Solid roller on the street?

Portagee

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I’m surprised nobody has mentioned this but with a non-bushed lifter bore you’ll want a roller lifter with a “shrouded” roller so as not to expose the oil galley at full lift. Such as Crane 66542’s

That's an interesting point too - any idea how much lift is too much for a non-bushed lifter bore? Having trouble filtering lifters by whether or not they're shrouded...
 

Stanton

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That's an interesting point too - any idea how much lift is too much for a non-bushed lifter bore? Having trouble filtering lifters by whether or not they're shrouded...

.600 will expose the galley with unshrouded wheels
 

68 HEMI GTS

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I run .450 lobe lift with 829’s in an unbushed 400 block. You’re probably not going to run anything more than that on for a streetcar.. unless your like me.. lol
 

pushrod

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I have a 512 stroker from 440 source with an Isky .600 solid roller, Isky solid roller lifters, with .300 lift intake and exhaust, Harland sharp rockers and aluminum heads on the street with no problem but tires
 

Backrd.Junkyard

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The springs are a pretty close match to what Comp calls for. If anything, Comp’s spring pressures are usually on the light side. Wallace Racing has a spring rate calculator that can be used for a ballpark figure. I like where your heads have titanium retainers to offset the extra spring mass. I’ve not studied much on the subject yet, but there are some who state that there can be concerns with resonant frequencies when increasing valve train mass and spring pressures with solid roller cams. I don’t think it’s a problem until you get more into the more radical profiles, but if anyone has anything to add on the subject, I’m all ears. I do like the Harland Sharp rockers, too. I’ve known of more than one set holding up in solid roller service.
Max Lift: 0.63
Installed Height: 1.85
Coil Bind Height: 1.16
O.D. of Outer: 1.553
I.D. of Inner: 0.74
I.D. of Outer: 1.14
Spring Style: Dual
Spring Rate: 439
Seat Pressure: 158
Damper: Yes
Max Lift:
0.63
Installed Height: 1.85
Coil Bind Height: 1.16
O.D. of Outer: 1.553
I.D. of Inner: 0.74
I.D. of Outer: 1.14
Spring Style: Dual
Spring Rate: 439
Seat Pressure: 158
Damper: Yes
 

Stanton

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Taking into account factory tolerance, is there any way to reasonably check if unshrouded lifters expose the oil galleries with the .550 (.367 lobe) lift cam?

Well ... I suppose you could pull a lifter and using a ruler, vernier or something like that, measure from the top of a lobe to the bottom of the oil galley (should be visible enough with some light in there). Then measure from the bottom of a roller to the top of the roller opening. If the opening is higher than the bottom of the galley then you have a problem.

You'd easily identify a shrouded lifter because they generally only shroud the block side.
 

Geoff 2

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I used Comp bushed sol roller lifters last year in a 440. Under $1000.
Both I & a friend have been using Isky bushed lifters for many years now, no problems; he races his car. I do not use needle roller lifters or alum rockers.

My BS meter pegged the needle in the red zone at post #24. That the bronze bush 'heats' up with prolonged street use. Since all the surrounding metal is at the same temp & the roller is expanding as well, I do not see how it causes a problem.....
 

68 HEMI GTS

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I used Comp bushed sol roller lifters last year in a 440. Under $1000.
Both I & a friend have been using Isky bushed lifters for many years now, no problems; he races his car. I do not use needle roller lifters or alum rockers.

My BS meter pegged the needle in the red zone at post #24. That the bronze bush 'heats' up with prolonged street use. Since all the surrounding metal is at the same temp & the roller is expanding as well, I do not see how it causes a problem.....

I bought a very expensive set of crowers for my hemi that are bushed. Plan is to run the hell out of them on the street. They were the best thing I could find for a 650# over the nose cam. They do oil the bushing. So yeah I’m with ya.

19C010B0-CA32-4E96-833C-72077577825F.jpeg
 

Stanton

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My BS meter pegged the needle in the red zone at post #24. That the bronze bush 'heats' up with prolonged street use. Since all the surrounding metal is at the same temp & the roller is expanding as well, I do not see how it causes a problem.....

Typo. Meant to say BEAT. Has been corrected.
 

Stanton

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I bought a very expensive set of crowers for my hemi that are bushed. Plan is to run the hell out of them on the street. They were the best thing I could find for a 650# over the nose cam. They do oil the bushing. So yeah I’m with ya.

Can you show the back side of those. I'd like to see if the roller is shrouded or not.
 

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