[HWYSTR455]

Originally Posted by STEELCITYFIREBIRD

You got three options... as I see it;
1-Listen to the noise (not me)
2-Get oil everywhere, adjust running (only when all else fails)
3-Run valves once again,
* use/have no tools on polylock while finding zero lash, eliminates any
possible interference
* use correct method (links below) to place lifter on base circle of cam
* determine how much travel/turn on polylock from opening valve to zero lash
and split that for your set point from zero lash, or bottomed (bottomed up is easier and more precise) a third method is with a feeler gauge/plunger bottomed but I won't go there


https://www.hotrod.com/articles/comp...aulic-lifters/

https://www.jesel.com/instructions (btw/I cut and paste a partial post from here to save me time while @ work!)

Time to !

That's funny Hot Rod says they got that info from Comp, because if you look at my original post, as well as the snip in my last post, you will see that is from Comps' printed adjustment procedures.

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[STEELCITYFIREBIRD]

Originally Posted by HWYSTR455

That's funny Hot Rod says they got that info from Comp, because if you look at my original post, as well as the snip in my last post, you will see that is from Comps' printed adjustment procedures.

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http://www.cpgnation.com/forum/threa...justment.1937/

"Next, we’ll adjust the exhaust valves. To do so, you need to turn the engine over until the intake pushrod moves all the way up. Rotate just past maximum lift, where the intake will begin to close. The lifter is now at the base circle, and the exhaust valve can be adjusted. Note: DO NOT go too far down (over halfway) past the point of maximum lift. If you go too far, you will be in the overlap cycle – where intake valve lash is being taken up as the exhaust valve begins to open"

Anyhow, that's how I do them, solid or hydraulic lifters.


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[pastry_chef]

Originally Posted by STEELCITYFIREBIRD

Note: DO NOT go too far down (over halfway) past the point of maximum lift. If you go too far, you will be in the overlap cycle – where intake valve lash is being taken up as the exhaust valve begins to open"

If the intake lobe is closing you are not even close to the exhaust lobe ramp.

Sounds like you are skipping over most of the compression stroke and power stroke in your mind.

I can provide EXACT ramp numbers on any Comp lobe if desired.

[HWYSTR455]

Originally Posted by STEELCITYFIREBIRD

http://www.cpgnation.com/forum/threa...justment.1937/

"Next, we’ll adjust the exhaust valves. To do so, you need to turn the engine over until the intake pushrod moves all the way up. Rotate just past maximum lift, where the intake will begin to close. The lifter is now at the base circle, and the exhaust valve can be adjusted. Note: DO NOT go too far down (over halfway) past the point of maximum lift. If you go too far, you will be in the overlap cycle – where intake valve lash is being taken up as the exhaust valve begins to open"

Anyhow, that's how I do them, solid or hydraulic lifters.


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Probably is fine, as long as it's after the full open, but pretty sure the overlap is somewhere at the beginning of the intake valve opening. Immediately after the closing of the intake valve is a compression stroke. My understanding is that the overlap is at the beginning of the intake valve opening. Like I said, I grabbed that info from comps' site, with the URL to the doc, but no sense beating this horse.

On the poly locks, you make the adjustment after you've reached zero preload as usual, such as a 1/2 turn, then back off like a 1/16-1/8 of a turn snug the set screw down, then crank back to the original position of the adjustment, hold the allen wrench and move both the wrench and allen wrench at the same time.

Some cam profiles slope the closing of a valve off slowly at the end, and can hold the valve open briefly at say .100-.200 lift, and that can be easily mistaken for the base circle of the lobe. That's why you use valve events to determine the base circle.

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[TAQuest]

Originally Posted by HWYSTR455

Probably is fine, as long as it's after the full open, but pretty sure the overlap is somewhere at the beginning of the intake valve opening. Immediately after the closing of the intake valve is a compression stroke. My understanding is that the overlap is at the beginning of the intake valve opening. Like I said, I grabbed that info from comps' site, with the URL to the doc, but no sense beating this horse.

On the poly locks, you make the adjustment after you've reached zero preload as usual, such as a 1/2 turn, then back off like a 1/16-1/8 of a turn snug the set screw down, then crank back to the original position of the adjustment, hold the allen wrench and move both the wrench and allen wrench at the same time.

Some cam profiles slope the closing of a valve off slowly at the end, and can hold the valve open briefly at say .100-.200 lift, and that can be easily mistaken for the base circle of the lobe. That's why you use valve events to determine the base circle.

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Not sure about you but I find it hard to miss the base circle. Not that tricky. Wouldn't want someone to think it's harder than it is. That could make the job harder rather than easier. The instructions that came with the cam made it easy. I posted them word for word and they work.