Engine Rocker arm

M

mercurycapri

Member

May 30, 2006

211

2

18

washington

Nov 30, 2023

#1

• Nov 30, 2023

• #1

I'm a decent mechanic but I lack knowledge when it comes to valvetrain. I installed aluminum heads onto my 351, Windsor. I'm checking for push rod length and with this angle of the rocker arm I get the best sweep on the valve stem. The rocker arm looks like its at a bad angle and I'm worried that it will put stress on the push rods. What do you thnk? Is it ok?

 

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M

Monkeybutt2000

Mustang Master

Aug 11, 2019

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Lafayette,IN

Nov 30, 2023

#2

• Nov 30, 2023

• #2

Seems to me the sweep mark is not in the center of the valve stem.

 

Mcmahst

5 Year Member

Jan 19, 2021

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Laguna Woods CA, fort Mohave AZ

Nov 30, 2023

#3

• Nov 30, 2023

• #3

Can you post the pic of the top of the valve you are referring to that has a good sweep wipe? And when I say wipe, the pattern you get after painting Dykem blue on the top of the stem, let the rocker go through a full wipe.

 

Bullitt347

I have been doing it wrong this whole time

15 Year Member

Mar 23, 2007

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Nov 30, 2023

#4

• Nov 30, 2023

• #4

mercurycapri said:

I'm a decent mechanic but I lack knowledge when it comes to valvetrain. I installed aluminum heads onto my 351, Windsor. I'm checking for push rod length and with this angle of the rocker arm I get the best sweep on the valve stem. The rocker arm looks like its at a bad angle and I'm worried that it will put stress on the push rods. What do you thnk? Is it ok?

Click to expand...

It depends on the rpm range of the engine. The higher the rpm, the more critical the valvetrain set up is.
If this is a DD that does not see the high side of 5K, just run it. You may (or may not) see some adverse wear issues after 100K miles.
If this is seeing higher than 6K rpm, then spend the time and money to get it right.
There is HP to be had with proper valvetrain components and set up at high rpm's.

 

nickyb

I gotta say i never painted my nuts, Never Ever

15 Year Member

Apr 3, 2009

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Nov 30, 2023

#5

• Nov 30, 2023

• #5

im no expert just a half fast mechanic and looks to me you need longer push rods.

 

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M

mercurycapri

Member

May 30, 2006

211

2

18

washington

Nov 30, 2023

#6

• Nov 30, 2023

• #6

Here’s what I’m getting.

 

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Mcmahst

5 Year Member

Jan 19, 2021

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Laguna Woods CA, fort Mohave AZ

Nov 30, 2023

#7

• Nov 30, 2023

• #7

Looks pretty good. I agree with the RPM limits.

 

M

Monkeybutt2000

Mustang Master

Aug 11, 2019

1,387

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Lafayette,IN

Dec 1, 2023

#8

• Dec 1, 2023

• #8

Mcmahst said:

Looks pretty good. I agree with the RPM limits.

Click to expand...

That looks terrible.

 

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M

Monkeybutt2000

Mustang Master

Aug 11, 2019

1,387

848

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Lafayette,IN

Dec 1, 2023

#9

• Dec 1, 2023

• #9

Look for a sweep similar to this

 

90sickfox

Wasn't a pretty sight...and I've got big hands

SN Certified Technician

Mar 2, 2015

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Dec 1, 2023

#10

• Dec 1, 2023

• #10

Push rod is too short.

 

Reactions: limp and mercurycapri

nickyb

I gotta say i never painted my nuts, Never Ever

15 Year Member

Apr 3, 2009

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Dec 2, 2023

#11

• Dec 2, 2023

• #11

thats what i said

 

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Y

Yoyoda

Member

Mar 4, 2014

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Ontario Canada

Dec 10, 2023

#12

• Dec 10, 2023

• #12

Are they Flotek heads? I had a set on a previous build that I could not get a centered or narrow sweep unless I had freakishly long (or short, my memory fails me) pushrods. I ended up replacing them with some AFR’s.

 

M

mercurycapri

Member

May 30, 2006

211

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washington

Dec 15, 2023

#13

• Dec 15, 2023

• #13

Yeah its Flotek heads