Schubek Lifters

[carl hinkson]

Originally Posted by brent flynn

Im considering some Smith Machine Composite lifters... Ive read all the bad stuff about them, and its got me wondering... Is everybody just over revving their engines? Or, are these things not as good as they claim to be? I cant imagine, that, revving to 6500-6700, and having 180-200lbs on the seat(not the driver's seat..hehe), there wouldnt be any problems... My other question, at this point, is, are they worth it? Is a regular lifter, with EDM , a good way to go?

Been there done that with composite lifters, Identical engines some lifters have lived and some didn't and the ones that didn't made a mess in the engine.

Since then I have gone to the Tool steel lifters and no problems so far.

[brent flynn]

Originally Posted by carl hinkson

Been there done that with composite lifters, Identical engines some lifters have lived and some didn't and the ones that didn't made a mess in the engine.

Since then I have gone to the Tool steel lifters and no problems so far.

Can you use tool steel lifters on a cast iron cam, with no problems? Are spring pressures the same as composite? EDM hole?

[carl hinkson]

Originally Posted by brent flynn

Can you use tool steel lifters on a cast iron cam, with no problems? Are spring pressures the same as composite? EDM hole?

Same spring pressures you would run with a cast iron lifter. The tool steel lifters you can send back and have them resurfaced for around 100 dollars.

Tool steel lifters on a cast cam core is not a problem.

I have used some with a EDM hole and some with out and have not seen any difference.

[Reed Granrt]

DLC coatings are a lot like oil. There are as many different kinds as there is oil. These coatings are still in their embryoinc stages. There is coatings made for low pressure loads, high pressure loads, vapor load , non vapor loads and yep you guess it what ever you want to talk about. You talk about NASCAR. Ya cant even compare the 2. Those guys want to finish one race with as little spring pressure as you can get by with. Everything in that motor is so finely tunes, that if you pass gas near one of them and it ingest it, something will burn up cause they didnt git to test it that way. That unlimited money is to git it light and keep it together. There are good DLC companies and then there are just coating companies. So dont lump them all together and say the coating dont work. Friction coefficient can be as low as .04 and hardness can be as hard as
3500Hv. Crap now ya got me started.
reed

[George Mirza]

Originally Posted by brent flynn

Can you use tool steel lifters on a cast iron cam, with no problems? Are spring pressures the same as composite? EDM hole?

There was a good thread about the tool steel lifters on hear a few months ago. Might want to try a search and see what comes up. I like what I read about them, and they are much more affortable than the Smiths.