Quote: Yes I have run 4.5 stroke stuff and IMO they ran like poo..Last one was a Stage V Hemi in my Barracuda car went 8.70's with that at 3000lbs. What a turd!!! The Stage V stuff was ok but it will be the last time I RACE an old school hemi unless I have a blower for sure. Had a lot f money in that motor for it performing like it did.
I do not understand why Mopar guys are so afraid of RPM. Only a few ways to make power and RPM is one of them. Especially if you are cylinder head limited RPM is the ONLY way to make power. If you build it right they will last just fine at a tad more RPM, but you have to have your comfort zone I suppose. IMO 8000-8500 in the traps is not gonna hurt anything and can be very durable if done right.
I agree 100%... I have always been a rpm guy.. and if you look at how HP/torque is measured... the number of pulses in a minute(pulse being a firing) and the more pulses you get in that minute the more power it will make... its just a matter of building the engine with light parts and good balance... most times I turn down the counter weights on the crank to move the weight in closer to the center line... then use light pistons... big stroke makes a ton of torque but that can cause issues at the line to maintain traction... I always look at what a pro stock engine is.. short stroke with big bores and a ton of rpm... but you have to have heads and induction to support the rpm then also you need good exhaust to get it out.. What I said before about running meth is that burns 2X the amount of fuels and that takes volume/area to get that quantity in and out... if you were to look at heads sold by different manufactures you will see that they have larger valves and flow over the gas versions of the same head
