EvilRufusKay Posted August 23, 2004 Share Posted August 23, 2004 So I have this Dyno at work that I use to do Horsepower / Torque curves for various electric and pneumatic motors. My buddy was telling me about his RC car and how fast it was when it hit me...why not put it on the dyno!!! The dyno has 1 input obviously. So my question is since the RC car actally has a LSD can I block one wheel and couple the free axle to the dyno? The other idea is to build a drum like is used on full sized dynos and set the whole rear end on it? The problem there is that on a full sized dyno the weight of the car holds it down right? I am afraid the RC will lift unless I apply a downward force which would make the motor work harder. I don't know that much about full sized dynos so any info / help / ideas are welcome and appreciated. Rufus Quote Link to comment Share on other sites More sharing options...
peej410 Posted August 23, 2004 Share Posted August 23, 2004 what about AWD cars lol ive got a full carbon fiber rs4 pro with a 12 turn infinity motor in it its evil Quote Link to comment Share on other sites More sharing options...
EvilRufusKay Posted August 23, 2004 Author Share Posted August 23, 2004 Is AWD common for RC? I suppose instead of a drum I could build a belt so that all the wheels would turn the dyno. I would be suspicious that the ratio between the circumference of the belt and the dyno would screw up the numbers though...unless there is a correction factor available in the software....hmmm... Quote Link to comment Share on other sites More sharing options...
peej410 Posted August 23, 2004 Share Posted August 23, 2004 i dunno but it sure is easy enough to pull a motor out of an RC car mines two allen heads and its out, i also used litespeed connectors on it as they are near zero resistance Quote Link to comment Share on other sites More sharing options...
JMortensen Posted August 23, 2004 Share Posted August 23, 2004 So my question is since the RC car actally has a LSD can I block one wheel and couple the free axle to the dyno? I've only looked at one RC LSD and that was many years ago, but on a car LSD this is a good way to wear it out really quick or break it. It would also work on an open diff, but even there it would be REALLY hard on the spider gears. Pull the motor out or get a roller long enough to put both wheels on. Quote Link to comment Share on other sites More sharing options...
materchan Posted August 23, 2004 Share Posted August 23, 2004 g tech it. Quote Link to comment Share on other sites More sharing options...
stony Posted August 23, 2004 Share Posted August 23, 2004 Rc car diff gear is usually plastic with ballbearing and spring pressure determines how tight it holds. If you spin on wheel you will melt the diff. Figure out some way to direct drive the dyno like some real dynos do on the rear hub or like a motor dyno does. Quote Link to comment Share on other sites More sharing options...
EvilRufusKay Posted September 1, 2004 Author Share Posted September 1, 2004 Thanks Guys. I don't get emails telling me posts have been made to any thread I start or add to so I have not been to this one in a while. I like the idea of simply pulling the motor. I have never had one apart so I will have to convince my buddy! Quote Link to comment Share on other sites More sharing options...
peej410 Posted September 1, 2004 Share Posted September 1, 2004 youll also need something to keep track of rpm and amperage being used Quote Link to comment Share on other sites More sharing options...
EvilRufusKay Posted September 7, 2004 Author Share Posted September 7, 2004 Rpm would be recrded by the dyno. No amperage as the car i am talking about is fuel. Also after talking with my buddy he said his diff is all metal!! Quote Link to comment Share on other sites More sharing options...
peej410 Posted September 7, 2004 Share Posted September 7, 2004 ooooh i thought u were running electric cars..... his diff could be metal but that doesnt mean that its not a ball diff with a metal gear and metal sides... it would still flat spot the balls even though most are carbide. Quote Link to comment Share on other sites More sharing options...
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