Bridgetown - if you check post #6 by me, you'll see I contacted those guys last year, he gave me as much info as someone could for free.



Heh, I use NA for track and daily is FI


I'm trying to do more research via my only available option (the INTERNET), and watching as much as I can from various YT channels.
Now I understand that in some cases the engines are of course different but I imagine the principles are the same.
Currently going through Richard Holdener's vids, and on this one:

In layman's, TB size isn't particularly important for FI and certain SC but for NA bigger the better.
He also said that in regards to the elbow on an LS at least (around 55 min 15 sec mark), it doesn't matter if the TB is big enough to flow enough air for the power output, and of course that it is mated up to the entrance on the plenum equally sized (said various times throughout the vid).

Like all things NA, obviously intake/heads/cams/exhaust is all critical.
In my case my primaries from my headers might be a tad too big for the C8 cam's (I will probably try something different in a couple of years).