stock injectors
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Newbie
Joined: Jan 2004
Posts: 86
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From: Richmond VA
Originally posted by Deceit
you're thinking of a narrowband?
you're thinking of a narrowband?
do you guys think it'd be alright if i just put a narrow one in and just watched to make sure it didn't go in lean?
Thanks
Ben
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Joined: Jun 2010
Posts: 84
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From: Dallas
However, my concern with high duty cycles is the ability for the ecu to increase pulse width further to compensate for environmental conditions. Example if you tune for 90% duty at 70 degrees and then you try to run it hard in 30 degree temps you're probably going to max out the injector and could run lean. It doesn't give you enough head room.
Not to argue but I don't see how duty cycle hurts an injector. At 100% they are held open which would probably cause more heat soak into the injector but its not that much. Hondata tested this and with stock low-z injectors with a resistor box the injectors only reached 40c being held open for 3 minutes
However, my concern with high duty cycles is the ability for the ecu to increase pulse width further to compensate for environmental conditions. Example if you tune for 90% duty at 70 degrees and then you try to run it hard in 30 degree temps you're probably going to max out the injector and could run lean. It doesn't give you enough head room.
However, my concern with high duty cycles is the ability for the ecu to increase pulse width further to compensate for environmental conditions. Example if you tune for 90% duty at 70 degrees and then you try to run it hard in 30 degree temps you're probably going to max out the injector and could run lean. It doesn't give you enough head room.
...I'm just sayin'
The stock EVO injectors are 560 cc actually.
We have made 361 whp and 303 ft lbs. The car ran a 12.09 at 115 mph on 94 octane like this.
The stock injectors with a pump upgrade should be able to make over 400 whp in the car with the correct tuning.
David Buschur
www.buschurracing.com
We have made 361 whp and 303 ft lbs. The car ran a 12.09 at 115 mph on 94 octane like this.
The stock injectors with a pump upgrade should be able to make over 400 whp in the car with the correct tuning.
David Buschur
www.buschurracing.com
Any more, you really have to run a comb through some of the posts people make on here.
Newbie
Joined: Jul 2007
Posts: 17
Likes: 0
From: Greece, Athens
Can someone help me cause I am a little confused.
I have an EVO ix with stock turbo,stock injectors plus kelford 272 and walbro 255 pump.
My tuner tuned the car in a maha lps3000 dynometer and the car made 440 at the crank with 1.8(27 psi) over tapering to 1.55(23 psi) at 8000 rpm.
The afr is 11:1 from 6000 all the way to redline.
I do not know the injectors duty cycle.
Today a friend of mine tuned his car. Same specs but without the cams. Same fuel same everything but another tuner. At the same boost level and with afr 11.8:1 the tuner told my friend that they run out of fuel.
Is this possible?
With out cams and already maxing stock injectors?
What is the horsepower stock injectors can deliver;
Thanks.
I have an EVO ix with stock turbo,stock injectors plus kelford 272 and walbro 255 pump.
My tuner tuned the car in a maha lps3000 dynometer and the car made 440 at the crank with 1.8(27 psi) over tapering to 1.55(23 psi) at 8000 rpm.
The afr is 11:1 from 6000 all the way to redline.
I do not know the injectors duty cycle.
Today a friend of mine tuned his car. Same specs but without the cams. Same fuel same everything but another tuner. At the same boost level and with afr 11.8:1 the tuner told my friend that they run out of fuel.
Is this possible?
With out cams and already maxing stock injectors?
What is the horsepower stock injectors can deliver;
Thanks.
Last edited by 106rallye; Apr 16, 2011 at 11:50 PM.