Injector duty cycle question
Thread Starter
Safety Car
Joined: Sep 2002
Posts: 4,030
Likes: 6
From: Maryland
Injector duty cycle question
Guys,
Wanted to check this one last time before dynoing:
I have stock injectors, headers on my heads/cam/exhaust modded '93 car. I want an acceptable injector duty cycle when ROAD RACING (so I don't blow the stock injectors up).
Is the following a good(sound) way to manage injector duty cycle:
--Install AFPR, go to dyno, check duty cycle and air/fuel ratio, make minor adjustments, re-burn chip to fix possible rich idle.
Or: Must I purchase need new, bigger injectors?
Thanks!!!
Wanted to check this one last time before dynoing:
I have stock injectors, headers on my heads/cam/exhaust modded '93 car. I want an acceptable injector duty cycle when ROAD RACING (so I don't blow the stock injectors up).
Is the following a good(sound) way to manage injector duty cycle:
--Install AFPR, go to dyno, check duty cycle and air/fuel ratio, make minor adjustments, re-burn chip to fix possible rich idle.
Or: Must I purchase need new, bigger injectors?
Thanks!!!
Le Mans Master
Joined: Nov 2002
Posts: 7,080
Likes: 0
From: Corvette valley Georgia
St. Jude Donor '06
Re: Injector duty cycle question (sothpaw2)
I used my scan tool ( my lap top ) and recorded a full throttel run and my duty cycle is @ 75% which I understand is good.
Now as I undestand anything over 85% is to much and you will need bigger sized injectors.
Now as I undestand anything over 85% is to much and you will need bigger sized injectors.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Injector duty cycle question (grapeknutz)
The scan tool will also show if the ECM can still compensate when in closed loop from BLM cell values as well as Integrator value.
And you can even pre-tweak the fuel pressure till you have WOT O2 readings of ~900mV or so and then take a look at closed loop values. This will allow you to go onto the dyno pretty close to optimum and assured that the injectors will be big enough.
And you can even pre-tweak the fuel pressure till you have WOT O2 readings of ~900mV or so and then take a look at closed loop values. This will allow you to go onto the dyno pretty close to optimum and assured that the injectors will be big enough.
Thread Starter
Safety Car
Joined: Sep 2002
Posts: 4,030
Likes: 6
From: Maryland
Re: Injector duty cycle question (65Z01)
Does anybody know of someone who runs stock injectors w/ heads/cam package, and road races?
Thanks for the replies, I will do that, 65Z01. I take it the dyno place can tweek the pressure first.
Thanks for the replies, I will do that, 65Z01. I take it the dyno place can tweek the pressure first.
