Anyone ever heard of this: Home Dyno
 

I was looking at this dune buggy site and came across this thing called the Home Dyno. Does this work? It sounds better than the G-Force thing.

http://www.charm.net/~mchaney/homedyno/dynokit.htm

Re: Anyone ever heard of this: Home Dyno
 

sounds like bs

Re: Anyone ever heard of this: Home Dyno
 

where the computer geeks at!

Re: Anyone ever heard of this: Home Dyno
 

I raise the muthafuckin BS flag 10 feet high for that one

Re: Anyone ever heard of this: Home Dyno
 

"that sounds like about... mmmmmmmmmm... 333 horsepower right thur"

Re: Anyone ever heard of this: Home Dyno
 

bwa ha ha ha, it hooks up to your spark plug wires. lol. that ---- dont do jack i bet.

Re: Anyone ever heard of this: Home Dyno
 

I would rather get a g-tech

Re: Anyone ever heard of this: Home Dyno
 

According to my precise calculations, it's gay.

Simply Genious! Why didnt I think of that? You see, if you have your spark pulses in a WAV configuration, you can play them back using media player, giving you exact hp/tq numbers. Awesome!

Re: Anyone ever heard of this: Home Dyno
 

lick your finger and stick it out the window when you take off, you'll prob get a better reading

Re: Anyone ever heard of this: Home Dyno
 

It'll work, it just takes a large amount of setup time. You have to know everyting about your car to get the math just right.

Weight, transmission gear ratios, tire diameters, etc. are critical to making the thing work. Basically, one revolution of the engine, will rotate the tire a particluar amont, in a particular gear. Tire diameter, when calculated with the amount of rotation, gives distance covered. The pickup on the plug wire counts revolutions against time. From there it is a matter of calculating the number of revolutions (distance covered) against the elapsed time.

If you know all of that, then the math will tell you the rest. Road Dyno provides a way to collect engine revolutions over time, and a way to enter all the info needed to extrapolate the rest of the performanc info through calculation.

We were looking at this solution as a way to baseline our project cars. We may still buy one to try it out. I the meantime we purchased a G-Tech unit, which we are not too pleased with. We thought it would be simpler to use, and it is. But the information is limited. The G-Tech unit shows only net HP, not actual. This means that wind resistance, driveline loss, and other factors are not compensated for.

This means that our 106Hp CRX, is rated at 82Hp by the G-Tech unit. The nice part is that there is no analysis to be done, unless I want to use the 1/4 ET given by the unit, to convert back to actual Hp.

I'll stop now...

Craig ;D

Re: Anyone ever heard of this: Home Dyno
 

My brother just purchased an obd2 scan tool, to read and clear cel codes and check sensors, it actually gives you voltages, water temp, rpms, maf and map signals anything that it's monitored by the ecu. It also has a 1/4 mile fuction, it starts working as soon as the rpm signal starts moving and measures the time. It also has a dyno function. I have not tested this thing yet, of course it will not be accurate, but could be fun. I hooked it up one night in the WRX with my laptop. It was raining so I wasn't able to run the 1/4 or the dyno, but I checked everything else and cleared my cat deficiency cel.
I will post on results as soon as I can get this scan tool again.

Re: Anyone ever heard of this: Home Dyno
 

http://www.charm.net/~mchaney/homedyno/dynokit2.jpg

This^^^ Plugs into this vvv

http://www.huntingdonsucks.com/gallery/picx44.jpg



:P :P

Re: Anyone ever heard of this: Home Dyno
 

orrrr you can hit up a REAL dyno and save the headaches

Re: Anyone ever heard of this: Home Dyno
 

This suff actually works pretty good if the information you put in isn't too far off. It's pretty consistent and that's all that matters. Peak power numbers are just that, numbers and don't mean much on their own anyways.
It's a pretty good tool for when mapping on the street, it can tell you whether you're faster or slower than last run, much more consistent than the butt dyno. Plus you don't have the cooling problems you have on the chassis dyno.
The G tech, although it produces fishy numbers it's kind of consistent, but it doesn't tell you the torque curve so you don't know where the improvement was.
If you want a true horsepower reading and laboratory level mapping, get an engine dyno with a water or eddy brake.