FREQUENTLY ASKED QUESTIONS
Will you regrind my original cam or manufacture a new piece?
We design a suitable cam shape according to the requirements for changing the engine characteristics.
The sportier and more powerful the engine is meant to be, the wider the lift curve will be. Generally, for engines for regular operation, the original camshaft can usually be modified by regrinding. For sportier cars, a new shaft must be manufactured because stock cam lobes do not have "enough material" from which the desired shape could be achieved by regrinding.
What is a "sharp cam"?
In practice, the term "sharp cam" (ostrá vačka) has become popular to designate sports cams. In reality, so-called race cams have a plumper profile because they must ensure a longer opening time for both the intake and exhaust valves. Longer valve opening leads to better exhaust gas scavenging and intake of a larger amount of fresh air (or air-fuel mixture) into the cylinder. And it is precisely the amount of fresh air drawn into the engine that has a fundamental influence on its performance.
Paradoxically, a stock cam looks "sharper" to the eye than a modified "race cam".
Is a new camshaft enough to increase engine power?
We design the camshaft specifically for your engine, with regard to the power increase you require.
To achieve the desired effect, the camshaft must be correctly positioned during assembly. An essential part of installing a new camshaft is also adjusting the compression ratio. To ensure smooth operation and high durability, valve clearances must be set correctly. You will receive all these assembly parameters from us along with the camshaft, and they must be adhered to. Ideally, it is appropriate to also adjust the fuel delivery and ignition advance value (for spark-ignition engines) for the modified camshaft.
For light touring modifications of newer vehicles, it is not necessary to interfere with the ECU SW. The unit can adapt to a certain extent on its own and adjust the fuel delivery to achieve the required air-fuel ratio.
For sports engines, where the characteristics change significantly, we recommend also performing an optimization of the ECU SW.
For older carbureted engines, we highly recommend sending the carburetor and distributor along with the camshaft for modification.
I bought a sports cam, but the engine power didn't increase. Can you help me?
We will measure your camshaft on a special mechanical-optical device with an accuracy of 0.00001 mm. We will perform an analysis and assess whether the given cam profile is suitable for your engine. If so, we will propose the optimal timing, compression ratio, and valve clearance values for this cam.
If a cam worked perfectly on one engine, it doesn't mean it will also work on your engine. It is not enough to know just the cam duration and maximum lift; it is necessary to choose a suitable course of the entire lift curve. And that is why it is necessary to design cams for each engine individually.
