Horsepower?

[Banchetta]

I wouldn't claim to know everything about dyno after admitting you've only had your car on one 3 times...... I have over 100+ runs on a dyno between my shee, street bike (gsxr750), Duramax Diesel p/u, and tuned in several other street bikes on dyno for performance shops.....I don't know how you can get the same numbers when the last dyno on my shee, I got 4 runs in a row w/ 1-2 hp differences between them from my motor getting hotter.....same thing w/ my duramax......I got 10 hp difference from 180 degrees (engine temp) and 195 degrees.... same goes w/ the street bikes......I'm sure you don't log in your temp. or whether or not the car was cold and just got to temp before the run or even been running for 30 minutes before the run, because this DOES matter.....engine temp will play a part, along more variable that you can shoot a stick at...Whether you spent 100 grand on a dyno or 10 grand, there are still the variables that dynoes can not correct...the more performance you get from a motor, the more sensitive it gets to everything else.....you are correct about the dyno giving you the hp numbers, but you can't put a mod on and retest a week later and say whether the mod worked or not. You must do a run to get a base, change the mod, and rerun asap,,,,the less time between runs will give the best results of the mods....

[dirtbike killer]

I'm not running off. I could cut and paste some article too. But why? You guys are missing something, or maybe I'm not clear enough. I refering to the 3 dynos you said that you have been on. You guys are acting like when I say the same that I'm saying exact. With my bike tuned correctly for the summer. I would run numbers in the range of 49-52 for a good part of the summer. This was off two different dynos. Yes I would get times, here and there that it would run a little worst. But that had to be one sh-ty day. You dont give me or other people the credit of knowing the obvious, or may i'm not giving you enough. On your normal summer day my bike will run these numbers. To me this is the same. If I had a bike that ran fat on the jets all the time, My numbers would change a lot more depending on the day and temp. A fat running bike would be more tempermently about these things. A bike thats running good would not. My car runs 585-603 during the summer, and 590-651 in the winter. To me this is normal. If someone asked me how my car ran on the dyno the next day, I would the same. Its a supercharger car so the cold weather really makes it pick up. Before I got it tuned in it would be all over the place in the numbers. Now it stays about the same. A dyno is more accurate the closer to true things are, that it believes to be true. If the car it not straped down right, its a stick shift, or just has so much power that it would stay glued. You have to to fix these problems or the dyno wont be correct. People have to know what there doing. My friends stick 67 mustang had problems, so we straped it down different and rolled on the power slower. This is pretty common knowledge stuff. When I ran my car in sac, I dont know what to believe. I just got the supercharger last year, I dont have it tuned quite right yet for that attude. So those nunbers change a lot. I know this. When I get it tuned in the dynos will start getting more consistent. If you asked me what my shee puts out I would say 52. If you asked me what my car puts out I would say 603. I believe these numbers to be a very good estimate of what these put out.

 

pics of car

[Banchetta]

You have to be careful on what you say, since a lot of people don't understand a lot of this, you can't say 2+2=4 when it comes to dynoes since you have the variables.....Your talking a range of numbers, most people think of one number only.....