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 Post subject: Twin injectors in S100
PostPosted: Wed Sep 26, 2018 1:50 pm 
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Joined: Thu Dec 14, 2017 4:40 pm
Posts: 11
Location: France
ECU Model: S100 Pro
Distributor: DTA UK
Firmware Version: 79
Hello

My plan is to turbocharge my Megabusa (hayabusa GEN1 engine)
I have a question concerning the twin injectors setup:
Do we need to get the same flowrate for the inner and outer injectors ?
I have 8x 270cc/min injectors but it may be a little short.

Thanks for your advice.

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Westfield Megabusa 1300 (Hayabusa powered Seven style kitcat and soon with DTA S100 ecu)


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 Post subject: Re: Twin injectors in S100
PostPosted: Wed Sep 26, 2018 1:54 pm 
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Joined: Tue Aug 02, 2011 12:08 pm
Posts: 2900
Location: Norn Iron
ECU Model: No ECU
It used to be best to do so...but now as you can blend the two sets of injectors any way you like, I dont think it really matters you could use small primaries and large secondaries.


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 Post subject: Re: Twin injectors in S100
PostPosted: Wed Sep 26, 2018 3:08 pm 
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Joined: Thu Sep 29, 2016 2:01 pm
Posts: 25
ECU Model: P8 Pro
As I get it you can only apply the dead times for the primery injectors so it is best to have the same injectors as primery and secondary.. their caracteristics should be as close as possible..

Injector dead times is the time it takes for the injectors to open (maybe close also. donĀ“t remember). That time changes to battery voltage and is different between different injectors.

If the wrong dead time compensation is used the air fuel ratio will change if voltage drop or increase from what is was when the engine was tuned.


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 Post subject: Re: Twin injectors in S100
PostPosted: Wed Sep 26, 2018 3:37 pm 
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Joined: Fri Feb 28, 2014 1:03 pm
Posts: 1116
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79
No necessarily.
Dead times are only relevant at low pulse widths, so as long as you ensure the secondaries aren't used at idle, and you're not using closed loop fueling, it will work fine


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 Post subject: Re: Twin injectors in S100
PostPosted: Sun Sep 30, 2018 1:54 pm 
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Joined: Thu Dec 14, 2017 4:40 pm
Posts: 11
Location: France
ECU Model: S100 Pro
Distributor: DTA UK
Firmware Version: 79
All

Thanks a lot for your answers.
I will start with 8 identical injectors then buy bigger upper when I run out of fuel.

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Westfield Megabusa 1300 (Hayabusa powered Seven style kitcat and soon with DTA S100 ecu)


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 Post subject: Re: Twin injectors in S100
PostPosted: Wed Oct 03, 2018 3:00 am 
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Joined: Sun Jan 27, 2013 6:08 pm
Posts: 262
ECU Model: S60 Pro
Firmware Version: 29
Those should comfortably do 400hp maybe 450hp at a push! I had 8x 205cc's make 370hp on my GSXR (they were max'd out though! LOL!)


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