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Old 12-11-2010, 01:47 PM
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Solid roller for GM

If you have a non-roller GM block, I know that you need special retrofit lifters if you want to go hyd roller. Is that also true of solid rollers? Or are solid rollers short enough that you don't need the retrofit style?

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Old 12-11-2010, 02:20 PM
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A solid roller lifter for your block is all you need. No need for a retrofit lifter, Mike
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Old 12-11-2010, 03:01 PM
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The difference between a factory roller lifter and an aftermarket one is the bar that prevents them from turning. And the height, which isn't such a big deal. I am not sure if anyone makes solid roller to accept the factory dog bone retainers.
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Old 12-11-2010, 04:10 PM
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Quote:
Originally Posted by curtis73
If you have a non-roller GM block, I know that you need special retrofit lifters if you want to go hyd roller. Is that also true of solid rollers? Or are solid rollers short enough that you don't need the retrofit style?
I'm not sure what you're trying to determine, but solid aftermarket rollers are very tall, just like hydraulic aftermarket rollers.

The factory dogbone is a double-D design, like on a steering shaft, so I doubt that any of the cam manufacturers will replicate the flat sides on the lifter body to accept them.
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Old 12-11-2010, 09:30 PM
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I run Isky RedZone solid rollers in a Gen I block, with an Isky bar. No machine work.
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Old 12-12-2010, 08:13 PM
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Thanks for the replies so far. I'll go a bit further into detail

With hyd rollers in an older block, you need the retrofit because the overall package of factory hyd rollers is too tall. The room GM used for the roller and the hyd piston was compensated for with the taller lifter bores. I was thinking, a solid roller doesn't need all that room for the hyd part, so I was thinking solid rollers could/would fit in an older block without popping the oil groove out of the bore.

My concern is this: I'm building a rather hairy caddy 500 stroker right now. I'm on the edge of where I could get away with hyd lifters or go solid. So, my choices (as I see them) are flat hyd, flat solid, or (if you don't need expensive retrofit lifters) solid roller. As long as I'm on the fence about hyd or solid, I wanted to know more about solid rollers since that might sway my decision greatly.

I am aware of the dogbones vs. tie bar and I'm not too concerned. This caddy will have no real feasible way of bolting in a retainer plate, so the dogbones are not really a good option.

I'm blowing the better part of my wad (nearly $3000) on heads so trimming the hemorrhaging arteries is always a bonus.

Many people don't know that its not just the tie bar/dog bone issue, its that factory roller lifters use a taller oil groove since the bore is taller. Putting factory rollers in a non roller block will cause the lifter to come up out of the bore far enough to expose that groove, as seen in this photo. The tie bar lifters are retrofit hyd rollers, and the one on the right is a factory lifter. Note how much taller the groove is on the factory lifter.

I haven't heard any reliablility issues with using the tie bars instead of the dog bones, has anyone else?

I've just never built very much that was a higher RPM motor (and I pick a caddy 500 as my first try ). Anything that I needed to rev just got solid flats. My issue with doing that on this engine is that the heads can accept massive lifts and I can't possibly imagine sleeping well at night running flat lifters on a cam with the ramp speeds I'm going to need for this setup.

So, key points... 1) no experience with solid rollers, 2) very little experience with solids at all, and 3) potential for huge lifts and 6500-7000 rpm.



And here is a photo of the valvesprings I'll be using. (just checking to see if you're still awake.)


Last edited by curtis73; 12-12-2010 at 08:31 PM.
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Old 12-12-2010, 09:46 PM
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i was going to run the same valve spring but I was concerned with hood clearance. I was also having a hard time trying to track down 16 of them.
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Old 12-12-2010, 09:53 PM
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The aftermarket solid rollers are made to fit in the same lifter bore the original flat tappet lifter was in, the oil band is in the factory location and often narrower and won't get exposed at high lift. With solid rollers there is more concern about the base circle of the cam getting too small and allowing the roller lifter to expose the oil band on the underside, but that is generally just a concern on SBC's with the cam tunnel so close to the crank and having to use small base circle cams with 3.75" or more stroke. With the Cad BB you don't have that to worry about.
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Old 12-13-2010, 10:20 AM
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Ok, that's what I needed to know. Thanks y'all.

Now I'm off to saving my pennies for the heads
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