Individual throttle bodies. How to size them?
Individual throttle bodies. How to size them?
(OP)
Hi
I’m looking for some guidance on building an individual throttle per cylinder setup for a street legal 60 degree V6 motor.
How should I size the throttle plates ? The motor has one intake valve and one exhaust valve, and electronic port fuel injection. The intake valve is 44mm. I’m assuming that the throttle plate should be sized in relation to the intake valve.
The big reason behind this project is my understanding that individual throttles give better throttle response. If this is not the case, I ‘d be interested in hearing why.
I’m looking for some guidance on building an individual throttle per cylinder setup for a street legal 60 degree V6 motor.
How should I size the throttle plates ? The motor has one intake valve and one exhaust valve, and electronic port fuel injection. The intake valve is 44mm. I’m assuming that the throttle plate should be sized in relation to the intake valve.
The big reason behind this project is my understanding that individual throttles give better throttle response. If this is not the case, I ‘d be interested in hearing why.





RE: Individual throttle bodies. How to size them?
MS
RE: Individual throttle bodies. How to size them?
That car was a Honda CRX with a B16A Honda V-tec motor with 4-42mm throttles. The big problems will come in the low speed low throttle angle driving. That motor would go to full torque any time below about 4000 RPM and about 15% throttle application. This all looks great at the car show but living with them is another story. Most of the HP fun will fade away when you try to build a effective air filter/ air box.
Andy
RE: Individual throttle bodies. How to size them?
There is going to be a definite relationship between intake valve size, and port cross sectional area, and that just about fixes the throttle diameter.
RE: Individual throttle bodies. How to size them?
((# of throttle bores) * (throttle bore in mm)squared)*.0575=horsepower
For more info, you might want to go here:
htt
and here
http://www.megasquirt.info/v22manual/minj.htm
hope this helps!