Hia mate!
Crap! (I totally missed this thread....what a 'Goober')
....
just a few of comments to add (without the quotes...sorry) i hope they're usefull
You asked about even distribution... yes thats the same (or very similar) AMMOUNTS & MIXTURES set to each of the 4 cylinders....if all are uneven ammounts but all on the rich side then theres no major problem apart from you may not get the best efficiency/performance....but if the MIXTURE is un even....then there is the worry that one or more cylinders going lean (POP BANG <backfire, or worse spark plug smashed, or worse valve / piston / inlet damage...or worse still....LOL) :-(..I have only had one glance at the K11 inlet, and if i recall each the runners are slightly different lengths and take different routes (have different bends) <as well as dipping down and back up again>.
Lean can easily cause permenant dammage....
Rich will reduce best performance (but will still be a fun boost that will make you grin.
Extreemly rich will cause problems (missfire, plug soot fouling and stalling) but a quick plug change / cleen will get you rinning perfectly again.
The problem with dips in the runners that have to go back up again is that fuel can drop out of the nitrous mixture and you move towards lean....but as others have said, a direct port will reduce this problem.
I'm not sure if the K11 inlet is as restrictive as the K10 one...but if this is a potential area for N/A - Off gas tuning then it would be my first port of call if I was looking forward to a enjoying a reliable and fun nitrous setup....woud this be possible? (a custom, equal inlet manifold)
I DONT think the stock ECU AFR fluctuations will be a major problem...since its a wet kit you can chose slightly rich enrichment jet and know you are safe here.
the position of LPG (fuel) and nitrous (oxidiser <like air>) cant be compaired directly, mainly because the temperature drop caused by the emitted liquid nitrous turning to gas is much larger than any temperature drop caused by evaporating LPG
I have got to say this subject is HUGE and FUN
If you want the most reliable nitrous kit then it has to be Wizards of NOS, since all of their components are designed from scratch for nitrous use and high reliabillity. the 'rest' of the kit types are all the same industrial kit with different labels :-(....so if you end up getting stuck right in to this sort of thing then I can reccommend switching kits too. they cost more.....but much less in comparrison with a dead K11 caused by kit failure.
You WOULD NOT BELEIVE THE LEVEL OF CUSTOMER SUPPORT Wizards of NOS give to all their customers......and ANYONE is welcome into their forum too
check it out:
http://forum.nitrous-advice.org/viewtopic.php?f=6&t=2799&hilit=nossan
sorry im late with this but i hope some of it is usefull
good luck matey!!!
Oh One more thing to add (sorry)
the quallity of the installation has to be very good no mater which kit you have....and in my oppinion, in the DIY community, this is the biggest area of risk.....for example....the fuel enrichment solenoid electrical connections are made.....but due to in adequare support, the wire breaks after being vibrated for a period by the running engine.........->lots of nitrous......no extra fuel.....catastrophe...lol....