[AG]

Originally Posted by gtofreek

Got ya covered!

I'm elongating the block oil hole on yours to reach the oil band of the lifter. This is the best fix, as the lifter mod can only go so high before it pokes out the top of the lifter bore, so on smaller base circles, you can't cut the notch high enough. With the block mod, base circle doesn't matter, as long as the oil band doesn't drop below the lifter bore. The engine I started this thread over, I can't do that since the engine is together and running.

How far are you elongating the block hole down? Are you making a groove with a small file or something like that?

[HWYSTR455]

AG - Thanks for the comparison, that looks to me that the band is correct, or am I missing something? Do the Cranes ship with the cut in the body?

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[HWYSTR455]

Originally Posted by gtofreek

What's important to note of is if the oil hole in the block will line up with the oil band in the lifter, when the lifter is on the base circle. I can't remember how Olds is, but Pontiac just has a 1/4" hole, closer to the top, than the bottom. Because of this, the band drops below the hole at base circle. This is the critical time the lifter needs to refill itself. If the Olds oil hole lines up with the oil band at base circle, you're golden!

Somehow I missed this post!

Ok, so it's better to mod the block than the lifter, correct?

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[AG]

Originally Posted by HWYSTR455

AG - Thanks for the comparison, that looks to me that the band is correct, or am I missing something? Do the Cranes ship with the cut in the body?

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The Crane lifters come like that from Crane already cut. They look like the oil band is in the correct location like a stock Pontiac and not a Chevy lifter.

[Formulajones]

Originally Posted by gtofreek

Just got done machining a 421 for darbikrash, and he is running a solid flat tappet cam that was nitrided. Running the Hylift/Johnson solid lifters with the EDM hole in them.

Neat, that's what I just did with a DZ build (nitride and using solid flat tappets with EDM hole)

[HWYSTR455]

Dang inbox was full, had to clean it up some...

So maybe it's worth spending the extra for the Crane HYD roller lifters?

I'd like to see a Morel, Comp S, and Crane next to each other, if any have the ability to do that...

.

[craigs69]

Originally Posted by dataway

Does anyone run plain, no roller, solid lifters anymore?

My only experience with them has been on old motorcycles .... they make some noise, and need adjustment now and then, but they tend to be pretty bullet proof, rarely seen one fail.

Is there a reason they are not commonly used on hot rods these days?

I'm running a Lunati solid flat tappet cam in my 469.

243/251 @ .05 with .569/.582 lift. The valve train noise is minimal and it runs like a scared rabbit. 3,500 miles and no issues.

[Formulajones]

Most of the modern solid grinds today run pretty tight lash (.014-.018) from the ones I've used and seen, so they really don't make all that much noise anymore like they did back in the day when we would run .030" for instance.

[gtofreek]

Originally Posted by HWYSTR455

Somehow I missed this post!

Ok, so it's better to mod the block than the lifter, correct?

.

Yes.

[gtofreek]

Originally Posted by AG

Here is a pic of a Crane HR lifter, the lower oil band is the same height as a hydraulic Pontiaxc lifter. The side pic shows the machining similar to what LSM did.

That oil band is not at the right height either. The top of the oil band is still lower than the stock Pontiac lifter. The cut that was made to raise the oil band a little is not in line with the oil hole in the block, so it doesn't do much good.

Where's a pic of what LSM did?

[craigs69]

Originally Posted by Formulajones

Most of the modern solid grinds today run pretty tight lash (.014-.018) from the ones I've used and seen, so they really don't make all that much noise anymore like they did back in the day when we would run .030" for instance.

Mine calls for .022" intake and .024" exhaust. I set both .002" tighter.

[AG]

Originally Posted by gtofreek

That oil band is not at the right height either. The top of the oil band is still lower than the stock Pontiac lifter. The cut that was made to raise the oil band a little is not in line with the oil hole in the block, so it doesn't do much good.

Where's a pic of what LSM did?

I meant the maching you did. I'll check the oil hole alignment on the base circle and at full lift when I install them and modify the oil hole in the block if necessary.

[AG]

Originally Posted by gtofreek

That oil band is not at the right height either. The top of the oil band is still lower than the stock Pontiac lifter. The cut that was made to raise the oil band a little is not in line with the oil hole in the block, so it doesn't do much good.

Where's a pic of what LSM did?

The bottom of the oil band lines up with a stock lifter and the top of the small machined part lines up with the top of the oil band in the stock lifter, might not be obvious from the pic.

[gtofreek]

Originally Posted by AG

The bottom of the oil band lines up with a stock lifter and the top of the small machined part lines up with the top of the oil band in the stock lifter, might not be obvious from the pic.

I get that, but the cut upwards is not in line with the oil hole in the block, so it is still edge orifice oiling on the base circle. That cut upwards needs to be inline with the oil hole to be effective enough to provide the needed volume of oil during the very short time the lifter sits on the base circle. The top of the oil band is what's important, as long as the bottom side doesn't come out of the bottom of the lifter bore.

[AG]

I will have to think about getting the proper location machined to line up with the oil hole then. I don't want any issues with these after I install them.

[gtofreek]

Lower the oil hole in the block, if the block is not assembled yet.

[AG]

Just make a channel (~0.040" deep?) leading from the oil hole in the block down about a 1/4 inch?

[77 TRASHCAN]

Originally Posted by gtofreek

Yes.

I'd rather modify the lifter, easier to work on, than get a carbide bit chattering in a lifter bore, then having to deal with THAT...

[gtobob67]

Paul, what tooling process did you use to add those slots in the lifters?

[JLMounce]

The gist is that hydraulic roller lifters aren't correct for a factory Pontiac block without modifying the block or lifters. It seams at the very least this can cause excessive noise and likely not achieve the level of performance that one would expect. At the worst it could damage the lifters lifter bores or both.