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09-11-2015, 01:33 PM | #31 |
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Re: Schubeck lifters
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.
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10-17-2015, 06:29 PM | #32 |
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Re: Schubeck lifters
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? Last edited by Larry Hill; 10-17-2015 at 06:36 PM. |
10-17-2015, 08:29 PM | #33 |
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Re: Schubeck lifters
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.
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Bruce Noland 1788 STK |
10-18-2015, 08:47 AM | #34 |
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Re: Schubeck lifters
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.
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Jeff Teuton 4022 STK |
10-18-2015, 10:41 AM | #35 |
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Re: Schubeck lifters
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?
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10-18-2015, 11:08 AM | #36 | |
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Re: Schubeck lifters
Larry,
Did you have any other damage to your valvetrain? Broken rocker, damaged pushrod, loose adjuster? Quote:
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10-18-2015, 11:29 AM | #37 | |
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Re: Schubeck lifters
Quote:
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10-18-2015, 12:26 PM | #38 |
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Re: Schubeck lifters
I ask NHRA to make roller lifters an option 3 years ago, no response.
Just the cost and availability makes it a no brainer. Maybe if more racers send emails something will happen. |
10-18-2015, 01:03 PM | #39 |
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Re: Schubeck lifters
Not if I know Drag Racers! Next you'll see more wiped and broken cams, valve and valvetrain and spring failures. Availability maybe. Cost? Bull.
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Billy Nees 1188 STK, SS I'm OK..........it's everybody else. |
10-18-2015, 01:09 PM | #40 |
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Re: Schubeck lifters
If the ceramic foot lifter always stays in contact with the cam the lobe, then the ceramic foot is a lot less likely to shatter. Issue (as far as I'm concerned) is that the optimal performing stocker camshaft will incorporate some amount of loft (cam/lifter separation for increased dynamic lift) incorporated into the design, therefore I'd only consider a steel/DLC coated flat lifter for a stocker application. Some of you may even be lofting and don't know it, or might find out when you have a failure.
In addition to the Precision steel lifters mentioned, I've used the Ferrea lightweight steel SBC flat lifters with the foots polished, successfully in a 8200 rpm SBC on a nitrided cam core. |
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