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Aug 21, 2019 | 01:42 PM

#11

Steve Cole

HD EFI Guru

Joined: Jan 2008

Posts: 4,453

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Quote:

Originally Posted by steves86ta

This is the kind of information i was looking for. I hadn't made my mind up yet on lifters, just stated that i have a pretty decent set of extras from a few engines ive built over the years. Latest being a twin turbo 5.3 that is not coming off the dyno until it puts out 1250+ hp...

I agree... one of the things ive done with SBC's in the past and also with my latest LS build is to use restricted pushrods to limit top end oiling... If the inner diameter of the "quickee" pushrods really are .051" then what does it matter... I need to measure the comp and crane lifters i have as well they may have a larger orifice.

The only thing i can really foresee being an issue might be plunger travel and pre-load. Maybe its just me but im not sold on this whole "adjustable" pushrod thing either... What kind of spring pressures do these engines run?

Spring pressures vary on the OEM engines but the CVO 110 have the highest pressures stock. Some of the aftermarket springs are much greater than the CVO 110 used. So the answer is going to be based on the year and engine your working with. For the record on the lifter deal, there are only 2 Hydraulic lifter manufactures left in the USA, everyone buys from one of the two unless your buying offshore parts. The internal dimensions on these lifters are measure in the 0.0001" range. Sure there are cheaper and more expensive models made but the real differences are in the fit of the internal parts. This controls leak down and pump up rates but in the bigger picture were talking about very very minor things for a street engine. Now if your plans are to spin a HD engine to 6000 - 9000 RPM these measurement are important but for the normal stock engine bike rider it not necessary IMHO.