measuring for proper push rod length
Thread Starter
Instructor
Joined: Sep 2008
Posts: 192
Likes: 1
From: Ashton
measuring for proper push rod length
just finish checking for proper push rod length! These are my numbers,
Push rods.............."Preload"
8.000..................... 0.30
8.050..................... 0.45
8.100..................... 0.80
8.150..................... 1.28
Thinking of going with the 8.050 push rods,0.45 PL???
New ETP 215 Heads, Street Sweeper cam 612 600 gross lift!
Push rods.............."Preload"
8.000..................... 0.30
8.050..................... 0.45
8.100..................... 0.80
8.150..................... 1.28
Thinking of going with the 8.050 push rods,0.45 PL???
New ETP 215 Heads, Street Sweeper cam 612 600 gross lift!
Drifting
Joined: Jan 2008
Posts: 1,722
Likes: 138
From: Florida
St. Jude Donor '09
just finish checking for proper push rod length! These are my numbers,
Push rods.............."Preload"
8.000..................... 0.30
8.050..................... 0.45
8.100..................... 0.80
8.150..................... 1.28
Thinking of going with the 8.050 push rods,0.45 PL???
New ETP 215 Heads, Street Sweeper cam 612 600 gross lift!
Push rods.............."Preload"
8.000..................... 0.30
8.050..................... 0.45
8.100..................... 0.80
8.150..................... 1.28
Thinking of going with the 8.050 push rods,0.45 PL???
New ETP 215 Heads, Street Sweeper cam 612 600 gross lift!
The lower the amount of pre-load is, the greater the propensity for lifter leak down overnight. The amount of lifter pre-load should be about 50% of the lifter plunger travel.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Two recommendations. First, consider a larger diameter pushrod. If 3/8" will fit, use it. Second, if you get custom pushrods from Manton you can order any length you want and obtain any preload you want as a result.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
What they are referring to is that the lifter internals from zero movement of the pushrod cup to maximum travel (bottoming) is on the order of 0.145" (approximately from memory). Your measured preloads exceed the maximum travel of the lifter internal capability by a large margin. Can you describe how you measured and the tool being used?
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