12-08-2013, 07:20 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Quote:
Originally Posted by Tom Wells
mdross1,
Can't help wondering about solid rollers, bushed or needled. From what I can glean on the 'net (yeah, I know how reliable that can be) it seems idling is the solid roller killer, especially if the lift profile is aggressive from the start.
There are cams that have "softer" initial ramps, and cams that use tighter clearances that may help. Spending some phone money talking directly to Isky might save you some pain...
Most of the solid rollers I'm aware of are maintenance items; you run them 3000-5000 miles and then have them rebuilt. If you have low total miles to run the car it would seem more like a practical choice.
My hydraulic BBF rollers have gone 30K+ miles without the valve covers off. I do agree mine probably sounds tamer than a solid roller would 
Tom
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For any solid roller engine that will see a LOT of street time, I use a bushed lifter and that's about it. I use the Isky EZ Roll bushed lifters. They should go 25-30k miles before needing a rebuild. The lifters that are not pressure fed are the ones that will generally need replacement in the 3000-4000 mile interval.
As for cams, there are indeed lobes that are easier on the valvetrain than others. A larger major intensity (difference between advertised duration and .050" duration) is generally easier on the parts, and it also helps if you keep lift down. A tight lash cam is also easier.
All of my personal toys have solid rollers in them, but I enjoy hitting higher revs. |
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