What’s the difference on running a 58x107 to a 60x110 crank

[daniel whiteley]

As title , just bought a RT 195 kit and looking at a new
Crank , on mb site it says ideal to run the 60x110 , just wondering what the difference in gain would be ?

[rossclark]

You'll gain about 4cc because of the additional stroke.

The piston will move 3 mm further up the barrel at TDC and BDC meaning you'll need to use a packer and it gives you a bit of flexibility to play about with the port timings and the squish setting by using different thicknesses of gaskets.

[daniel whiteley]

But what power /torque gains would you get ?

[dickie]

But what power /torque gains would you get ?

2 or 3% if you maintain the same port timings. A lot more if you use it to increase port timings, maybe 50% but at the expense of low speed drivability.

[Meds]

Have a read of the MB tech site on RT set up.
My understanding is the use of a 60x110 makes it easier to optimise the port timings.
https://www.mbdevelopments.co.uk/info/m ... t+255.html
Or speak to MB, there's an rt owners site on faceache.