Thanks again for the clarification on the head shim situation. OK, the Nova 41022 is the non conical manifold. This would be kind of a last resort because it will have a huge impact on power...

Next time I will try the JP 2031 exhaust which I normally use when mileage becomes an issue. In my group most guys run Picco or Max engines and they have power and runtime with their normal (full power) exhaust systems. Novarossi engines (the 14.5mm crank types) still consume too much fuel
As we do 5mins heats you will not be in the top ten with a splash...

In the Swiss national championships the drivers are segregated into two groups depending on prior years performance. Top runners of group A were on worlds level (some of those drivers attended the worlds last year). Lap times were down to 19.9 on a sub perfect track (Rain til early afternoon). In that group we also talk about serious hp with Nova works engines and so on. Btw, the race was won with a Murnan power plant...

In my group you had to run consistently around 21.5 to be in front. I did some 21īs but not consisently enough. In this group most guys run out of the box engines with some modified MaxPower and Piccos.
Next time I will raise the head on my engine because I was doing well through the corners but lost on the straight. Some more revs would certainly help...

Thanks again and til next time!