I have just installed a pair of Woods TW-555 Cams, Woods Directional Lifters and Fuel Moto Adjustable pushrods.

My question is how much preload should I put on the Adjustable pushrods? The instructions that came with the Fuel Moto Pushrods state 19 flats for the preload. The instructions that cam with the Woods TW-555 Cams (Andrews Products, Inc. instructions) state 21-24 flats.

When I installed the pushrods into my 07 Ultra I used 19 flats and I am getting a very loud ticking sound in my rear head. The front seems quiet.

I am thinking that I should increase the preload to 24 flats. I think that there might be a gap between the pushrod and the rocker arm.

I tried calling Fuel Moto but their answering machine stated that they were closed today and they were attending a trade show.

Any help would be appreciated.

Thanks,

Scott

 

We are Woods largest dealer.
Been doing business with him since the mid-nineties.
We have found that loading the lifter .140-.150" deep, works very well.
Scott

 

I don't get that??? dumb questions.. what is "Flats" when i put my adj rods in it was a number of turns... Enquiring minds. BTW my motor is so much quieter with the SE adjutable pushrods it's enjoyable. The guy from Andrews told me the tansikon on the posh rod was determined by the pushrod MFG and not the Cam MFG. I learn something everyday so i keep an open mind

 

The pushrod has a hex (six sided) base where one can adjust with a wrench, either 1/2 inch or 7/16 depending on the pushrod. The sides of the base are sometimes referred to as flats.

So turning a pushrod six flats is the same as one full turn.

Jim

 

OK, that makes sense...thanks.

 

One full turn = .xxxx" pre load, depending on the thread pitch (TPI) of the pushrod adjustor. You can do the math or..............

TPI Flats Preload Per Turn Per Flat
24 15 .1042" .0417" .0069"
28 17 .1011" .0357" .0059"
32 18 .0937" .0313" .0052"
36 21 .0965" .0275" .0045"
40 24 .100" .025" .0042"
52 30 .0962" .0192" .0032"

So, depending in PR TPI, calculate the number of turns required to set preload at .100" to .120"; or follow Scott's recommendation of .140"-.150" with Woods cams.

 

Thanks for explaining...

 

so when using a 32tpi pushrod how many turns would you need to get .140-.150 preload?
would that be 4 turns?

 

anyone have these cams installed and using a zippers tm system?

 

No. 4.5-4.8 turns; see #6.