Good reading here.Pages 1-9


http://toplineauto.com/wp-content/up...on-Catalog.pdf

 

Used Harley B lifters and also GM lifters in my 2002 Twin Cam for years with no issues. I use Larry's Johnson lifters now also with great results in the TC and am installing same in my M8 this winter with cam upgrade.

 

Well this one cuts through all the advertising and hype. Great input. If my OE "B" are damaged or excessively worn, I can rest easy with what ever is selected from HLJ. Now it's time to decide to keep the S&S Quickies or use them for skeet shooting practice. I got them at a fairly good price 205.00 maybe they were selling at that price for a reason??? Or maybe just NOS,, Thanks for the site reference. That makes for good reading. Seems they were used in my 95 F150 too. Maybe that's why at over 220k the toy hauler runs smooth as a baby's butt

 

Lots of S&S quickies out there running without any issues.

 

Do not try and modify the SnS Quickie pushrods. The problem comes from the way they had to reduce the size to allow the nut to float up and down for the "Quickie" feature they claim. As far as I know, anyone selling a "Quickie" feature are just relabeled SnS pushrods, so I would not try it on any of them! The hole at the end of the pushrod looks fine but that hole is reduced as it get to the area where the material had to be removed to allow the nuts to slide up and down. The OEM pushrods have ~ 0.093" diameter hole all the way through the pushrod and the SnS "Quickie" units are reduced down to ~ 0.050" a little longer than the area where the OD was reduced for the nut to slide around. Opening that area up is just going to make it weaker, in that area where it is already weak to begin with. For a stock or mild cam engine they seem to be OK but I would never use them in a High Lift, heavy valve spring pressure application.

 

So that would go directly against what their lifter video tries to claim, and that is just what I have an issue with. If reducing the Oil Flow to the heads through ~0.050" hole is good enough in an SnS "Quickie" pushrod, making the hole that feeds the pushrod anything over the same ~ 0.050" from the lifter isn't going to help any either! The stock lifter and the GM lifter are both larger than ~ 0.050" hole in the "Quickie" pushrods.

 

Steve,

I'm always willing to learn, and I trust in your experience... but I'm a little confused by the connection you draw between the S&S tappet video and a comparison of the size of the oil holes between the S&S quickie pushrods and chevy lifters...??


I just watched the S&S tappet video again and all they talk about are the flow rates between the S&S Premium lifters (I know they are no longer made) vs the chevy lifters...


Now they are certainly making this video to push their lifters, and they make a couple of "cheeky" comments to try to exaggerate their point... but the video times the oil flow between the heads, of the same engine, same oil, same oil temperature, same oil pressure but with two different lifters between the heads. It shows two distinctly different flow rates to and through the rockers in the video.......

They don't mention anything about the size of the holes in any lifters or even discuss their quickie pushrods...?

They mention the difference between oil pressures in a Chevy V8 vs a Harley engine (true) and the difference of recommended oil viscosities (true) as a possible basis for differences in the lifter designs... They are claiming that each lifter is designed for a different application, and that is causing the flow difference...

I have taken apart a lifter before, mostly out of curiosity, and it would seem to me that there are several things internal to a lifter that can affect oil flow, besides the oil port size at the pushrod, such as the piston size (volume) and internal passages effects on the pressure passing through the lifter body...

With any pushrod, the oil port size is pretty much the only "restriction" in that part...

I would love to know/understand your reasons for believing this video to be a misrepresentation of the two lifters oil flow rates.... and how you connected the S&S pushrods to this experiment, and conclude they are restrictive...??

I'm not trying to defend the video, nor dispute your experience.... I am just trying to learn from your experience, and understand your conclusions...

 

I guess you missed the part where I told everyone that we disassembled the SnS premium lifter and measured it all and compared it to the GM part. ALL measurements were the same within 0.0001" except the exit hole that feeds the oil out of the lifter to the pushrod. That hole and the plate below it control the oil flow out of the lifter and into the pushrod. The pushrod then carries the oil through the middle, up to the rocker assembly which feeds the rest of the head. So anything in that path can be the restriction point to limit the Oil FLOW to the heads. Now there misleading claim is that the lifter, they no longer sell, supply's more oil to the heads and that the heads need it. Then they make some BS comments about selling head parts to scare the viewer into believing it's necessary. So if you want to buy into the claim that the lifter is better because it supply's more oil to the head, that clearly means you cannot restrict the flow to less than the lifter provides an not expect damage to the cylinder head assembly, from lack of oil. Since the SnS "Quickie" pushrod reduces the oil flow to the heads due to the restriction in its passageway, it there for stands to reason that the heads will be damaged if you believe the BS in the video. The exit (feed) hole in the GM lifter is larger in size than the restriction in the SnS "Quickie" pushrod and the exit (feed) hole in the SnS premium lifter is larger in size than the restriction in the SnS "Quickie" pushrod, now the pushrod itself becomes the limiting factor here. The OEM stock pushrod has a passageway size of ~ 0.096" and the SnS "Quickie" pushrod comes in at ~ 0.051" that's OVER a 45% reduction from Stock! So by installing the SnS "Quickie" pushrods versus the stock pushrod you will reduce the oil flow to the head, its just a straight simple Fact, due to the restriction built into the SnS pushrod.

Now there are many HD engines running the SnS "Quickie" pushrods and many others who have stuck their name and rebrand the SnS pushrod selling it out there today. How many are failing, I have no idea, but if your going to believe the SnS lifter video, that the additional oil flow is required, then you must also except that the SnS "Quickie" pushrods will cause your engine to fail due to the reduced oil Flow to the heads that they cause!

 

So Steve, are there ANY adjustable pushrods out there that you've come across that don't have the restriction that the S&S Quickie pushrods have? Something that won't restrict the flow from a decent lifter?

 

I'm kind of an "old dog" when it comes to adjustable pushrods. I like to use ones that maintain at least the same oil flow rate as the OEM pushrods have, and are stiff enough not to flex, if were using larger cams and heavy valve springs in the engine. Now whether or not more oil flow is necessary I do not know for sure, but I know I do not want to reduce it any. With that said, your going to have to look around and see what's out there but I just keep using the HD Taper Premium pushrods as they meet those requirements. I'm not a big fan of the nuts they come with but I have replacements nuts I've found to fix that issue with them. In some of our Race Team engines we've even had custom pushrods made as I could not find what I felt was necessary for this application. They cost more, but what doesn't when your looking for quality parts!