......looks right where you want them to be.
Valve train experts
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
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From: Forked River NJ
Valve train experts
I just got my new heads and roller cam. Mocking it up my pushrod checker says I need to go .050 longer on the pushrods. They are already .150 longer than stock. Here are 4 pictures of how the rocker is rolling across the valve tip. It does not look to bad but a slightly longer pushrod would put it a little further out on the stem. Do you want it where it is or further out on the stem?
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I would say that you are splitting hairs. What happened to me is I went with .200 or .250 over and I ended up having to get the longer ARP rocker studs to have enough thread for the rocker locking nuts.
I would invest in a set of 16 lash caps for that valve stem size and call it good.
Oh ya, nice clear pictures!
I would invest in a set of 16 lash caps for that valve stem size and call it good.
Oh ya, nice clear pictures!
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
I would say that you are splitting hairs. What happened to me is I went with .200 or .250 over and I ended up having to get the longer ARP rocker studs to have enough thread for the rocker locking nuts.
I would invest in a set of 16 lash caps for that valve stem size and call it good.
Oh ya, nice clear pictures!
I would invest in a set of 16 lash caps for that valve stem size and call it good.
Oh ya, nice clear pictures!
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Just a tid bit of information. As your spring diameter gets to be near 1.55 diameter you can't get even get a thin wall socket on the head bolts between the springs.
Save yourself some aggravation and just go buy the ARP 12 point head stud kit and a deep 12 point socket that fits on them.
Race Director
Joined: Apr 2000
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I agree with 12 point solution. The pattern is fine, I don't even bother doing that I just use my eye and crank it over and watch the roller go across the tip. This of course should be done with motor out so you can see what is going on 
Race Director
Joined: Jan 2000
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From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
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Does the sweep get any narrower with shorter pushrods?
JIM
JIM
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Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
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From: Forked River NJ
I talked to AFR yesterday about lash caps. They are like buying cheap insurance. He was saying most that run solid rollers it is recomended but not necessary. Choice is up to me. It does provide a bigger area for the contact point and less chance of the valve tip mushrooming over. So for the 35 bucks or so I bought a set. I'll probably now need a new set of pushrods but I'll check it again when the caps arrive.
Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
I talked to AFR yesterday about lash caps. They are like buying cheap insurance. He was saying most that run solid rollers it is recomended but not necessary. Choice is up to me. It does provide a bigger area for the contact point and less chance of the valve tip mushrooming over. So for the 35 bucks or so I bought a set. I'll probably now need a new set of pushrods but I'll check it again when the caps arrive.
Le Mans Master
Joined: Nov 2008
Posts: 5,691
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From: columbus oh
Team Owner
Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Not all keepers are created equal. You have cheap stamped, hardened, and machined.........7 degree and 10 degree.
If you don't have space you can't use them.
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
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From: Forked River NJ
The keepers I ordered are right from AFR. I asked if they would fit and they assured me they are for the newer style 8mm valves and they would fit. I will post a picture when they arrive and are on the head. I asked about the pushrods and he said I might need new longer ones. They are .080 thick so I assume new ones will be needed.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I would tend to believe that they are .080 from top to bottom, but they are shaped like a cup. So the top might only add .040 or less to the stem height.
Smarter people epoxy magnets near the oil return holes or screen the oil returns. This summer a brand new engine broke some rocker arms and a lash cap ended up luckily in the bottom of the oil pan. We have since retrofitted every American V-8 with magnets
Smarter people epoxy magnets near the oil return holes or screen the oil returns. This summer a brand new engine broke some rocker arms and a lash cap ended up luckily in the bottom of the oil pan. We have since retrofitted every American V-8 with magnets
Burning Brakes
Joined: Feb 2005
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Lash Cap Dimensions
Pictured below are both the "standard" lash caps and the "shallow" ones.
These are Comp's "standard's" and Crower's "shallow's"!
Both are identical from the very top to the inside valve stem area, .080" thick!
The "standard's" are .210" tall from the topside to the bottom of the wall section, the "shallow's" are .145" tall from the topside to the bottom wall section!
Thanks, Gary in N.Y.
P.S. When using ANY lash-caps you must make certain that there's a "gap" between the lash cap itself and the valve locks, they must not make contact with the locks at all!
These are Comp's "standard's" and Crower's "shallow's"!
Both are identical from the very top to the inside valve stem area, .080" thick!
The "standard's" are .210" tall from the topside to the bottom of the wall section, the "shallow's" are .145" tall from the topside to the bottom wall section!
Thanks, Gary in N.Y.
P.S. When using ANY lash-caps you must make certain that there's a "gap" between the lash cap itself and the valve locks, they must not make contact with the locks at all!
Instructor
Joined: Sep 2005
Posts: 180
Likes: 1
I just installed lash caps on my LS6 and needed to go with longer push rods. My brother in law works for trend industries here in michigan, they make all of the comp and trick flow push rods, along with others. They engrave whatever name the customer wants on them. just google trend industries, they also own diamond pistons and make all of the harley davidson push rods and hendrick motorsports lifters (they are a work of art). I think they are cheaper than buying them from comp and have all the sizes you would ever need IN STOCK. If you are in michigan, you can walk right in and take them home. The only other ones to buy are from smith brothers
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
I just installed lash caps on my LS6 and needed to go with longer push rods. My brother in law works for trend industries here in michigan, they make all of the comp and trick flow push rods, along with others. They engrave whatever name the customer wants on them. just google trend industries, they also own diamond pistons and make all of the harley davidson push rods and hendrick motorsports lifters (they are a work of art). I think they are cheaper than buying them from comp and have all the sizes you would ever need IN STOCK. If you are in michigan, you can walk right in and take them home. The only other ones to buy are from smith brothers