[BigNorm]

I understand that I can pass on taking off the top end if I just cut the stock push rods in half and replace them with the adjustables. But if I plan on taking the heads off anyway to replace the head gasket and have them reworked why do some cams say that adjustable push rods are required? Thank you for your enlightening comments.

 

[immo2896]

I'm no expert by any means but here goes. The way I look at it, is the stock non adjustable has a small chance to be the right length. All it would take is the base size of the cam to be different from the stock one, and the pushrod is too long/short. Head gasket thickness could be different, or what if the heads have been shaved a little to clean them up. These 3 variables would make me want to have peace of mind that my valves are adjusted properly.

 

[Hullhorr]

In addion to the above, adjustable pushrods will let you precisely set the proper preload on the lifters which I would recommend replacing if doing cams. Some lifters require more preload than others.

 

[Desertwndrr]

Adjustable pushrods are NOT required and many people prefer to run the solids. You will want to verify length if you are going to a thinner head gasket and/or a cam with a smaller base circle, but you can run the solids assuming that things check out.

 

[BigNorm]

Thanks for your help. It seems obvious now but for a while I couldn't grasp it. I do plan on installing a thinner head gasket so adjustables will be necessary. Thank you for your help. How do you adjust preload? I know you don't want to totally collapse the lifter.

 

[Hullhorr]

How do you adjust preload? I know you don't want to totally collapse the lifter.

The instructions that come with the lifters will tell you. Pay attention to the "threads per inch" of the pushrods you buy. You tube or Fuel Moto's website has videos on installing the adjustables. It's not hard.

 

[rg113]

When a cam maker requires adjustable's it's because the base circle of the cam(s) are different from stock.
Good advice on replacing lifters by Hullhorr. S&S are very good IME.

 

[BigNorm]

Thanks for the info.

 

[Smarty]

They do make perfect fit pushrods for all applications. Adjustable aren't the only answer. Adjustables are nice when you are not sure what cams you may like and change from time to time. Both do the job required.

 

[Spazz]

Another quick note for insight.. NOT ALL adjustable pushrods can be installed by merely cutting out the solids.... I'm doing the research on this and found some adjustables you can do it this way and others you can't... it depends on the design of the adjustables.

 

[ironmark]

Adjustable pushrods are the best way to go and there isn't any need to get the expensive ones any adjustable pushrod will work just fine. I use the harley adjustable pushrods and they work just fine.

 

[rg113]

Another quick note for insight.. NOT ALL adjustable pushrods can be installed by merely cutting out the solids.... I'm doing the research on this and found some adjustables you can do it this way and others you can't... it depends on the design of the adjustables.

Agree. You'd want the "quickee" variety.

 

[Smarty]

totally agree on this one,i like the S&S quickies,but the SE p/rods are fine for most milder builds (BTW,the "perfect fit" p/rods are a oxymoron,there is no such theing as a "perfect fit" solid p/rod unless their actually made for your exact motor)

Unless I mis read here, I believe with were talking about hydraulic lifters and there are plenty of perfect fit pushrods for these applications. Do I use them, no. I prefer SE adjustable, but none the less they are available. Any knowledgeable engine builder knows how to measure and order these.

 

[rg113]

Kirby, you ever a ball end come apart? I like the idea of you making your own.

 

[Sleepybagger]

I've had solids cut out and also had solids removed intact by unbolting the lifter blocks. I swear by adjustable pushrods even run them on my nailhead Buicks. If the rocker doesn't adjust the pushrod should.

To each is own on THIS subject:nerd:

 

[rg113]

no,I sent them to be pressed in with a .003 interfit,have allways made them for gas & nitro drag bikes too,never had one come out.

Thank You.

 

[dozer23]

So if I were to use a bolt in cam say a Drago 565 of 580 0.30 head gasket new S&S lifters.do I need adjustable or will existing (stock)rods work?

 

[Smarty]

So if I were to use a bolt in cam say a Drago 565 of 580 0.30 head gasket new S&S lifters.do I need adjustable or will existing (stock)rods work?

With the Andrews 57H stock pushrods worked fine. Contact Drago about the base circle size or just ask them if it is a bolt in cam. I'm not familiar with this particular cam.