exhaust or lifter noise ?

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01-01-2020, 11:54 AM

#11

vipergtrdj

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Quote:

Originally Posted by madmann26

You would hear sewing machine type noise if the pushrods aren’t long enough.

Steve Frost said eons ok that in order for cam makers to cut a lift over .600, they have to cut the base circle smaller, hence the longer pushrod.

My old Comp LSR cam was over .600 and I used 7.450 pushrods before the sewing machine noise went away.

I drove it 40k hard miles without any issues.

Food for thought.

so measured and got 7.37" with no preload, then with .080 preload comes to 7.45". So I'd say need longer push rods. Is 0 080 good for preload? That's all I've found online.

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01-01-2020, 03:17 PM

#12

madmann26

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That sounds right.

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01-08-2020, 01:40 PM

#13

vipergtrdj

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Quote:

Originally Posted by madmann26

That sounds right.

Put the new pushrods in, still very little ticking but its about normal from what it was. Its a lot less then with the shorter pushrods. Also noticed oil pressure is more responsive, not sure if that's in relation to pushrods or not.

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