I need some numbers on a couple different things for the early gen legacies, particularly the 90-91 Legacies.
I stumbled across something called Road Dyno. It is basically a device that is like a dyno for your car, but you can use it on the road.....You must enter some fairly detailed specs and what not. It connects to the car through an EMF style spark plug pickup, or through two alligator clips where you can hook it up to the ignition pulse sender from the ECU.
Rather then me try to tell you all about it. Read the info on the site. It's complete, and detailed http://www.charm.net/~mchaney/roaddyno/
I have just gotten mine. There are two main parameters I do not know yet. The one is the stall speed for the auto trans. That one I could probably play around with, or use a standard something.
The one I'm more so looking for is frontal area. Anyone have any leads or info on this? I have checked the info Dave got a hold of. It does have drag coefficient, which you do need, but I did not see anything about frontal area.
The unit also takes in account for weather conditions, and there is a drivetrain loss factor so you can see what your engine is putting out. When I have all my info and do some runs I will go to a truck scale, weigh my car on or near empty, and then after I get gas and see what sort of difference in weight that makes. I will also be able to extrapolate a weight....depending on gas level. I may try to get a reading at 1/2 tank as well. The fuel tank is not perfectly rectangular. So fuel weight is not linear....but it should be close enough.
Dave's site http://www.i-awd.com/Impreza2.html is where I originally found it. He has examples and results from it. He really likes it.
I would like to get a dyno run for my car on a real dyno, and then do the road dyno on the same day with same weather conditions so I can compare results, and check on the accuracy.
One other thing you can do with this bad boy is get 0-60 times. You can also take the information from the road dyno and plug it into these guys' excel spreadsheet and get a graph of your torque vs. gears, and optimum shifts and such http://integra.vtec.net/geeser/shift_points.html
So.....if anyone has any info or know where they or I could look for the info I would greatly appreciate it.
I will keep everyone posted on the road dyno results. I've been out of town for the past few weeks and will be again this coming week, so car work has been close to impossible to do.
Josh
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Josh Colombo
<mailto:Josh@surrealmirage.com> Josh@surrealmirage.com **NEW**
"Life, an ever-changing melody
of beats and rhythm" - ME
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Detailed info on our cars / Road dyno
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