UnseenMenace
You a severley miss informed
Having only 1 bar Map sensor built in the ECU will mean there is a set Map upto 14.7psi
The sensor built into the ESCII ECU is a 2.5 bar unit, which can be mapped to 22.5 psi.
However this is not really an issue. The 5th inj uses it's owen external MAP sensor, such as a 3 bar used on a cossie. Together with an rpm input, you get full 3d mapping upto 2 bar of boost. I acutally used a 4bar sensor to give me mapping upto 3 bar of boost.
(Which cant supply equal amount of fuel to each port anyway)
As Daz has tried to explain, this is simply not an issue. The fuel is atomised with the inlet air as it leaves the injector. It has a VERY long path to reach the combustion chamber. This is highly desireable, as the mixture is very well homogenised by the time it reaches the ignition point. It also has a significant aircharge cooling effect similar to that of water injection.
Now, with this well mixed mixture
obviously an equal ratio of air/fuel will reach each port. It has to - why would the mixture fall out ? it can't - it has picked up lots of heat from the inlet tract and is well and truly mixed. What may happen, is that different amounts of charge will reach different cylinders. This is purely down to the design of the inlet manifold, and nothing to do with the injection system.
This can be overcome by management which can trim the pulse width for each cylinder. You need the expensive management, 4 EGT or ideally AFR sensors for each cylinder, and most importantly, somebody with the ability to spend DAYS mapping the car. Daz and I do this, but who else?
As cars running big power MF2. Well, the NMS cars did constand 13 sec quaters years ago now with 280hp. My own car has never melted anything, and was driven daily on an MF2 for 18months. Think 25 psi on a t34, and 40mpg cruise economy.
Rick.