Originally Posted by
na200whp
Yes ,drag engines are designed around power in the upper rpm range and autocross need a balance of mid and high rpm. Yet they can both use the same size T/B.I guess what we need to determine is what is considered big. I personally fell 68-70mm is big. 72 & up is huge for most hondas. I dont think you would see or fell any difference from a 68mm to 70mm t/b if switched.
My last sentence was "your results may vary"....and for good reason. I was talking about sheer volume of air going through an engine at top end at Daytona, versus a smaller volume of air during acceleration at an autocross.
Floor the gas with a smaller carb and smaller intake runners and it will accelerate sooner than flooring the gas with a huge carb and huge runners. Hugh openings will likely "cough" and then start accelerating......
Your post causes me to think that you are talking about drag racing which is not constant top end, versus autocrossing....usually not at constant top end, as well as not reaching and holding top end.......but reality is that if by testing, a person finds the right combination, for whatever they are doing, it cannot be denied that the combination works.........but until something is developed and tested, everyone has an opinion. Thanks for posting.-Bob
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If we were to explore this further,
Hugh turbo chargers will give you greater top end but smaller turbos will give you better acceleration according to some people......and some people say that if you put a huge turbo charger on a small engine, that it will be unable to use a huge volume of air and will run worse......