TWM 8 stack plenum too small?

[jab]

Fred,
After being totally frustrated, feeling like the Lone Ranger and not aware this forum had a section on fuel injection with a wealth of knowledge or I would have posted a long time ago. I flat bedded the car to a tuner with a dyno to set it up this week. The tuner claims the problem is that TWM's stock plenum is way too small, and is fabricating an external plenum as we speak, and is also fitting larger hoses for the IAC and stock plenum. He also contacted TWM to see whether they had a larger plenum and was told no, but they agreed with him that with the size of my engine and the cam, that it needed a larger plenum. I found this a little hard to swallow that no one else encountered this problem, and why, if TWM was aware of this, they haven't addressed it. I'm still a little skeptical that this is needed. I do feel a lot better knowing that you guys have my back and can get an intelligent response, as opposed to "put a carburetor on it..." Jim