I've recently talked about few turbo guys about similar decision (dual throttle bodies vs. dual plenums with single throttle body) and single throttle body won hands down. I don't yet have any personal experience with turboed edi's but should have next summer, hopefully I'm on the right track with the following arguments
![Smiley](http://cal-look.no/lounge/Smileys/default/smiley.gif)
Here's few reasons I've been told against dual throttle bodies:
- Controlling it with MAP is going to be difficult (plumbing MAP from 4-to-1 piping from each intake pipe, then again slower response for quick changes that has to be compensated with TPS)
- With mainly TPS based control, you'll need to compensate the boost somehow
- Need for linkage
- (sync should be easy with TPS's on both sides)
- Plumbing is way harder if you're not going to find readily available solution
- Needs more space, at least more height
Of course there's the brighter side also, for example
- Cool looks!
- Impressive n/a throttle response
- Maybe more top end power?
- Possibility to run injectors straight above the velocity stacks, too bad no-one can see them (...plenums made with windows?)
Dirty'n'cheap alternative:
- Strip your Dell's and plug gas holes
- Install TPS's to both carbs (now throttle bodies)
- Change or modify manifolds with injector seats
- As you have already the plumbing, linkage etc, only problem is going to be accurate enough measuring of the air going into engine
From my friends tale, I've reasoned that with n/a engine, TPS controlled EFI with dual throttle bodies is easier and accurate for very good results. Varying intake pressure makes it more difficult.