Morel 5520 solid roller lifters

These are sold as a street performance mechanical roller lifter.

I was running Comp 936's and they seemed to work fine, but seeing that I like to do things like Drag Week, that full body lifter really looks appealing as does their price of course.

Anyone familiar with their limitations?  The wheel is smaller in diameter by 0.05", but they offer no other qualifying specs.

The cam is a 0.697" lift 260/270 @ 0.050"

No one?

For Drag week or any other endurance application I would certainly not be using any manufacturers cheapest lifter.
I also believe these ones have a 0.700" roller as opposed to the 0.750" roller.
260/270 @ 0.050" isn't really a baby camshaft either.

Just my opinion. How many $$ is the engine worth?

I have a brand new set of theses lifters in the original box in my garage. Been in there for a few years now. I was planning on using them in my spare engine. But I have a set of rebuilt comps for the one now.

I was hoping to find a little more info on themas well. I'd be willing to sell you my set if your interested. If I was gonna do a drag week. I'd feel a lot better starting off with a fresh set

I have no interest in any low cost roller lifters.
I have Crower Hippo lifters now, and the next set will be the Needle less type.

The bushing lifters have has failures in DW cars as well.

I have had Comps before that spread at the wheel. They never failed, but the full body on these sure looks appealing from a durability standpoint.

You are right about that the full body is structurally more sound. I dont like the smaller wheel.

BigBlockRanger wrote:The bushing lifters have has failures in DW cars as well.

I have had Comps before that spread at the wheel. They never failed, but the full body on these sure looks appealing from a durability standpoint.

You seem to have all the answers regarding solid roller lifters. Why ask for input then?

I don't have all the answers, but I certainly do a lot of research and have done Drag Week 3 times.

Just reporting my observations in regards to the solid bushing lifters. They can still fail, and while they have no needles to come out, if the cam is munched, you still have to deal with all the metal that was ground off of it.

I started this thread really to see what application these lifters were made for. Their site really offer no qualifying data except for 'Street Performance', which can mean a variety of things depending upon whom you ask.

I sent Chris Straub an email in hopes of getting an answer.

Awesome, you have more extended street use than I have.

I still stand by my original comment - I would not use any manufacturers cheapest lifter offering for an endurance application.
The materials used in low cost lifters are not the same as the higher end stuff.

It will be interesting to hear what C. Straub says.

Cheers

I think that the choice of cam lobe will be one of the largest factors when it comes to lifter/valvetrain durability in this sort of application. Using some sort of quick action/drag lobe is asking for a failure. Use something that can get by with less than 200lbs seat and 500lbs open load and I think you'll find that most lifters will have little difficulty surviving a lot of run time.

Chris emailed me back and said those are for very very mild street roller cams and that they should not be used with my existing camshaft.


Dave, its really amazing some of the stuff guys bring to Drag Week in regards to camshafts, mainly in the n/a classes. My cam would definitely be considered small compared to many of them!

There are a few guys running solid flat cams that are in the same range your running... It might live on DW I myself am running a SFC not the size your using but has been trouble free 258* 258* .615 .615

BigBlockRanger wrote:Chris emailed me back and said those are for very very mild street roller cams and that they should not be used with my existing camshaft.


Dave, its really amazing some of the stuff guys bring to Drag Week in regards to camshafts, mainly in the n/a classes.   My cam would definitely be considered small compared to many of them!  

Did Chris say what the limitations on the lifters are? I was under the impression that they were just as good as comp lifters. But then again I did just loose a brand new comp lifter on the dyno.

No he did not. He just said:

"No sir that is way too much cam for those lifters. The are designed for
the mildest of solid roller stuff. You will need to run a 5456 Ultra Pro...... They are for very MILD cams!!!"

BigBlockRanger wrote:Chris emailed me back and said those are for very very mild street roller cams and that they should not be used with my existing camshaft.


Dave, its really amazing some of the stuff guys bring to Drag Week in regards to camshafts, mainly in the n/a classes.   My cam would definitely be considered small compared to many of them!  

I don't feel that the "size" of the cam duration wise makes any difference in longevity. I'm talking about how radical the lobe design is dynamically. How high are the accelerations and the resulting pressure angles against the lifters? How much spring spring rate is required to give adequate valvetrain control. All of this stuff has to be very tame to get good valvetrain life in this sort of application. What is very interesting too is how little torque and horsepower if any is really sacrificed in order to have the valvetrain last much longer and not fail.

With that said anything can break....