87vette81big said:
I know you don't like high Rpms over 6- 6,500 Rpms Grumpy.
Racers have been pushing the limits for decades now.
7k is considered a low revving engine in Race circles.
Drag racers turn 8-9 k typical.
Dirt track 8-10k.
Honda import fast & furious turn 9-11k.
Just saying.
What I like is, building cost effective,easily duplicate-able engines, from off the shelf components if what I need is available, if not I have zero problem fabricating some components or modifying whats available if required,engines that use mostly built from well matched correctly fitted components. I like having total predictable control on a valve train components and long term durability, with low maintenance and in most cases large displacement high compression engine combos
I prefer to keep the piston speeds under 4300feet per minute , and Id prefer to keep the compression as high as I can , simply because its generally going to make for a more responsive combo with higher torque in the useable rpm range.
now in most cases thats engines of 400 cubic inches or larger displacement, and when I can 11:1 or higher compression, so 7000rpm is about where Im comfortable limiting valve train speeds, and I have zero issues building bigger displacement combos that might never see 6500rpm.
given the choice Id gladly give up that last extra 2%-5% of potential horse power in exchange for an added 20%-to-50% greater engine life expectancy, which is in many cases a choice you ARE forced too make