Topic: The great throttle body size debate
So, for the past forever I have seen larger throttle bodies sold for cars in the aftermarket and a bunch of unsuspecting Jabroni's buying these in hoardes and patting themselves on the back for it.
So, does anybody actually know when/why we should change throttle body size? Nobody ever talks about it.
For example this is my particular situation:
I am converting the engine in the rolls to a DBW throttle body and I have many options to pick from. The stock throttle body is oval shaped with 2x65mm blades. The total bore area is 6636mm squared.
If I go to a single blade throttle body, here is an example of the total bore area of different sizes
108mm - 9160mm
102mm 8171mm
100mm - 7853mm
92mm - 6647mm
90mm 6361mm
So it looks like to retain the same Throttle body opening I need to shoot for the 92mm size.
Now would be a good time to either go up or down...but how the heck do you figure that out?
Where the smart guys at???
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