help me understand

BooBoo

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My cam requires .030 longer pushrods . If I use a anti-pump up lifter then what difference would 030 make . Thanks . BooBoo
 

dave brode

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BooBoo,

Unless the lifter is taller, it will not help you. Fwiw - I would put it together and check it with stock pushrods.
That'll give you an idea if .030" longer will give you the proper pre-load. Imo, .030" -.040" is good.

Let's say, the stock pushrod allows for the pluger on the lifter to push in just .010". A .030" longer pushrod would give you .040" pre-load.

Hopefully, your valve tips lengths are all the same.....
Dave



link=topic=1154.msg11658#msg11658 date=1113163958]
My cam requires .030 longer pushrods . If I use a anti-pump up lifter then what difference would 030 make . Thanks . BooBoo
 

BooBoo

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Dave . The stock pushrods would be too short . cam is small base circle needing longer push rods . Non adj valve train . Wouldnt the anti-pump lifters give the wrong preload ?
 
A

Anonymous

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.020-.030 is all the preload you would want
Get an adjustable pushrod ,measure and get the proper length

TI
 

smalltruckbigcid

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summit sells the crane brand for $25.99 max length is 9.8 inches, part number crn99730-2
George
 

dave brode

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BooBoo,


link=topic=1154.msg11664#msg11664 date=1113172828]
Dave . The stock pushrods would be too short . cam is small base circle needing longer push rods . Non adj valve train .

Understood, but don't assume the .030". Check it out first [like JW said too]. I meant that you could use the stock pushrod to determine how much longer you need. An adjustable one would be best, I admit [for checking].

< Wouldnt the anti-pump lifters give the wrong preload ?

Again, "anti pump-up" has nothing to do [nessesarily] with the length of the lifter. A longer or shorter effective length on the lifter would effect pre-load, just like base circle and pushrod length would [and a few other things.].
Dave

 
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