with multiple TBI's they would all fire at once...u can hook up to 3 TBI's to 1 computer module without a problem. so using the offy tri carb setup on the engine would be very good for something like that...How about the 2 outer TB's oked up in synch and the middle one as a progressive? that may be better for a larger power band and less off the line lag...when i bored out my carb, i had to enlarge thejet twice the size and set up the accelerater pump to shot a fair bit earlier...i think it would sorta be the same with the TBI setup...it would need a larger amount of fuel being shot and result in not too great gas mileage...any professional opinions?