On top of the weight saved on the chassis - I've just saved a massive 273 grams of rotating mass.

https://cimg7.ibsrv.net/gimg/www.rct...b0921456bb.jpg
https://cimg8.ibsrv.net/gimg/www.rct...b53cb4b60b.jpg
So all told, my rig is now 508.5grams lighter.

That has to make a difference.

Power is technically the same, so it should accelerate faster with a better power to weight ratio. But it should also need less power at any given speed. So, assuming rolling resistance and drag are the same.....

Less power sap from a more efficient drive line has to equal more HP at the wheels, too.

However, it's not as easy as I thought it was going to be converting all this additional power and better power to weight ratio into speed because: traction.

My rig has less of it at this time of year. Additionally, I think the extra weight on the older chassis was making it easier for me to put the power down.

Now the rig is lighter, I can smoke my tyres - even the Jetkos.

So, time will tell. But this rig is an absolute beast on 6S now. Initiate a wheelie at 50 mph? Yeah, if you like. Like it's nothing!

https://cimg4.ibsrv.net/gimg/www.rct...f87558d242.jpg
When people think of speed run cars, they likely imagine perfect pass - highly modified V2E, Limitless, with small wheels, running foams and a tiny spool with giant pinions.

They push their cars with a foot to get them rolling and do 1 pass at 150 mph.

This rig sits upright, ready to go off road, using Truggy sized wheels on a Torox 160A ESC and it can do 65 all day. I know it's got more in the tank though. It's just a matter of time....

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https://cimg1.ibsrv.net/gimg/www.rct...236bfcdd52.jpg
https://cimg2.ibsrv.net/gimg/www.rct...48139bf24a.jpg
https://cimg3.ibsrv.net/gimg/www.rct...b844d849bf.jpg
https://cimg4.ibsrv.net/gimg/www.rct...0e0d423f35.jpg
Kagama arms now replace the Kronos ones. They are a direct fit and firm up the geometry. Optional carbon fibre arm stiffeners are on the way, direct from Corally.

The alloy reinforcement ring is a nice touch - where the pivot ball threads in.

The arm is slightly longer and this affects Camber and toe, both of which required adjustment following the change.

I use small shims to take up the slack on the upper arms pivot pins - these are still required with the Kagama arms and are in addition to the caster clips.

https://cimg1.ibsrv.net/gimg/www.rct...1c0d5de72b.jpg
https://cimg6.ibsrv.net/gimg/www.rct...46b3c634f0.jpg
https://cimg7.ibsrv.net/gimg/www.rct...9ced6c510c.jpg
On 19/46 gearing, 6S and a 10°C day, the car did hit 66 mph, which was good considering the limitations of my £50 motor.

The Scorched Parts titanium 168mm drive shaft for limitless fits up nicely, with 2 small fuel tube cushions.

The car drove better on 17/46 and was still punchy enough to pop wheelies - at 50mph!

So for now, with the current ESC and motor combo - I am not able to hit 70mph, despite the modified chassis. The car handles great and is lighter - but no speed record.

https://cimg4.ibsrv.net/gimg/www.rct...ee65d57dd1.png
https://cimg5.ibsrv.net/gimg/www.rct...57347aadc1.png
Time to try a more appropriate motor and esc.