I've got a theoretical question here. Would it be possible to use a stock-type throttle body with a stand-alone system like the Holley 950 or the Tec3?

I ask because I am planning a wierd custom build-up. I am trying to build an EFI version of a Tri-Power intake, using an Edelbrock/Offy 3x2 manifold and three TPI throttlebodies. As I see it, only one throttlebody needs to retain it's electronics, and the rest will just be stripped down to the butterflies.

I know that there's no real performance gain between a 3x2 and a big 4-bbl, but I'm going for a custom look, in homage to the Tri-Power Pontiacs of the '60s.
The engine will be in the 383-400 ci range, so it won't be looking at real high revs. I'm looking at a 389 with a 6" rod, but that may prove to be too expensive, and I may settle for a 383 or 400.

Most of the fabrication I can handle, but I want to know if I can make the electronics work. Any thoughts/suggestions are welcome.

 

I like the idea

don't see why it wouldn't work

as long as the TB are synced the ecm will know the throttle angle

and the map will tell it every thing else

but it should be real touchy on tuning and at tip in of the gas.

about like tuning for a mono blade TB

maybe a little worse

 

This is just an idea, I don't know if it would work, but, what if you left all six injectors in place, (2 in each TBI unit) and used an ECM and wiring harness from a multi-port V-6 like a 3.8 or somthing, and wired each injector to each plug on the 3.8 wiring harness. Use a wiring harness and ECM from a 1985 front drive Delta 88 because it still used a distributor. A distributor from say a 1985 car or truck that has a small block chevy and uses the same chip under the cap. Then use one throttle position sensor, and wire it to the harness where it should be. Buy an aftermarket inline fuel psi regulator, and bypass the regulators on the TBI units. This way you could get the psi to be the same on all six injectors. After all that the only thing that would be critical would be the throttle position senser, (would it talk properly to the computer? I think it would, I have seen similer stuff done with a Corvette TPS put on a Caddy 5.0) also your fuel psi would be critical too and you would have to get that right through trial and error.

I almost want to try this myself.

Hey, this all came to me in a passing thought but, but it just might work.

 

Can it work?.
Probably, but it's gonna take some serious effort.
Unless the manifold has some common channeling, then you'll need to work out getting all three IACs to synch. If you want to run without the IACs, again there are other problems. ie no choke, and no dash pot.

You'll need to seriously investigate the software of the different ecms your want to use. Better yet get to some events where folks are using the different aftermarkets and see them in action. Reading about them is a really poor second place compared to walking thur the system with someone running one.

 

Well, I've been lookin in to this, and it seems a little nuts to try the first time out. Not to mention, a little expensive. Thanks for all the input, guys. I think i'm gonna get some more 'stock' FI experience before I tackle something custom like this.