Two words that will make nearly any throttle body fit any manifold: ADAPTER PLATE.
Adobe is right about the "matching" aspect of air flow versus instantaeous fuel delivery. Simply bolting on a TPS to whatever T/B you conjure up will NOT guarantee that the fuel delivery curve will be correct.
Frankly, with a home brew T/B, you won't have a clue as to how much air is flowing at any time which means that you won't be able to meter fuel accordingly unless you are on a well instrumented dyno. Too rich or too lean and you'll hurt parts.
Engines like you plan to build have to be dialed in on a dyno at many throttle and load settings. You could try to do it at the track but that is beyond a SWAG - it is a flat a$$ guess.
Either way will require a lot of time and money and an on track process will probably result in lots of broken parts and/or an engine that will run like a pig.
At one time, you could bolt on a carburetor and change some jets - at least they'd reasonably flow fuel in proportion to air flow.
However with EFI, you squirt fuel in whether the engine needs it, wants it or not. Thus, you have to acually tailor the fuel curve yourself - this is often beyond the ability of the seat of the pants, novice engine tuner.
Before you get too far out on a limb, you might want to hang around the Megasquirt website for a while. A lot of the DIY EFI issues you WILL be facing are addressed by the folks who use the Megasquirt EFI controller. You could learn a LOT hanging around there.
Using visual SWAG's to 'design' a throttle body is a recipe for an unhappy experience that could easily evolve into an unmitigated disaster.
Get the engine to run and do run smoothly before you try to run monster T/B's or other go fast goodies. You can only develop so many unknowns at once before stuff overwhelms you.
in closing, just because something big 'fits', that doesn't mean that it will 'work'.  |