If you havent bought yet, get the 2126

 

With the axle oiling hole. So are you saying the lubrication to the roller is the limiting factor on the seat pressure? Or are you saying the short travel is better suited? I already bought the 2116 and was trying to get it closer to coil bind on the PAC 1209x which got me to 200 on the seat. Was wondering if anyone had problems running it at 200 seat?

 

The 2126 with the axle oil are the lifter that are recommended by Johnson for over 500 lb

If you are worried about it

 

There is a short travel and a full travel version of the 2126 and the 2116

 

I found this an interesting read . I saw this on Top Line , Johnson Hylift site .

Always ran short travel lifters on my engine until just recently . Finally went solid , Im holding on to the 2116s incase I go back .

Never even thought of or heard this before ........




Short Travel Lifters function like mechanical lifters but they are much harder on the valve train components. These were developed because the standard hydraulic lifters couldnt handle the higher spring pressures used in performance engines. These are usually made with a spacer to reduce the piston’s travel so the amount of valve lift loss is kept to a minimum. A mechanical lifter is installed with a small amount of lash to take up thermal growth in the valve train. This lash is taken up when the lifter starts up the cam lobe. There is no pressure being translated from the valve springs through the push rod at this point. This is a smooth transition to remove the lash before the valve starts to open. With the short travel lifter these are made to have no lash initially but they end up collapsing during the opening of the valve. The difference between these two is that when the short travel lifter collapses it is while there is a significant load from the valve spring translated down the push rod. This load is usually when the valve is almost completely open where the most pressure is on the lifter. When the lifter collapses it is bottoming out with a very heavy load on the piston. This acts like a hammer hitting the lifter and will send a shock wave to the mating Camshaft lobe’s surface. This shock load is detrimental to the mating surfaces and even worst when a roller lifter is being used. Tests have shown that these short travel lifters will reduce roller bearing life by as much as 70%.

 

Thanks that is interesting. What was the most pressure you ran on your 2116?

 

175 on the seat , cant remember off hand the open pressure . Johnson says 185/535 max spring pressure I believe .

 

Hey guys, since this thread has kinda turned into a hydraulic roller lifter thread I will add this. Most (not all depends on ramp design) hydraulic roller cams can be run with solid roller lifters. In the past there have obviously been reliability issues in engines that see a lot of runtime especially if its a somewhat bargin priced lifter. Generally the mechanical roller lifters are lighter and should be able to rpm more cleanly/higher on the same lobes. The failure point is due to the lifter tapping on the needles every revolution as it takes up the lash on the ramps. Bushings have seen pretty good success but in all but the most expensive lifters the bushing material has been a point of wear which in turn they need to be rebuilt, not a huge deal. About 30yrs ago we ran "rev kits" on the needle bearing lifters and basically stopped all the failures from needle bearing tapping. Now we have the end all lifters available due to advancements in plasma coating technology. There is now a all but indestructible lifter that uses a DLC coated bushing that is pressure oiled and have so far have proven to have zero wear issues. The bushing is actually pressed on the axle and the larger od is what the wheel actually rotates on so the actual bearing surface is several times the area of other bushing style lifters. I can be very competitive with pricing against the higher end hydraulic roller lifters. There is also the advantage of having offset pushrod cups to have better valvetrain alignment in many applications, something that is not possible with the hydraulic lifters. No BS here and I won't try to say they are "MY LIFTERS" like others have done on these forums. They are made by BAM lifters which worked for Crane for many years in this same area. He only sells to engine builders but I will be happy to quote pricing to anyone that wants to PM me on here or send an email to the address in my signature below. Great thread, lets keep it going.