Born2Run

Martin
I just got the GM #97226 7T delta wound.The timing ring is opposite to the C (on the Red).All the other motors i have use so far was in the midle,so i'd like to ask you (because i'll run it with a Mamba max speedo in sensorless mode) as a starting point if i have to leave it at this position or turn it back to the midle and make the timing adjustments (if it necessary) from the speedo as i have this option on my Mamba max? What do you suggest me to do?

Martin Hofer

1.

the timing is correct as delta windigns do have a diffferent internal timing than star windings.

2.

as you said you run sensorless, the timing on the motor is not important as it is not used.

if you time the motor you change the hall sensors positions but as those are not used thus changing their position does have no effect at all

Born2Run

Thanks for the reply Martin.

THancock

Hi Martin,

I have a GM 100. If I have been running it in sensorless mode with 30 deg timing and I then switch to using sensored mode, does the speedo automatically remove the internal timing or do I have to do that in the settings?

Thanks,

Tim.

Born2Run

Hi Martin

Today i ran for the first time the GM 7T delta with a Mamba Max speedo and i need your advise please.Before this i have to tell you that so far i was running with this speedo a MM 7700 with FDR 7.78 ,temps was 60-63 Celsious and it was very fast.After this i was running a GM/Dr.Speed 7T delta with the same speedo and settings but with FDR 8.21 and the same temps and it was faster than Mamba 7700.I was so happy until for some stupid reason i fried it (i dont want to rebember this fact anymore).Today i put on the new GM 7T delta and everything was different .To be close to the Mamba 7700 performance i have to go to FDR 5.9 and the temps are about 52-55 C.I haven't change nothing of the speedo settings yet.Timing on the speedo is on the normal position .Do you think i have to go to a ligher level with timing or gear up more? I think i'll never get the same performance i had with the Dr.Speed 7T but i don't understand why such a big different between these two motors.Seems to be the same but they aren't .Any comments or suggestions are welcome.

Martin Hofer

the dr. speed motors are different in some points:

dthe motor it self is different,
different magnet

you have to gear the evo3 much longer with the stock mag as there is a 13,5mm mag inside which has tons of torque but not that much rpm

you could change the mag to 12,5mm which should be a little better

or you just gear it even longer
the evo3 is more powerfull than the dr speed if geared right

Martin Hofer

the timing will be changed automatically

Born2Run

I'll give it a chance.I'll try this afternoon to gear up a couple of teeth and if it doen't change i'll try to find another Dr.Speed or i'll continue to use my Mamba 7700.

alan1467

Two questions

Both my 4.15 and 7T delta have developed a funny noise when running it sounds like a very fast clicking and it's there all the time but does not appear to be causing any running/speed problems, is this right???

Also where can I get a Genius 100 repaired in the uk?

Thanks

Alan

Martin Hofer

the motor case moves slightly. untighten the screws move the case slightly and retighten it. then the sound should be gone, if not, clean the bearings and reoil them

alan1467

Thanks for the reply Martin, is there anyway to stop it moving?

Also I need a 100 speedo repaired any ideas?

Alan

Martin Hofer

send it to gm / germany


no there's no way to counter the twisting ... but untightening and retightening the screws always helps

mark34

iTrader: (1)

Hi
I wonder if anyone can help had some issues with the gm 100 thermaling Gearing was 7.2 on a large track. I would make 4.30 then shut down I am running 5 cell mod. Just to let you know in the last run of the day I discovered that one of the motor wires had come off so could this possibly have caused the had thermaling if it had been poorly soldered all day. Please help as I am finaly getting to grips with the speedo and love it also to let you know air temp was 24c and track temp was 43c and was also running a 3.5 gm evo motor sensorless
TIA

mark34

iTrader: (1)

Anyone?

Martin Hofer

you can either add one of the optional heat sinks (the one that mounts above the esc works awesome) or gear it softer lke 7,5ish

what i need to know is how much doble sided tape you used to fix the esc in the chassi