1 bbl TBIs for a GM 6 cylinder

[Bob Valentine]

Inline 6-cyl motors have inherent mixture wet-flow distribution problems
due to the unequal length from throttle location to the outboard cylinders,
probably the reason that most (all?) inline 6's use port injection.    

Since you didn't provide any details, I'm assuming your client has a 240
inline 6, with the intake cast into the head.  A hac'd 4-cylinder TBI bin
is the least of your problems.  

This isn't the "help me sell EFI conversions" list. 

-> Bob Valentine
-> bob at tecmark.com

At 08:02 PM 1/10/2001 EST, you wrote:
>Sorry, should have been clearer. I meant inline 6 engines. My thoughts are 
>that a 4 cyl TBI ECM fires the single injector every ignition pulse rather 
>than every other pulse. This would give two injector firings every rev. 
>However, with one injector having to supply 6 cylinders, you then have 3 
>firings every rev. It may be that a TBI injector cannot fire fast enough to 
>do 3 complete open/close cycles per rev. Even with a V8, an injector only 
>fires twice per rev. My client wants to use a 1 bbl on his Mustang due to 
>hood clearance. He feels that a 2 bbl TBI to 1 bbl adapter would cause the 
>TBI to hit the hood. To me, it sounds like an adapter is required either
way, 
>but its his car. I also think a bigger problem is a lack of a Tunercat tdf 
>file for a 4 cylinder 1 bbl ECM. JW
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