But how to increase power and torque?

Basically, we have a very simple concept with the BMW 2-valve boxer. However, the almost infinite combination possibilities that this opens up create many variants and thus also very many different possibilities. We have cylinders/cylinder heads with a bore diameter of 84.8mm/94mm/98mm, exhaust valves with 38mm/40mm, intake valves with 42mm/44mm, exhaust manifolds with 38mm/40mm, carburetors with 32mm/38mm/40mm passage, camshafts with 296°/308°/320°/324°/334°/344°, plus open filters/funnels, original exhaust/2-2 system/2-1 system/with TÜV or open, single or dual ignition.............
Now you could say, you just take the "thickest" of everything. That has a logic and is also often carried out in the same way. However, these are often the ones with the long faces on our test bench, when all the theory simply does not want to be reflected in measured additional power and torque. 
If only it were all so simple. In the end, however, it has less to do with witchcraft or some miracle camshaft. It's more physics, knowledge, experience, the right tools and machinery, and of course a lot of craftsmanship. Basically, all basics. 

But there is one theory I can cite as certain: The smaller the price and the bigger the promise of extra performance, the more dubious the offer. 

In this section, starting with the diagrams of two series-production motorcycles, we will simply plot performance curves and list the measures that led to the increase in power and torque.

Here you will find several performance curves of our tuning kits in comparison to each other. You can view the scope of the tuning stages in the engine-transmission service section under "Engine tuning packages".