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Injector change


jimmylemon

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Hey guys,

Have recently changed injectors from bosch 2200cc CNG to siemens deka 2400cc. The 2200 CNG's were giving me dramas at high temps using e85.

Basically just wanting to know what I need to change in the menu just so I can get it running again and move it out of my garage, and possibly back down to tuners.

Tune file attached, any help at all would be awesome.

Cheers.

2630.pclr

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I wouldnt recommend the 2400 Deka's for a plug-in ECU.  The plug-ins only have saturated drivers so you would have to add ballast resistors and the dekas are pretty fussy with current.  You can make it work but there are probably easier options. 

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The factory ballast wont work, it will limit the current too much and those injectors get lazy if you limit them too much.  You will need to make a heat-sinked bank of 6, 2.2ohm, 50W resistors.   Something similar to this one that we make: https://dealers.linkecu.com/BAL6, except ours are only 4.7ohm, 25W so not suitable for these injectors.

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1ohm would probably work but the injectors may get hot internally so I dont know if it will be good for long term life.  I do know those injectors work ok with 2.2ohm so my suggestion is stick with the known.    

RS components stock check is not working when I checked, so I dont know which of these they have in stock, but here's 3 options all around similar prices:

https://au.rs-online.com/web/p/panel-mount-fixed-resistors/7205205

https://au.rs-online.com/web/p/panel-mount-fixed-resistors/7547288

https://au.rs-online.com/web/p/panel-mount-fixed-resistors/0158317

  

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  • 5 weeks later...

Hi Adam,

I ended up getting some 2.2 resistors, and have it all wired up now with the injectors in. I was just wondering if you might be able to crack open the .pclr file I have uploaded, and make the necessary changes for these injectors? I would be more than happy to pop some cash into a paypal account for you.

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If you are using modelled mode then of course you will have to enter the correct flow rate.  

If the injector supplier gave you dead times and short pulse width adder for your injectors and they tested them with the same saturated driver and ballast resistor then yes enter that correct info, but I highly doubt they have, so you will be better off leaving it alone and the tuner will have to determine the deadtimes experimentally.  Short pulse width adder cant be guessed, it needs to be done on a flow bench with the same driver that will be used on the engine.  Again if you dont have that info then best left at zero.

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  • 1 month later...

Just a follow up to say I used the arcol HS50 2.2's, worked a treat. Just lopped off the connector from the factory dropping resistor, then wired them all into that, used a metal box from jaycar as the enclosure. Just plugs into existing loom now. Ended up doing 896whp, no ill side effects from what the tuner could see.

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