Normal engine Vibration??

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Re: Normal engine Vibration?? [Re: Crocker] #149666 11/13/08 06:58 PM 11/13/08 06:58 PM
Joined: Jan 2003 Posts: 75,092 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,092 A Banana Republic near you.	Quote: John, I guess that's what I am wondering. If a big 550 hp stroker engine is strapped to a dyno and ran up to 5500rpm, what type of vibration will come out of the thing? What's normal? I am talking about what you feel with your hand. I know that's not a very technical way of testing. All I can say is a very fine light vibration (a little rougher than an electric razor)starts around 5000 rpm and becomes somewhat more noticable from 5000 to 6000. I'm sure a stock stroke 340 balanced with light weight pistons will not have the same dynamics as a stroked hemi ...again what's normal... for a stroked hemi? correctly balanced is correctly balanced it don't matter if it's a 318 or a 3000 HP blown alky motor ... that's how I see it , it's either right or it's not ... then again when we dyno'd the enginemasters 470 on the first pull that it went over 700 HP on the dyno we were using I distinctly remember the floor in the room outside the dyno cell RUMBLE at the upper RPM's So what do I know ?

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