To nie tylko obroty stanowia problem. Szybkosc, z jaka silnik przyspiesza tez jest wazna. Widzialem nawet silniki, ktore mialy valve float (plywanie zaworow) przy 3000. Wszystko, co zwieksza przyspieszenia silnika (szybkosc wkrecanie sie na obroty) wplywa na to (valve float), nawet zmniejszanie masy kola zamachowego !!!
The best example I can give is a friend's turbo T5 on a rolling road. Boost started at about 1 ATU. Max power was at 7500 and power was strong to over 8000rpm. As we increased the boost, finally to about 2 ATU the max the engine would pull was 6000rpm because of valve float. Springs were changed to larger Chevy type and the engine pulled again to over 8000rpm.
The best example I can give is a friend's turbo T5 on a rolling road. Boost started at about 1 ATU. Max power was at 7500 and power was strong to over 8000rpm. As we increased the boost, finally to about 2 ATU the max the engine would pull was 6000rpm because of valve float. Springs were changed to larger Chevy type and the engine pulled again to over 8000rpm.
