Corally Kronos XTR Thread
#106
On top of the weight saved on the chassis - I've just saved a massive 273 grams of rotating mass.


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!

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....


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!

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....
#107




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.
#108



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.


Time to try a more appropriate motor and esc.



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