90mm Throttlebody calculations and thoughts
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From: Port Tobacco, MD
90mm Throttlebody calculations and thoughts
Well, today was SLOW at work so I decided to play around with some stuff to see if I could calculate the difference between a 90mm and stock TB. I was am still not sure that the calculation will work but tonight will tell. I made a simple spread sheet to calculate how many cubic inches/mm/cm the 90/stock TB are open @ closed throttle and in degree increments the new area. It looks like the calculation will work as it closely follows the stock table. When I plotted the 2 tables side by side it showed that the 90mm TB's numbers were exactly 2.05 times bigger than the stock 75mm TB and needed a correction factor of .4869 across the board. Referencing that back to what everyone says about shifting the cells right, the calculation seems to be correct. Input is welcome.
Phil
Phil
Last edited by Phil99vette; 06-04-2005 at 02:58 PM.