motor dyno

[speedy]

when i was on holls i saw 1 of these for sale at £110.00 but i did not get it :(
now i looking to get one can some peeps give me any advice on them the cost on the make as i will be look to get one but just dont know what one to get
thanks

[Remo]

i found the CS Motor Checker probs the better one overall since it can be used with or without PC attached and it tests at battery pack voltages (some say that could be a draw back) and it does everything you want to measure.

There are cheaper ones like the Integy Indy(???) but from what I have heard they are not as comprehensive and its not near the perfromance of the CS.

Fantom does a very good one called Facts Machine but from what I heard it measures at 5V and it needs a PC attached to it to work, so more to take with you if you go track side, but I can't imagine why take one to track side....

Creme de la creme would be the Robitronic, but that is serious money.... read that bit twice!!

Cheapest one would be second hand Tekin 900, I had one and it was quite good, but a bit dated now and doesnt measure all the parameters.

[DA_cookie_monstA]

does nobody do a rolling road, so you can test the motor in its native enviroment and actually trying to push the car?

[burgie]

I have an Integy motor dyno, and you are right it isn't comprehensive, but it gives you the very basic facts about your motors. RPM/AMPS/CONDITION. You can also adjust the running volts from 0 through to 9 i think. And you can run your lathe of it and rn in your new brushes. It does basically everything I need it to do. I have set up my motors on it and those of a friend. On both occasions, especially with my friends old motors, there was a definate, almost dramatic improvement. It also highlighted a problem with one of his motors that was causing him to dump - the motor was running at 15,000 rpm (an 11 double!) and was drawing nearly 12 amps. A bit on tinkering later, and the motor was back on top form.
Also, because the RPM is linear to the Volts you check them at, you can run the motor at say 4 volts, and still adjust the timing properly without fear of burning the comm. So, for me, the dyno is ideal.

[DA_cookie_monstA]

I must admit, I got the same results in the ast with a Sanwa Motor Dresser, it isn't so much as HOW much the machine can tell you, but how YOU interperet the results, and them implement change to overcome any anomolies.

I think in certain cases as well, things like sound come into it too, as you can hear the brush bounce, and whether the motor is faltering at full throttle, things like that. Just having the best peice of kit doesnt mean you have the best motors.

[burgie]

absolutely agree with that. even if people tell you that a certain dyno is rubbish, it's not that they have used it, its that they either haven't heard of it or they know its cheaper than the rest. So, dont be put off. In my opinion for a club racer the integy dyno, to my mind, tells you all you need to know. And, as cookie says, it's what you hear too that helps!

[DA_cookie_monstA]

Well, I know I am going back to 1996, but I used to prep all my motors on an analogue dyno, but the Dyno only gave me an indication as to what was going on, the rest came down to experience.

I had done loads of motors, for myself and a couple of friends, and then I started doing motors for paying people, and they said there was an improvement in run times and duration.

So, it isn't so much HOW much you spend it is more HOW much you learn.

[MikeS]

DCM - Absolutely right!
What a dyno WILL (should) tell you is how the motor is running, and more importantly, allow you to learn what changes to the motor result when YOU make an adjustment to the timing, springs, brushes, comm cut etc......
The more time you spend using the dyno, the more you will be able to relate the dyno readings to the performance you are seeing on the track.

A dyno like any tool, is a device to help YOU do a better job. Buy a "dyno" to develop/improve your motor tuning skills and hence your motor performance, not DO it for you as it won't!

[speedy]

thanks guy for the help very helpfull i think i will go for the Integy Indy as i can get that one for £105 and i thinks going by what your saying it a good one to start with
;D

[MikeS]

Cough.....you have a pm!

[lotusmark2]

any chance of that cough being passed on? ;)

[MikeS]

Cough, cough.........

[DA_cookie_monstA]

Don't I have had a cough for the past week, and still can't shift it, maybe i caught it virtually from Mike >:( >:( >:(

[MikeS]

[mark Fuller]

mike do you think it would be good if i was to get a dyno tester so i can get to now what does what?

mark :)

p.s if you think its good to have one tell my dad i need one he might get one ;D ;D

[DA_cookie_monstA]

They are a VERY expensive tool, that might not work for you, some people have a natural abillity, others just use it in the end as an expensive brush bedding in tool.

[lotusmark2]

My take on a dyno is that I would really LIKE one but I really NEED a comm lathe so the choice will be made based on that.

[DA_cookie_monstA]

You can't Dyno a knackered old motor and make it better, but you CAN Skim a knackered old motor and rebuild it exactly as it came apart and get the same performance from it, choice is yours, I know which one I would go for.

And, as I know what to check when spinning up a motor, a dyno is a luxury to confirm my thoughts, not a tools to tell me whats wrong.

[MattW]

Dyno's are fine if you know what you are looking at and know how to act on it. For example - Do you want to tune a motor for RPM, or Torque and then gear it up???

I personally wouldn't buy a dyno that doesn't load a motor in any way. Be that by way of slave motor or Flywheel.