Injector Wiring

[hcmini1989 16]

only a quick question .wich way round have you wired your injectors ive just read that for an engine with the firing order 1 3 4 2 .they should be wired so that bank one cylinders 1+3 and bank two cylinders 2+4 .were as mine is running bank one cylinders 1+4 and bank to is 2+3 .so wich way is right

 

im running megasquirt 1 v3

[welshpug 1,662]

are you running sequential or batch injection?

[hcmini1989 16]

are you running sequential or batch injection?

 

currently simulataneos .but i was thinking of changing to alternating.to see if i can get it to run any better.

Edited December 15, 2009 by hcmini1989

[[L'e$kro] 2]

only a quick question .wich way round have you wired your injectors ive just read that for an engine with the firing order 1 3 4 2 .they should be wired so that bank one cylinders 1+3 and bank two cylinders 2+4 .were as mine is running bank one cylinders 1+4 and bank to is 2+3 .so wich way is right

 

im running megasquirt 1 v3

Cyl 1+2 and 3+4 for batch firing

Check on youtube videos on how a 4 cyl works with injection you'll understand why

Nicolas

[DrSarty 90 1 Cars]

' date='Dec 16 2009, 02:44 AM' post='1022051']

Cyl 1+2 and 3+4 for batch firing

Check on youtube videos on how a 4 cyl works with injection you'll understand why

Nicolas

 

Interesting.

 

I've seen both 1+2 & 3+4 and the (more usual) 1+4 & 2+3 configurations.

 

It's argued that even sequential fuel injection makes very little difference over batch fire, so perhaps you'd explain why the two different pairings above make any difference?

[petert 592]

It makes no difference. Either fire all four together, twice per engine cycle, or fire them sequentially, once each per cycle. All 205's and 1.9L Mi16 fire all four simultaneously, in a range of approx. 2.8ms to 7.5ms. The later 2L Mi16 fires once at approx. 5.6ms to 15ms per cycle

 

Think about how long one engine revolution takes at 7000rpm - 8.6ms. If you then factor in 85% duty cycle for the injector, that means you've got 7.3ms to get all the fuel delivered. So basically the injector is open all the time anyway at full noise.

 

Can a megasquat run sequential?

[Mad Professor 7]

A standard MegaSquirt with the MS1 or MS2 uP can only do batch or alternating fire only.

With the MS1 uP thats all you get, now with a mod'ed MS2 uP, extra hardware, and the lastest firmware you can run upto 4 injectors in full Seq Injection, but this is still in the very early testing stages.

To use full Seq Injection you must have both crank and cam sensors.

Edited December 16, 2009 by Mad Professor

[pugpete1108 62 1 Cars]

just run simultaneous injection and wire them up howerver you like

 

i think i wired mine 1+4 and 2+3 using 2 squirts per cycle and it seems ok? not run wot yet though