Thread: dual TBI ??

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i admit that i think too much but do you suppose its possible to run dual ' carbs ' with TBI kind of like the old dual quads. i know it would be completely unnessesary and take some thinking but it would be cool wouldn't it , and isn't that what its all about.

Originally posted by 53 Chevy5
i admit that i think too much but do you suppose its possible to run dual ' carbs ' with TBI kind of like the old dual quads. i know it would be completely unnessesary and take some thinking but it would be cool wouldn't it , and isn't that what its all about.

go for it all you need to do is mount another TB and tie into from the first TB. 4 wire hook up.

Chevy put some dual TBIs on Corvettes, Never seen one run realy well!

Originally posted by randywrench
Chevy put some dual TBIs on Corvettes, Never seen one run realy well!

never seen one, but with a computer and few sensers it should work.

Originally posted by randywrench
Chevy put some dual TBIs on Corvettes, Never seen one run realy well!

crap, it's been done before? oh well, never mind then. the pickup is going to be a daily driver mostly for the wife and if you say they didnt run too well i think i'll really forget about it.

GM called this system Crossfire fuel injection. Only used in 1983 and1984 corvettes I think they put them on F bodys one of them years.

Originally posted by 53 Chevy5
crap, it's been done before? oh well, never mind then. the pickup is going to be a daily driver mostly for the wife and if you say they didnt run too well i think i'll really forget about it.

you gonna make it run better

Originally posted by lt1s10
you gonna make it run better

was i suppose to send you something today chev. 5 ? if i was i did.

Originally posted by lt1s10
you gonna make it run better

with the help of your diagram, i hope so.

Originally posted by randywrench
GM called this system Crossfire fuel injection. Only used in 1983 and1984 corvettes I think they put them on F bodys one of them years.

did you get that guy stright on the vet randywrench ?

Originally posted by 53 Chevy5
with the help of your diagram, i hope so.

let me know when you get them.

Havent heard back from him, found out you only need the L wire hooked up to make it charge.

Originally posted by lt1s10
let me know when you get them.

will do, it wont be running as quickly as i'd hoped, going to get some work done on it. getting bored, ballanced, crank polished, seats in the heads. but then it'll be good for many miles.

Originally posted by randywrench
Havent heard back from him, found out you only need the L wire hooked up to make it charge.

thats what i couldnt understand with the interl. reg all you need is a ground for them to work.

I think that theres a reason that this system wouldn work too well. Remember, gm TBI style fuel injection is based on the o2 sensor and the crankshaft sensor. System runs rich, leans back the injectors, system runs lean, richens it out. Now, with one set of injectors there is an even draw from the set. However, with a dual set there is now 2 injectors per cylinder, each one covering 2 clyinders. As such, when the system registers a rich code, there is now two seperate systems to lean. But, if the engine has one set running correctly and one spraying too much, there is no way to compensate. Same applies if it is too lean. Simply put, "too many chefs ruin a soup" Were you to actually run this type of system, the best bet would be to run two independant manifolds for each se of injectors. Then run your O2 sensor for two cylinders on each bank. In effect, this would have the EFI setup of two V4s but the power, ignition and fuel economy of a V8. If Anyone follows me