Schubeck lifters

[Alan Roehrich]

The drag racing lifters are different from the NASCAR lifters, they were designed when we had ball and stud rockers and not roller rockers. I'm pretty sure I can get Trend to do something if necessary. We had bad problems with the PPPC stuff that was made the way an edge orifice Z-28 lifter is made, they had to be modified, or they'd starve the top end and fry it.

[nolongerracing]

So, the best way to "break in" a new cam for Trend lifters is to purchase a set of Smith lifters, "break in the cam" (Smith lifters require no break in) buy the Trend lifters, "break in the cam", and PRAY. If you have to pay the engine builder to do this on his dyno, looks like about a 2 grand waste of money.

[Larry Hill]

Just had a Schubeck junk my west coast swing engine. Same cam ,lifters, and stuff we have used for two or three years. Oil pan was full of ceramic and cam metal. I might be able to save rods and crank.


It might be time for roller lifters. Do any of the present cars, not copos, dragpaks, or C jets, have flat tappet lifters?

[Bruce Noland]

Larry I can feel your pain. I had two Schubecks crap out last year and a Smith lifter messed up my motor this year. Coated Precision tool steel lifters are the way to go. Talk to Chris at Comp.

[Jeff Teuton]

Just for information, I have a proposal into NHRA to allow aftermarket rollers in lieu of flat tappets. Why not try to get some folks to work on this. There has not been a flat tappet since the early 80's and I pointed that out along with only one manufacturer in the US. I know we squabble a bit, but those things are bad ancient unlike most of the old cars which are good ancient. Bruce, jump on that and get the troops to emailing CA and the Divisions. It's time for a change on that.

[V M Kauffman]

With all the problems that racers have had with the Schubeck lifters why does a lot of racers continue to use them? Their just asking for trouble! How many has Schubeck replaced?

[Greg Reimer 7376]

Originally Posted by Jeff Teuton

Just for information, I have a proposal into NHRA to allow aftermarket rollers in lieu of flat tappets. Why not try to get some folks to work on this. There has not been a flat tappet since the early 80's and I pointed that out along with only one manufacturer in the US. I know we squabble a bit, but those things are bad ancient unlike most of the old cars which are good ancient. Bruce, jump on that and get the troops to emailing CA and the Divisions. It's time for a change on that.

Basically, you would need a cam ground straight across the lobe for roller lifters,not tapered for flat tappet lifters, the rollers, the link bar, what about a rev kit to keep the rollers in the block in the event of pushrod or rocker failure?Sounds like a good answer to the recent problems that have surfaced. I feel that a rational,sensible appeal to the tech department with this proposal is in order. So many 305 and 350 blocks are machined for the factory roller set up already,as is the Dart block. Seems to make sense that an aftermarket design exists for the OEM earlier blocks as well.Meanwhile,converting from ceramic base to tool steel lifters sounds like a good way out.

Originally Posted by Jeff Teuton

Just for information, I have a proposal into NHRA to allow aftermarket rollers in lieu of flat tappets. Why not try to get some folks to work on this. There has not been a flat tappet since the early 80's and I pointed that out along with only one manufacturer in the US. I know we squabble a bit, but those things are bad ancient unlike most of the old cars which are good ancient. Bruce, jump on that and get the troops to emailing CA and the Divisions. It's time for a change on that.

Wow, that sounds radical. I can't wait to hear what a 396 375 sounds like at 10000 RPM.
Since we are On that path, I think we should open up the valvetrain to Titanium valves and retainers. Don't forget clamshells on the camshaft.

This is just asking to get out eleminatior merged into superstock. I'm not interested 2k in new valvetrain parts just to keep up. NO THANKS. If you keep breaking stuff, spend money and do some spintron testing. Or buy a new car, and you get all that already.

[nolongerracing]

Larry,
Did you have any other damage to your valvetrain? Broken rocker, damaged pushrod, loose adjuster?

Originally Posted by Larry Hill

Just had a Schubeck junk my west coast swing engine. Same cam ,lifters, and stuff we have used for two or three years. Oil pan was full of ceramic and cam metal. I might be able to save rods and crank.


It might be time for roller lifters. Do any of the present cars, not copos, dragpaks, or C jets, have flat tappet lifters?

[Mike Jones]

Originally Posted by Larry Hill

Just had a Schubeck junk my west coast swing engine. Same cam ,lifters, and stuff we have used for two or three years. Oil pan was full of ceramic and cam metal. I might be able to save rods and crank.


It might be time for roller lifters. Do any of the present cars, not copos, dragpaks, or C jets, have flat tappet lifters?

Re: "Live" from our sea to shining sea tour 2015



Broken Shubeck lifter!!
Took out a lot of stuff with it! Not fixable, might be able to save some pieces. Still haven't totally disassembled. Don't know yet if we will continue on with the trip with the pink Challenger. Should know by this afternoon.
Patsy



Reposted from another thread
Mike A114
P/SA

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