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Message: [QUOTE="Hotrodtractor, post: 89156, member: 25"] Play along and come to your own conclusion. :D So you need some more strength at higher RPMs in a boosted motor - generally that means you need to be looking at your valve springs - can your valve springs handle say 50-60psi of boost at say 4500 RPMs and probably 60-70psi of backpressure for a pulling application now? What kind of loading can the factory hydraulic lifters take before they collapse? Is it sufficient to be able to handle the valve springs and engine RPMs set forth in the first question? What is the benefit of running a hydraulic lifter in the first place? How does that apply to the engine that we are talking about? Is there any pitfall to converting the rockers to solid - other than the minute cost of the components and the fact you need to remove the heads to swap them? [/QUOTE]

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