GT7's are rock solid now, over the past months very few have been returned due to faults (maybe just 1).

TC2 was a good speedo except the on/off button can play up, this maybe why the gt7 saw the return of a normal switch.

The power and profiles on the GT7 def out run the TC2.

Keyence = Hella reliable !!!

Had mine for 2 years or so, worked absolutely perfect until I (me) reversed battery wires (any speedy would hate this) so i sent it back to manufacture, and a brand new replacement one was sent within weeks at very small cost.

Apart from this, I have never seen a Keyence go up in smoke.
:rolleyes:

Sounds like I should keep my....
 

old Novak T1x then with its 12 or so fets even if it isn't the smallest Esc around lol..

So how do I tell the difference between the 1st and second generation GT7?

Is that the Zero V Extreme? or A01 or A02?

Thicker wires on the power cap, smd type diaode and profile #5 is the new default setting. (profile is for mod racing). HEI have been distributing plenty of the revised GT7 for quite some time now.

Thanks for all your replies and suggestions.

Zero V Extreme :)

Ive plugged my TC2 into batteries the wrong way before, killed a pack, and its still works flawlessly

:batman: Yes but dont forget that we r also demanding more current than we ever used when i started racing some time ago now! you u were the gun if you raced with a nine turn black scrc were the packs to have .There will be a few who remember them now we race with 3300s and 6 turn somethings gotta give! Nosram have been the best speedos ive found blow one up under warranty of course and u normally have a replacement under two weeks AWESOME!!!!!!!!!!!!

heck, there's a few here who remember racing with 1200s and Tamiya's hump packs were the go.

Peak charging those consisted of keeping your chargeleads on until the plastic hump case softened & bubbled... :p :p :p


What's an ESC?? :D :lol: :D

Re: Quantum Competition 2 ESC Problem
 

When you crash there can be a huge power spike flying thru your electrics.

Our wires are huge, no plug resistance when you hardwire & the motor isn't bothered by spikes and the ESC's FETs can handle heaps of current... so, the common weak point is the soldered interface between ESC's PCB and its surface-mounted FETs or the PCB tracks between FETs & wire.

Think there's enough leeway there for FETs to move in their soldered footholds and short out against something else but the evidence is hard to find. I have inspected many similar charred remains (including a Nosram DomPwr) but the fire is usually hot enough to dislodge other electronic components too.

Quantum Competition 2
 

Anyone tried the option of the "World Kit" (2 x Capacitors, & heatsink)

Maybe this would solve any issues????