hana166

iTrader: (2)

Question for Martin,

If I click 'Highspeed Timing from Switching point RPM' and also click 'Variable dependent timing' which one takes over?

If I exit a hairpin onto a straight, and go immediately to full throttle will I get full timing, or will this happen as soon as the switchingpoint is reached?

I prefer the feel of variable dependent timing but I don't want it to come in too early in order to control temps.

Thanks

MattW

If you set the switch point option, then it will wait until that point is hit before and additional timing is added.

higbo

Someone can make an outline of how work the timings in the GM?

Of style:

Star --> timing 1.......full thotle add timig 2.....

housey

iTrader: (1)

Hey guys,

Was thinking about getting the 120, but now thinking that a 90 might do me just as well. I just have a few questions.

Does the software update/programming differ between the two models?

What turn brushless can the 90 handle?

Is the 120 going to give me any extra performance doing 13.5 or 10.5?

So I suppose the big question is, what are the important differences between the two models?

Thanks!

tomracing

see answers in red

housey

iTrader: (1)

Thanks Tom, I think the 90 will be fine for the sort of racing I'll be doing for the foreseeable future. So I'll save myself a few pennies and get that one. Cheers again!

housey

iTrader: (1)

Now I'm just after one more thing, a starting FDR.

I'll be at this track,

http://www.ardentracing.com/raceway/

running a 13.5 and to start with will just be using the standard mode 9 setting to get me going.

Any ideas where to start? need any more info? Cheers guys.

hacker

iTrader: (141)

5

housey

iTrader: (1)

Cheers hacker, I'll give that a go today.

Martin Hofer

Which motor are you planning to run? cause it depends a lot on that

you could also adjust mode 9 at home so it works perfectly with your motor and just set like a pretty high timing
and then just copy it to mode 8 and set a little less
copy into 7 and set a little less
copy into 6 and set a little less and so on and so on

you can switch the modes via your transmitter which is really easy actually and you can adjust your speedo to the track conditions within 30 seconds.



as for 90 vs 120, i think for stock racing the 75 is by far the best speedo as you won't loose any performance up to 10.5T but get a lot! of room as the 75 is I think the smallest speedo out there.




as or speedo timing:
the gm speedo does not only do one timing. It can actually do any timing you would ever want it to do

- it can start with full timing right from the start
- it can start with no timing and add extra timing at some rpm
- it can start with 1 timing, then ramp until a second timing
- it can start with no timing and then do 1 timing and then ramp until 2 timing
- it can add timing at full throttle only
- it can add timing according to your throttle stick position, with and without a switch-rpm
- it can do a zero timing mode so it meets all stock class rules if necessary

you see, you can do ANYTHING you'd imagine with that speedo with some clicks

but actually after some testing i found settings that you just use 1 slider for bottom end and 1 slider for top end, and the switchpoint to go with the motor

13.5/17.5 you even only use 1 value to change and nothing else so it's really easy

pierred

Very interesting post !

The two sliders are timing 1 and timing 2 ?

Martin Hofer

No, the new software does not even use timing 1 and 2 anymore (but that's been written before)

amplimit is for bottom end (modified mainly, something between 140 and 180A is where you want to be) and fixed timing is for topend (for modified again between 5 and 12)

housey

iTrader: (1)

Well I got the genius 90 and 13.5 motor and ran it on sunday, wow!

It was geared at 8.2 with standard mode 9 after some advice from a guy who has been running gm a while there and it was super fast!

One little thing though, does the speedo turn down the timing if it sees the moor is getting too hot? I ask because I did lose some punch towards the end of each race, but it was still very fast, so only a slight loss of performance.

I guess once I get the usb link I can set it all up properly, perhaps a slight decrease in timing would mean more consistent power throughout the run?

Martin Hofer

Which motor did you use?

8.2 is really wrong ... the gm can produce the revs to make it fast but you motor will be happier with a harder gearing (I'd guess 5.8 on that track you race on!)

you will get more bottom end rip and more straight line speed! even though it sounds weird

housey

iTrader: (1)

Right I see. It is the GM 13.5 with the 12.3 rotor that I am using.

So going down to around 6 is going to be faster, but what about the temps? As I said before it was definitely slowing a bit towards the end of the run, is that because of the heat? And then does the speedo turn down the timing because of the heat?

Cheers for your help Martin.