jgkurz Posted February 28, 2003 Share Posted February 28, 2003 Hi all, I am planning on getting my car on a chassis dyno in mid March and have some questions. I've observed the same car on a chassis dyno and the peak HP and torque varies based on the transmission gear. In theory I could brag my car puts down 400RWHP if I did the run in say 3rd gear when it actually is only 340RWHP in 4th gear. These numbers are only hypothetical. I would think 4th gear (1:1) would be the most accurate gear. Is my assumption correct? What gear do you all recommend so I can properly compare with other HybridZ cars? I do realize that all chassis dynos are different and are really for proving HP and torque improvements. My estimation is that most chassis dynos would vary between 10 and 15% on the same car. Regards, Quote Link to comment Share on other sites More sharing options...
johnc Posted February 28, 2003 Share Posted February 28, 2003 Check my post in this thread: http://www.hybridz.org/phpBB2/viewtopic.php?t=18693 Quote Link to comment Share on other sites More sharing options...
jgkurz Posted March 1, 2003 Author Share Posted March 1, 2003 Great write up johnc. With that said, should a dyno run be done in a 1:1 4th gear for the most accurate results? What have other people done? Quote Link to comment Share on other sites More sharing options...
johnc Posted March 1, 2003 Share Posted March 1, 2003 All chassis dyno runs (3 exactly) that I've done have been in a 1:1 ratio gear in the transmission. Quote Link to comment Share on other sites More sharing options...
Guest zfan Posted March 2, 2003 Share Posted March 2, 2003 1 to 1 is correct, 3rd gear in a 700r4. Mike Quote Link to comment Share on other sites More sharing options...
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