tappet adjustment

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Apr 21, 2017 | 05:06 PM

row jimmie

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From: Kansas

tappet adjustment

Near as I can tell my pushrod are 24 threads per inch. I came up with 2 and a half turns adjustment. Any thoughts?

Apr 21, 2017 | 05:09 PM

row jimmie

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1996 80 inch

Apr 21, 2017 | 06:41 PM

glidein wide

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From: ct

0.140" from zero lash is considered the goal.

Apr 22, 2017 | 06:38 AM

row jimmie

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Thanks, I thought the goal .100, u like them longer because. I've been called a troll so I hope I don't offend by asking.

Apr 22, 2017 | 07:13 AM

daven9113

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If you are not sure what brand PRs you have, then make sure you count how many threads in one inch you have to be safe. Adjusting them longer than .100 will reduce valve train noise.

Apr 22, 2017 | 07:29 AM

glidein wide

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From: ct

Quote:

Originally Posted by row jimmie

Thanks, I thought the goal .100, u like them longer because. I've been called a troll so I hope I don't offend by asking.

The 0.140" came from the professionals..here are my notes..(s&s adjustable rods, 32 TPI). I've tried these settings , 0.1352" , 0.1456" , 0.1612" , 0.1404".....ev27 cam still makes for a noisy top end at all of these settings, I blame it on the crap screaming eagle lifters I bought.

Apr 22, 2017 | 08:21 AM

98hotrodfatboy

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From: Poolville

Quote:

Originally Posted by glidein wide

The 0.140" came from the professionals..here are my notes..(s&s adjustable rods, 32 TPI). I've tried these settings , 0.1352" , 0.1456" , 0.1612" , 0.1404".....ev27 cam still makes for a noisy top end at all of these settings, I blame it on the crap screaming eagle lifters I bought.

Don't even know who makes them for HD. That's the scary part....

Yea 24 Tpi=20 flats=.138"

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Apr 23, 2017 | 08:34 AM

1997bagger

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From: Ohio

Quote:

Originally Posted by 98hotrodfatboy

[/B]

Don't even know who makes them for HD. That's the scary part....

Yea 24 Tpi=20 flats=.138"

They are Jim's, HD started to try to unload them because they were overpriced and sat on the shelves.

.100 is the factory lifter setting, this depth will work for 80% of aftermarket cams. Woods, Redshift, EV27 has "square" lobes that shocks the Evo push rod system. A Evo cylinder and head can grow .030 with heat expansion, a sqaure lobe cam can expose the changed lifter when it goes to the looser side depth by clatter. The deeper plunger setting in the lifter covers the expansion plus taming the noise created by the race profile cam