Anyone ever made a...

Kappage · Post by **Kappage** » Mon May 24, 2010 12:40 am

Rolling road, Dyno what ever you want to call it.
Has anyone ever made one? A friend and i have realised we have access to all the parts to make one (hydraulic one) and the ability to make one, even the coding to make a program to give us a nice pretty read out :P. Now just to do it, we are still looking to source 4 big rollers.

Any tips or suggestions?

seagull · Post by **seagull** » Mon May 24, 2010 12:55 am

so you found this at ray F house ?

spike · Post by **spike** » Mon May 24, 2010 9:21 am

we havent made one but wee have fixed one and modified it from 2 wheel drivve to 4.
the hardest thing your going to do is calibrate it.

AndrewT · Post by **AndrewT** » Mon May 24, 2010 11:03 am

you might not need big rollers if you make one which bolts to the hubs of the car instead. I think this would be more accurate too as there's no chance of any wheelspin or other movement in the tyres.

spike · Post by **spike** » Mon May 24, 2010 3:24 pm

your probably right there andrew.
but ive never seen a problem with wheel spin so yeah.
problem with hubs is the need for interchangable hub adaptors

what imreally looking at building is a shock dyno

Kappage · Post by **Kappage** » Mon May 24, 2010 5:05 pm

Yea the one we will be making will be rollers, and 2wd havnt even thought about the 4wd possibility.

That was our main thought into it, that if we do make one how do we calibrate it, so at first the idea is to make one that can be used to compare cars, then figure out how to calibrate it.

But at the moment its all in the planning stage we both wont be finished exams for another 3 or four weeks, then after that comes serious planning, and like my old metal work teacher use to say, measure 3 times cut once. In this case we only want to make one not three or four prototypes :P

spike · Post by **spike** » Mon May 24, 2010 5:16 pm

if you can organise 3 cars
get proper dynos done, all at the same dyno shop
do all your logarithms?? lol
and you shoulde be able to work it out

Kappage · Post by **Kappage** » Mon May 24, 2010 5:26 pm

Well i can get my hands on a 66 mustang with thats been on a dyno, a ba XR8 aswell, but they werent the same place, but i suppose getting three cars tested at the same place would be easier / more accurate.

spike · Post by **spike** » Mon May 24, 2010 6:41 pm

yeah deffintaly more accurate

wrxer · Post by **wrxer** » Mon May 24, 2010 8:15 pm

doesnt need to be accurate, just needs to be consistent. dynos are variable between each other anyway. as long as you know if after some mods you have more or less power than you had before. rollers are just pipe, maybe 10 or 12 inch, cap them and put your drive on one end.
you can use a power/speed calculator to figure hp and torque.