So here we are onto the final and hopefully the most exciting part of the 2S 3S and 4S handling and speedrun test.

For this test, we're using the Centro 100c 7600 MAH. 4S lipo to give us the best possible chance to achieve the highest speed with a high capacity and also a high discharge rate with the 100C rating.

For this test we will be moving onto the road adjacent to the testing area that we used for the 2S and 3S speed and handling runs after we've done the 4S handling run, the reason for this is the testing area for 2S and 3S is probably a little bit short to allow the vehicle to get to its top speed.

So the road next to us, although a bit narrower, has a much longer total length to allow us to hopefully get to the vehicle's maximum speed.

So the batteries are in the vehicle and let's get it out and see how it handles on 4S, first impressions are that the addition of the extra voltage and RPM that come with the 4S lipo have given the car an almost demonic quality with acceleration now being instantaneous and coming along with the car squatting down on its haunches and firing off towards the horizon with great enthusiasm.

Oversteer is now an immediate and inevitable reaction to large throttle inputs but it also seems to balance the chassis allowing large slides to be conjured up almost at will like some kind of 'drift wizard.'

This is certainly very entertaining and it adds an additional fun factor to the car, whereas before it was certainly a quick car and able to put a smile on the face on the tarmac for straight-line speed as well as general messing about but the addition of 4s bring a whole new level of RC Lunacy to the table which brings us to the speed run part of the 4s test.

As mentioned previously, we will be moving to the road as it's got a much longer overall length which will give us a chance to get the car up to its top speed which from previous tests I have seen was between 45 and 50 miles an hour depending on the conditions. So let's begin.

The first pass or two are quite steady just to try and get a little bit of heat in the tyres and also get a feeling for what this is going to be like in the straight line. And first impression is that it feels absolutely rock solid. No problems at all to report and the even was a nice little shimmy of the hips as you put the power down on the slightly damped tarmac so onto a fast one, first fast pass and the car seemed very stable and we managed to achieve 44.2 mph which is quite respectable but I think there's definitely more in there.

So let's go on to the second pass and see if we can't push it a little bit harder. So here we are on the second pass full power has been achieved right from an early point and the car seems to be definitely going faster and then suddenly disaster because we spin out to the right on the hand side on some wet leaves in the road and impacts into the kerb at what must be nearly 45 mph. 

Not what we were looking for so let's go and have a little look at what's happened there. The shell looks ok but the wheels look at a bit of a jaunty angle let's get the shell off and have a look, and oh my goodness, it would appear that the car has snapped clean in half at the rear bulkhead.

That's a disaster and a definite end to the speed run /test so there's only one thing left to do and that is pick up the car 

(Harder than normal due to having twice as many parts) and head home to get it fixed to finish the test.