Holmatas

Hi all,
can a tech aero ibec switch be used when i use two batteries ?
Ultra stick with TP10 gas engine, 2200 mah LIFe battery powering the receiver and a 2000 mah Lipo powering the ignition. If i connect ibec to receiver channel 5, it gets power from both ends and kill switch becomes live at all times ?
cheers.

speedracerntrixie

My Feedback: (29)

No need to run 2 batteries. Run the single LiFe battery for the ignition and receiver. Set the jumper on the IBEC for 6.1V and you are good to go. The additional battery is just more weight you don’t need.

BarracudaHockey

My Feedback: (11)

This^^

The whole point of that device is to power the ignition from the receiver

Holmatas

The engine won’t run properly on the 2200 mah battery alone , it won’t idle, it does run at full revs but runs terrible at idle, stalls when throttle is increased .
With two batteries connected it runs fine.

speedracerntrixie

My Feedback: (29)

That’s not normal. You have an issue with the ignition.

Holmatas

Would the IBec be better set to 6.6 v to match the 6.6 LIFe battery?

tedsander

It depends on what your ignition module specs. Some cannot handle higher input voltages, and will burn out. If within spec and you have been using a LiFe to power the ignition successfully, then YES, setting the output voltage higher on the IBEC will help. But, it is a rare ignition module that actually needs 6+ volts. Most are very happy with as little as 4.8. I'd suspect voltage drop in the wiring (too long of a run and/or not heavy enough of a wire gauge). So if your IBEC is set to say 5v, but the wiring is causing a 1/2v drop, then the module is only getting 4.5, and is struggling. Bumping the IBEC to 6.6 would result in the module seeing about 6, which should make it happy.
There could be other reasons for a voltage drop - like brownouts due to too many things pulling power from the receiver connection (not enough to glitch the receiver, but coupled with a "low" output setting on the IBEC, enough to give the ignition fits).

speedracerntrixie

My Feedback: (29)

You could try but the ignition should work at 6.1V. If it requires more voltage then that it is defective and will eventually fail completely. It’s also possible that if your plug gap is too large for the ignition not to work at lower voltage, or plug cap is not installed correctly. Those two things are a shot in the dark but worth looking at.

BarracudaHockey

My Feedback: (11)

Most battery problems dont show up at idle, they can't keep up at full throttle.

Holmatas

My ignition is a Turnigy Power
Applicable voltage is 6-12 V
Thanks for the comments so far ,i will check plug gap and may try dropping the Ibec down to 6.1V
Just checked plug gaps on two new 1/4-32 plugs, measured 0.14''
cheers.

speedracerntrixie

My Feedback: (29)

That plug gap can’t be right.

Holmatas

Sorry, my mistake, should have been .014”
It says somewhere else on this site that 1/4-32 plug gap can be .022-.025, does this sound unreasonable?
cheers.

speedracerntrixie

My Feedback: (29)

You can try opening up the plug gap and see if it helps. I would also try to find any reviews on that engine to see if others experienced the same issues.