Re: Billet cams and lifter supply
I still run the old Isky cams that I got from them in the
80s and 90s and actual Hydraulic Schubecks from 20 = years ago. Some same old valve springs 165 seat and some beehives on a couple cars. Never a problem I still can run 1+ under (Some of our cars even well more) when I want it too. Engines in a couple cars are 8 plus years of regular racing. Plus with just only one valve job. I am sure I am a tenth or two behind the curve of the top dogs. However, I am not spending a lot of money to race and I still win more heads up than I lose. NO valve train issues. |
Re: Billet cams and lifter supply
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If the EPA is the problem than making the parts outside the USA would fix it. How many vehicles today run OHC on bucket setups? Which is nothing more then the cam against a flat tappet Stan |
Re: Billet cams and lifter supply
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The issue is that there is only one solid/hydraulic lifter manufacturer left in the USA. The only other manufacturer left in the USA, makes only hydraulic roller lifters. New engines are either hydraulic rollers or OHC. The business model for earlier engines that run a hydraulic or solid tappet style is no longer a market the bean counters want to support with USA made products. Moreover, there is both an issue with cam core quality and lifter quality, especially when they are made overseas. Then add the EPA imposed restrictions on lubricating engine oils, it creates more issues. As regards to camshaft design, running a roller lifter/camshaft does not always allow a performance increase since the roller wheel diameter places a limit on how aggressive the lobe can be. One example would be the Olds 307 engine, which was available with both a hydraulic tappet and roller lifter. In Stock Eliminator trim, the hydraulic tappet engine, even with solid tappet lifters, is faster than the roller engine. Since you been around as long as I have, you may remember in the early days, there were "Mushroom" style solid lifters available to run aggressive lobe profiles because it provides a larger contact area. If there were to be a rule change to allow the use of hydraulic or solid roller lifters, then they should limit the roller wheel size to OEM which is 0.700". This is the roller wheel size for all OEM applications. Allowing a larger roller wheel diameter has the same effect as using a larger size tappet style lifter. With roller lifters, the diameter does not make any difference, however, the roller wheel diameter does. |
Re: Billet cams and lifter supply
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I'll stand by what I've said, REAL RACERS will FIND the parts that they need. And if they can't find the parts then maybe it's time for them to start building newer combos. |
Re: Billet cams and lifter supply
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looking back,I should have sent back to be checked... |
Re: Billet cams and lifter supply
I'd like to hear more from Glenn Briglio on this subject.
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Re: Billet cams and lifter supply
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Let leave 4v DOHC out of this and just look at 2v Single OHC. While there is no rocker arm or pushrod the bucket replaces the lifter and is traveling at valve velocity / acceleration while the lifter would be traveling slower. Stan |
Re: Billet cams and lifter supply
But the oil can "puddle" on the top flat area of the "lifter", how long do you think it could last upside down?
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Re: Billet cams and lifter supply
Finally, just received my new coated PPPC lifters.
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Re: Billet cams and lifter supply
Just curious Mike ,asking for a friend, how much did the get for coated lifters. DLC?
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Re: Billet cams and lifter supply
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Re: Billet cams and lifter supply
In the early-mid 1980's I worked for the Los Angeles County Mechanical Department, and the cars the Sheriff's department had were '77-78 Novas, 79-83 Chevy Malibus, and they had Chevy trucks and vans.Other County departments had various Chevy and Dodge trucks as well. Around 1981-82,we had an absolute epidemic of flat camshafts in all those various engines, predominantly the 305 Chevys,not too much with the Dodges. We tried various things, but it still was a very common experience. We were searching for an answer, tried various brands of lifters and oils, but the issue continued almost unabated. Along about the early 90's the steel roller cam with hydraulic roller lifters came out, and the problem vanished. At the time, that was when the zinc additive disappeared from the various brands of oils and that was when all this started. Now, the issues we are being confronted with probably more than anything else are supply problems. It's maddening to be told that the goods you ordered for a thousand or more dollars are back ordered because the vendor doesn't want to lose the sale so he takes your money and tosses your order at the bottom of the pile.Not a good way to ensure repeat business, but I guess the modern business culture doesn't care about that.
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Re: Billet cams and lifter supply
I used to work on a Pro Stock team using Jenkins power. He told me that his main criteria for oil was a high zinc level.
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