Pushrod measurements 440

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Skeeter007

Skeeter007

Skeeter007
Joined
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Location
Barrie Ontario Canada
This is taken from my build page
Slow build 71 Scamp 440

I didn’t get any hits there so a new thread it is.

Pushrod measurement.

I’m not quite sure how to accomplish this but took a rookie stab at it after watching numerous videos.

I used the comp cam measurement tool.

With the tool installed I bolted down the rockers. Not torqued. I then made sure that lifter was bottomed out. I then spun the tool up to ball of lifter and had the cup secured to the ball with minimal thread exposed. I then rotated the engine to see how it looked. These lifters weren’t soaked so when I rotated the engine the pushrod tool did sink into the lifter. I brought the lifter to zero lift and took the measurement. The pushrod at zero lift was not diving into the lifter.
Zero wall clearance issues

Measurement 9” 1/8


Once I feel confident that this is the ballpark of what I need I’ll order from Smith Brothers.

Two measurements taken
First with 1.5 threads exposed
Second with 2 exposed 9” 1/8

I’ll do it again and use a proper measuring tool.

Smith Brothers says I’m on the right path.

Thoughts?

Links to equipment

Mancini 1.5 rockers
Mancini Racing Aluminum Roller Rocker Arm Kit

Sidewinder heads with comp hardware
mopartsracing - Sidewinder Cylinder Heads For Big Block Mopar

Comp Cams
Photo added

Howard’s lifters “from Summit Racing”Howards Cams 91712 Howards Cams Max Effort Hydraulic Lifters | Summit Racing

IMG_1379.jpeg



Brandon
Follow the build here …..Slow build 71 Scamp 440
 
I like to generally see 1 to 1 1/2 thread below the rocker.

All the adjusters I use have a recessed area in the adjuster
and that needs to line up with the oiling in rockers,

If the pushrod is too long or short the rockers can't oil and
that will burn up the top end in short order!
 
Mine were almost 10" (9.90) long on trickflows 240's with a geometry correction kit from Mike @ b3 racing engines and Harland Sharp rockers.
 
The correct setting for the adjustment, per Chrysler is 9/32 protrusion, plus .050 minus .000.

Now I need to go look it up because I’m not sure I have the plus and minus correct.

If you set it at 9/32 you can’t go wrong.
 
Newbomb Turk said:
The correct setting for the adjustment, per Chrysler is 9/32 protrusion, plus .050 minus .000.

Now I need to go look it up because I’m not sure I have the plus and minus correct.

If you set it at 9/32 you can’t go wrong.
Click to expand...
I’m still a rookie here. How is that measure 9/32’s what tool? Thanks
 
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