Timing- quick help!

[Basstronics]

Im getting ready to go run my rigger for the first time.

I have a Leopard 3650 3900kv, Hobbywing 120A ESC, 2200ma 3S 30c batts.

Timing is set at stock 15 degrees.

My options are: 0, 3.75, 7.5, 11.25, 15, 18.75, 22.5, 26.25

In their chart there is a columns and Im not sure if its a guideline or what you should use. 3 Cells, 3.0 LVC, 7.5 degrees.

Also, how do you know what the timing should be set at?

Short response OK. Im gearing up to get out of here soon!

[martin]

That is a d wind motor so you want low timing around 3.75, 3900kv on 3s is quite a hot setup around 43000rpm unloaded so keep an eye on temps. With the HW esc you may find you have to set with no lvc & time runtime as they have a very sensitive lvc & tend to cut in to soon even from the start of the run & the boat will run slow. This problem has been discused many times on this forum re the 120A & 180a esc.

[martin]

You dont follow the columns, you set each line to what ever set up you have.

[Basstronics]

Thanks Martin!

I was aware of the LVC issue and intend on defeating it.

m4a1usr (John) helped me pick this motor combo. Ya shes a screamer! I will have her proped small- so should work out well (X632).

Will have video when I get back.

Thanks again!

[lenny]

That is a 3.5D wind so 7.5 should be it, Like the chart 3 Cells, 3.0 LVC, 7.5 degrees.
Run 1 minute and check temps and then if all good, Run three minutes and check.
Good temps on motor is tops 145f, The lower the better.

[martin]

Your going to get quite short runtime on a 2200mah capacity with that that set up as well, not just because of the high rpm but thats a small capacity battery for that size motor, so keep an eye on your run time as you only have around 1700mah usable capacity without going to low on capacity.

[Basstronics]

Thanks Lenny! I see some differing opinion. I will give her a try at the lower one then up it to the 7.5.

I will be checking temps and leaks during the run as this is a new build- well rebuild.

[Fluid]

Neu recommends no more than 5 degrees advance on their 'D' wind motors, there is no advantage to more, just more heat and amp draw. I run my 'D' wind motors at 1*.

As was stated, that is not enough battery for your setup. The cells can't deliver more than 66 amps safely, you will be well over that with almost any setup. Those are barely adequate for a SV27 setup. Good luck....



.

[lenny]

Fluid,
Should I move my timing down from 7.5 on my Leopard 4074 2200kv ?
It running good and temps are good, But could it be better by lowering the timing ?

Thanks for any info.

[martin]

Your 4074 2200kv is a y wind so on a HW esc if thats what you have start at 11.25 & up to 15.

[Gary]

Fluid,
Should I move my timing down from 7.5 on my Leopard 4074 2200kv ?
It running good and temps are good, But could it be better by lowering the timing ?

Thanks for any info.

Why not try it and see what happens? Its the only way to know. Test, Test, Test.................

[dana]

Fluid,
Should I move my timing down from 7.5 on my Leopard 4074 2200kv ?
It running good and temps are good, But could it be better by lowering the timing ?

Thanks for any info.

im running mine at 15 with good results.

[Basstronics]

Video posted. Now to work on the carnage.

What size battery would anyone suggest for this motor? Where my ESC is it was a somewhat tight fit as is. I put the battery in vertical so the skinny side was on the sides, high side was vertical.