Engine Comparisons (Dyno)

[Gollum]

Hey, didn't really know where to post this, since we don't have a dedicated dyno section, and this isn't really about any particular engine as much as it's about engine theory.

 

So I started gathering dyno sheets from the web, and I know that there's a million different reasons why NOT to compare numbers from different dynos. What I want to talk about is NOT related to figures themselves, but rather I've been studying HP CURVES and AVERAGE power in a given setup. The more I research the more I'm starting to NOT like turbos. Sure they offer some crazy power, dynamic power level/tuning, and good off the throttle gas milage. But at the end of the day what they take hurts and makes what they give you questionable.

 

What I'd LOVE to get my hands on is a dyno sheet of someone's turbo motor that's actually being raced on a regular basis, and what RPM range they're usually in.

 

I'm also becomming increasingly agitated of people's ignorant view of HP vs Torque, and I find it amazing that people can never grasp that they're esentially the same thing. People refuse to believe that they're one, and resort to using analogies like this "If you hit a brick wall HP will tell you how fast and hard you hit it, torque will be how far you go through the wall". It's simply a barbaric understanding of the simple formula that HP = TQ*RPM/5252. Torque is very meaningful, but MORE meaningful I think, is HP curve. How big is it? What's it shaped like? What did it take to get there? Is there room to prove on that motor? To what extent? These are all questions I think of when I look at a dyno and try to figure out what this engine is really doing.

 

And with all that as a minor disclaimer (I'm long winded, sorry). Here's my work thus far:

 

 

Thanks also to Chris (rudypoochris) who helped me out with some formating and some discussion.