Sirio2127

Thoose two cranks probebly have some really differetnt timingnumbers and you can not compare them to a heavy or light crankshaft.

In theory, if a crank is 5 grams ligter and you monunt a flywheel that is 5 grams heavyer you will be at the same point. It is the complete mass that desides the aceleration of the engine, not the weight of the crank itself.

The wolfram slugged cranks are a different story. You change the balancing factor of the engine. This changes the self resonating ( in lack of better words) frequency of the crank. When a cranksafts meets it own resonating frequency it takes alot of energy to overcome this. When you slugg a crank you move this frequency upwords and get higher rpms.

MRX 4; i agree with you. There is a lot moore bottom end with the paste inside the crank, even if it is not any lighter.

Mxwrench:

Dynos are important to manufacurers and have been in the auto industri for decades, and will certanly make its difference in our hobby. But, as anything else here not evrything can be messured, somethings still go bye feel. I am a little surprised that you can not see the difference between a standard crank and a crank with paste that is not lightened on the torque curve. I can understand that you can not see it on the HP curve since it is on low rpm. There is a difference and i you take two standard cranks and fill one, and not the other i am shure you can see the difference. I f you try it on the track you will understand what i mean.

I am very interessted in whet you can read out of the dyno, do you run engines for customars? Can i send you an engine and you make a dyno run? Whats is your fee? I have a few pipe that i would like to be messured and two engines that i have done myself.

Please e-mail me on [email protected]

Thanks.

Anders