throttle body sizing Options

[ottox914]

Another question for the masses. After tearing things up this season on the auto x course, I find myself about 1-2 seconds behind the CSP winners at each event. And this on Falcon Azenis tires, with the fast guys bringing their hoosiers in on a trailer, while I drive to and from each event... With the 914 possibly going to DSP for next season, I'm thinking headers, Kuhmo 700's and dual throttle bodies with KitCarlson FI. All legal for CSP or DSP. I think the tires will make up most or all of the 1-2 seconds I'm back, but like most of you, I like to tinker with the teener.

So, given that for either class, the long block needs to be stock, (cam, pistons, valves, head, compression) what would be a good way to decide what size throttle bodies to get? In a quick search of TWM, Jenvey, redlineweber, there are sizes from 40 to 50+. While for the stock long block, anything over 50 would be huge, how do you figure between 40,42,44,45,48... I searched on carbs, and it seems carb guys w/basically stock motors run 40-44's. Keep in mind, the application is auto cross, so torque is more valuable than top end HP, and sharp throttle responce a must.

thanks again.

David Parsons
ottox914