Shubecks new RollerX lifters, they have the axle delete RPO

Sounds like a crazy good idea to me.

whoops, thought i put in a hyper.

lifters

 

Where is racerdude when you need him?

I want to see them run a while before I throw them in something but they are interesting.

Bret

 

I second the motion.I heard somewhere[am i a fountain of specifics or what?] that drag guys loved em and were getting even wilder with cam timing, but street apps were running into minor issues of some type[a fountain.....] Hopefully someone here can clarify? This was during R&D though, before he released them for sale on his website.

 

ok, let me play devils advocate for a moment..

Lets say you get these and throw into your new max boogie stroker motor. Your out there making pass after pass and making good power, when suddenly you lose oil pressure because of a spun bearing. CRAP! Well, you KNOW your looking at a little work to fix it (clean the crank, new bearings, maybe new caps, etc..), BUT since you decided to use these new gee whiz rollers that rely on oil pressure to live, you are now going to have to add buying a new billet roller cam and another set of lifters (at almost a 1K!).

No thanks. Don't think this is the sort of thing we need to even consider. Last time I checked we were'nt building 600+ inch mountain motors and spinning them to the moon. Maybe pro-stock would like to take this chance, but not your average sportsman racer..

My view from the peanut gallery...

Dave C.

 

so i was just on there side, i see some engines, but i thought it was blown up picture then i saw the "904" i seriously jumped back from screen. that is awesome!
as far as this goes, i wonder how long it took them just to adjust the pressure inside of the lifter.

 

I am here. Mine are still in the box,Doing mini tubs at the present time.Home made from flat metal--lots of time,lots.
I will keep you up to date about them.

 

If you spin a brg the engine has got to come down anyway and the rollers on a regular set will give up from no pressure. If you hurt the motor it's just more money.

77,
That's not how they work,you don't adjust anything on the lifter. The basic thing they do is eliminate a busted roller,which is all to common.

 

CCC...I think even if you spin a bearing, you arent going to lose 100% of your pressure so you will maintain a certain amount of oil to the lifters still, and if the motor is shutting down, like it should be if you spin a bearing in a race, there would be enough oil film left to protect the roller from damage. And if you spin a bearing on the street, probably not too often do you lose much pressure at all, maybe half??? Which is probably enough to maintain a film between there.

Im sure they thought of this stuff as well.

I think he might have been speaking in terms of how much flow/pressure they allow into the face of the roller, since that would change how far off the roller sits from the face of the lifter I would imagine. If they were to allow all 150psi of some oiling systems to push on the roller it might sit too far off the lifter and bounce. MAYBE, just thinking out loud of what 77 was talking about.

jon

 

With the composit,space age material,these are made of I don't think there will be any damage to the lifter and the cam damage would not be any more than with regular brg roller's.If a brg roller busted a roller it is goodby cam.You would get a few thousands more valve lash with the Shubeck's is all.

Time will tell and I didn't spend the extra money to have them break,Soooo after a few street miles with a very high rocker ratio and stout spring pressure we will see.

 

What kind of pushrods will you be using?

 

3/8 x ? moly from Crower.

 

yes, that is what i was refering to

 

Not a problem with these.

 

racerdude,

You weighed these lifters? I'd like to know how the weigh in against a solid lifter like the aluminum-top isky.

BTW, I have a feeling you could really use a taper push rod. Are these Crowers straight wall?


Well, here's the thing.... most classes do not allow the use of Schubeck lifters. Where they are popular is in those hydraulic flat tappet classes. Tough to find a decent hydraulic lifter these days.... Schubeck builds a "special" lifter that is real popular. Not to make a short story long or anything but it's crazy when you think about it. These hydraulic classes were set up to keep racing costs down, yet to be competetive, you spend a good deal of money on modified hyd. lifters when a rule change... "solid flat tappet".... for instance, would eliminate all that nonsense.

Anyhow, most classes aren't allowing any kind of ceramic or composite lifter so Schubeck get's the boot from the big boy motorsports.

I like the idea behind the "radius" lifter a little better but it requires a special Schubeck camshaft to go with it....

-Mindgame

 

[QUOTE=Mindgame]racerdude,

You weighed these lifters? I'd like to know how the weigh in against a solid lifter like the aluminum-top isky.

BTW, I have a feeling you could really use a taper push rod. Are these Crowers straight wall?

No,my ancient scale won't go that low. They are about half the weight of Crower's and they are 1.00 in dia instead of .874.(just a guess).Just say a bunch lighter.
I had originally intended to run a 7/16 tapered to 3/8 on both ends,but don't have the room.I had to machine the bottom inside of the intake flange and the valve side of that opening to clear the 3/8. That rocker ratio thing.
Yes the Crower's will be straight or I could find somebody that makes a 5/16 to a 3/8 taper but that don't EVEN sound right.I think the 3/8 will get it done,not running but upper 600's on spring pressure.