It is wise to build a street car for VE? Can it be done? How?

 

i recomend building everything for a high v.e. how is alot of explaination though. too much typing for me.

 

you want every motor you have to have high efficency... its good for economy and power.....


how you go about doing it is the question...


athough i think you're talking about making your motor tweaked out to run near (or even over) 100% VE at 6500-7k probly means the car is going to be very inefficent outside that range.. like in low RPM street driving..

 

So VE up high is the enemy of VE down low? So can VE be achieved at any appreciable point where its benefits could be realized on the street?

 

no.
not all the time.


for example, a roots blown motor can have over 100% VE everywhere...


or a properly chosen modern cam can work over a broder range then a old school one...


its just harder to make the motor work over a broder range then in one small specific one. harder, not impossible.

 

This almost makes it sound like it could be directly related to cam choice.

 

more like the engine as a whole, but yes the cam has alot to do with where its efficent......

 

I suppose that it is limited by the part of the system that flows the least cfm. So if one could match the whole system to a flow number and then time the whole thing to get that flow then it would be achieved. I can see where the broad range aspect comes into play. Too bad we can take advantage of variable valve timing.

How closely to the various parts flow anyway? What typically is the weakest link?