redline

MiracleMax · 02-15-2001, 09:41 PM

It depends on what your trying to build/accomplish.

If your building a street car with longevity in mind then keeping the lift below .600 and staying in the neighborhood of 6500-7000 rpm will make it last, big lifts and hi-revs definitely lower engine life (which can for some engines that probably wouldn't be considered radical be measured in 1/4 mile passes)

Where are you planning on reving it to? Is it going to be carbed or EFI?

For a non-power adder engine, a high revving 302 is gonna need a steel crank, light weight forged rods/forged pistons and four-bolt mains (a P/A engine would need heavier duty components which add weight and increase strength, but everything is a trade off). Anyways such an engine can easily cope with 8000 rpm and probably more. As an example (and all BS aside) I have a smallblock chevy engine that has seen 9000 rpm more times than I care to think about. It features a cast crank, forged rods an cast pistons (all pretty lite weight), but it never stays there for more than a second or two. Besides the cam is a 278 adv. solid roller and makes peak power about 3500 below that, combined with the T350 tranny, it shifts best at 7000 rpm

If your talking hydraulic roller engine, using a 2.02 inch valve then probably the practical limit is in the region of 7000 rpm.

Solid roller cams open up some new avenues

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02-15-2001, 09:41 PM	#9
MiracleMax Registered Member Join Date: Apr 1999 Location: Hayes, Va, USA Posts: 798	It depends on what your trying to build/accomplish. If your building a street car with longevity in mind then keeping the lift below .600 and staying in the neighborhood of 6500-7000 rpm will make it last, big lifts and hi-revs definitely lower engine life (which can for some engines that probably wouldn't be considered radical be measured in 1/4 mile passes) Where are you planning on reving it to? Is it going to be carbed or EFI? For a non-power adder engine, a high revving 302 is gonna need a steel crank, light weight forged rods/forged pistons and four-bolt mains (a P/A engine would need heavier duty components which add weight and increase strength, but everything is a trade off). Anyways such an engine can easily cope with 8000 rpm and probably more. As an example (and all BS aside) I have a smallblock chevy engine that has seen 9000 rpm more times than I care to think about. It features a cast crank, forged rods an cast pistons (all pretty lite weight), but it never stays there for more than a second or two. Besides the cam is a 278 adv. solid roller and makes peak power about 3500 below that, combined with the T350 tranny, it shifts best at 7000 rpm If your talking hydraulic roller engine, using a 2.02 inch valve then probably the practical limit is in the region of 7000 rpm. Solid roller cams open up some new avenues