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Pushrods... Overall size or wall thickneas?

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Old Jan 2, 2020 | 04:22 PM
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Default Pushrods... Overall size or wall thickneas?

So.. What is more important for valvetrain stability, larger pushrod size or thicker wall size?

For example, 11/32 pushrod with .120 wall vs 3/8 pushrod with .08 wall.
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Old Jan 2, 2020 | 04:28 PM
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Diameter is king. 11/32 x 080 is far stiffer than 5/16 x 120.

In your example 3/8 x 080 is far stiffer
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Old Jan 2, 2020 | 04:35 PM
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Originally Posted by Darth_V8r
Diameter is king. 11/32 x 080 is far stiffer than 5/16 x 120.

In your example 3/8 x 080 is far stiffer
Will 3/8 pushrods fit MMS 220 heads? Manton has some 3/8 x .145 pushrods.
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Old Jan 2, 2020 | 04:38 PM
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No I had to run 11/32 on mine. But I had zero issues. Only 650 lift and no crazy springs so no big deal. On my 428 I run 3/8
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Old Jan 2, 2020 | 10:57 PM
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Manton 302. 11/32 x .120?
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Old Jan 3, 2020 | 07:36 AM
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Originally Posted by FCar2000TA
Manton 302. 11/32 x .120?
I think that is exactly what I ran on my mamo 200 build...
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Old Jan 3, 2020 | 09:35 AM
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Try a double taper.
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