Injector duty cycle.. datamaster incorrect?
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Race Director
Joined: Nov 2000
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From: stop the fun suckers
Injector duty cycle.. datamaster incorrect?
I noticed datamaster calculates the injector duty cycle.. does anyone know how this is done? also, how accurate have you found it to be?
Team Owner
Joined: Mar 2000
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From: Boston, MA
Re: Injector duty cycle.. datamaster incorrect? (BluByU)
Dutycycle....
Batchfire: (Early L98s)
(Pulsewidth * RPM ) / 600 = DC
Sequential: (Late L98s I think, LT1s, etc)
(Pulsewidth * RPM ) / 1200 = DC
Batchfire: (Early L98s)
(Pulsewidth * RPM ) / 600 = DC
Sequential: (Late L98s I think, LT1s, etc)
(Pulsewidth * RPM ) / 1200 = DC
Thread Starter
Race Director
Joined: Nov 2000
Posts: 17,103
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From: stop the fun suckers
Re: Injector duty cycle.. datamaster incorrect? (scorp508)
i'm batch fire (early LT1's).. anyways, i calculated what i have..
(BPW*RPM)/600 = inj DC according to scorp...
bpw=10.79
rpm=5525
that gives me
(10.79*5525)/600 = 99.3%!!! :eek: :eek:
is this bad for my injectors? how can i fix this.. i jsut emaijled my chip burner and he said as lojng as fuel is getting to the engine done worry about it.. however, this sounds like its going to beat up my injectors!!
what now?
(BPW*RPM)/600 = inj DC according to scorp...
bpw=10.79
rpm=5525
that gives me
(10.79*5525)/600 = 99.3%!!! :eek: :eek:
is this bad for my injectors? how can i fix this.. i jsut emaijled my chip burner and he said as lojng as fuel is getting to the engine done worry about it.. however, this sounds like its going to beat up my injectors!!
what now?
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: Injector duty cycle.. datamaster incorrect? (BluByU)
You've basically gone static at that point and lost fuel control as the injecotrs are just hanging open all the time dumping in as much as possible.
You could raise your fuel pressure and lower the amount of fuel the chip puts in try try and get a lower pulsewidth to achieve a DC of around 80%.
You could raise your fuel pressure and lower the amount of fuel the chip puts in try try and get a lower pulsewidth to achieve a DC of around 80%.
Thread Starter
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
Re: Injector duty cycle.. datamaster incorrect? (scorp508)
i jsut emailed my tuner back asking about that question.. i'm curious what his answer will be..
does 99% DC lead to inj failure?
does 99% DC lead to inj failure?
