gsxr 1000 injector wiring

[liltony1216]

Have anyone ever wired up a MS3pro on a gsxr 1000? I'm trying to figure out if I have my wiring correct to be able to run 8 injectors as primary. I have it wired A-1, B-2, C-4, D-3, E-1, F-2, G-4, and H-3.

[grom_e30]

not sure why you would run 8 primary when you can use staging and just run 4 then stage on to 8 when you need more fuel. they are wired correct for staging though.

[jdmckechnie]

wiring both sets of injectors for primary would decrease the injector pulse width TOOOO low? wouldnt it? makes for all sorts of idle and low throttle position issues... im pretty sure the secondary injectors are better off being staged to come on at higher engine loading. it gives the fuel more time to atomize and cool the incoming air stream, among other things. at low throttle angles and idle, your secondaries are going to be spraying in to almost still/non-moving air while your idle air control carries most of the air velocity. you could literally pool fuel behind the primary throttle and slurp it up unpredictably, which would make for all sorts of headaches.
id run the down streams as primary, and stage the secondary. just my 2 cents!
ive done this with a set of 07-08 tb's from a gsxr 1000 on my 1990 gsxr 750, and it works amazing. Besides the fact that the tb's are huge and i need a massive amount of throttle control until its up to 7000+ rpm, the staging works beautifully on MS, and when set up properly it delivers good results.

are you using the secondary throttles by any chance? ive been meaning to try and come up with a control algorithm (or find someone to help with one) to assist with maintaining a set manifold pressure per RPM.. im lazy and havent done anything with it yet..

[Matt Cramer]

If it has a 1-2-4-3 firing order, that's how you should set it up for staged injection. The E through H injectors will only be used if staged injection is enabled.