Originally Posted by
Maximo
you are very wrong to think that a engine will make its best power on a 7mm insert..... 7 and 8 mm do not make as much power as a 9mm........ as well the power drop off from 8-7 mm is much bigger then you realize, just 1 mm can result in as much as a 20% loss of peak power as well as a substantial loss in peak RPM ...and yes the 7mm venturi makes the tuning window narrower and the engines will end up on average having shorter lifespans...all the rules did was slow the cars down and the racing is no cheaper then it was before
I never said it would make its best power with a 7mm, thats not what i meant but a modded 7mm can make more power than a non modded engine with a larger venturi. I have seen it first hand
i have a hard time seeing a 1mm rstriction equaling 20%, you have a dyno sheet to verify this?
We will agree to disagree on the lifespan subject....
The rule did not slow the class down at all. Last race i had a very hard time keeping up with a modded MITO, in fact he had more top end than i did with a non modded 9port/8mm. before the rule most did not bother modding engiens we just all ran 9ports but now if you want to keep up with the elite you have to have a modded 5port which is faster! At least thats my logic and what i have experienced here lately anyway!