block type question

fiveohpatrol · 05-30-2005, 09:40 PM

roller and hydraulic roller are completely different worlds. I'd love to see a hydraulic roller in a NASCAR engine

The faster you accelerate the valvetrain (ramp rate), the more advantage a solid lifter has over a hydraulic, end of story. Up to a point, there's not much difference. For a street application, either will work fine, which is why the engine mentioned above will work just as nicely as a roller block would.

Ieatcamaros · 05-31-2005, 05:59 PM

Quote:

I'd love to see a hydraulic roller in a NASCAR engine

OMG, that wouldn't last long. Probably not even a dyno run. IMO, I wouldn't run hydraulic lifters past 6000 for a very long time. The hydraulic roller lifters might stand that kind of RPM a little better than a flat tappet. I have pushed a hydraulic roller harder than a flat tappet motor and not had problems. Hydraulic lifters collapse at that RPM. That has been my experience.

05-30-2005, 09:40 PM	#1
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	Re: block type question roller and hydraulic roller are completely different worlds. I'd love to see a hydraulic roller in a NASCAR engine The faster you accelerate the valvetrain (ramp rate), the more advantage a solid lifter has over a hydraulic, end of story. Up to a point, there's not much difference. For a street application, either will work fine, which is why the engine mentioned above will work just as nicely as a roller block would. __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

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