and close the valve. You want to open the valve quickly and set it down gently ideally.
I would talk with a camshaft engineer on that topic.
also, you can have a .680 lift cam, that has easier lobes than .650 lift cam. Depends on the duration numbers. Shorter the duration, the faster the lifter needs to travel to hit max lift. Longer durations allow more time for lifter to hit max lift, therefore a shallower ramp exists.
I would talk with a camshaft engineer on that topic.
also, you can have a .680 lift cam, that has easier lobes than .650 lift cam. Depends on the duration numbers. Shorter the duration, the faster the lifter needs to travel to hit max lift. Longer durations allow more time for lifter to hit max lift, therefore a shallower ramp exists.
11-13-2018 | 10:59 AM
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From: chicago
There is no advantage to running mechanical roller lifters on a hydr roller cam. You will get the same longevity and power by running mechanical roller lifters on a mild mechanical roller cam.
The only reason some people have issues running mechanical roller lifters on the street, is because they're running lobe profiles that are not designed for longevity. You don't run a drag racing profile that's designed to keep the valvetrain together for 20 1/4 mile runs, in a circle track engine that needs to run 700 miles between rebuilds, and you don't run a circle track profile that's designed for 700 miles, in a street engine that needs to go 60,000 miles between rebuilds.
In most cases, if you want the same amount of durability/reliability, the hydraulic roller will make just as much power below 6,500rpm(approx). If you're not going to turn it more then that, you can make more with a mechanical roller, but it will cost you some durability/reliability.
Mike Jones
Jones Cam Designs
The only reason some people have issues running mechanical roller lifters on the street, is because they're running lobe profiles that are not designed for longevity. You don't run a drag racing profile that's designed to keep the valvetrain together for 20 1/4 mile runs, in a circle track engine that needs to run 700 miles between rebuilds, and you don't run a circle track profile that's designed for 700 miles, in a street engine that needs to go 60,000 miles between rebuilds.
In most cases, if you want the same amount of durability/reliability, the hydraulic roller will make just as much power below 6,500rpm(approx). If you're not going to turn it more then that, you can make more with a mechanical roller, but it will cost you some durability/reliability.
Mike Jones
Jones Cam Designs
