ZDDP ADDITIVES
QUESTION'About "ZDDP" additive for 'flat tappet Triumph engines.Are they useful?
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The question is: Do you use FLAT tappets or are your tappets slightly domed? If they are domed ZDDP won't help. If they are perfect flat just use quality oil and they will last.
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I believe that ZDDP will help with any sliding friction, but especially where point or line contact occurs. Most tappets are not in fact flat, but have a slight crown (large radius). This creates a...
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clshore wrote: Most tappets are not in fact flat, but have a slight crown (large radius). Unfortunatly true and from my opinion the cause of all the cam trouble Triumph cars has to face. This creates...
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If the cam is ground with a taper accross the face, the lifters will still rotate. But in such cases, there will likely be point contact, with high unit pressures. Depending on the relative widths of...
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I agree with you that there are some lifter/cam constructions that use crowned lifters and tapered cam lobes...Ford for example. But when I had several times worn lifters I asked why, and after...
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Great pictures Christian! Thanks for posting them, I won't argue with results. Ceramic faced lifters are available (Titanium Nitride I believe) and would solve a number of issues, but they are $$$$$....
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Hi Carter, thanks! I made the picture because the issue came up one or two year ago and I posted it on my web page with this photos:...
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Can anyone give me an addresss for the purchase of the ceramic lifters. I have several inquiries for thse. Nice to know the price is possible. Thanks.
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These were available as solid ceramic lifters for Volkswagen engines for a while, but the vendor (Schubeck) apparently decided to 'go it alone'. Were apparently used with success in some SCCA racing...
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