Bobby
Tunercat injector flow rate
4th Gear
Joined: May 2005
Posts: 4
Likes: 0
From: Cooper City FL
simple green,
I just went back through my post looking for a link to something that explains they WHY, and I see I didn't put any in there. I only posted the how. If you do indeed have Bosch injectors, you might be SOL on the numbers you need and will just be stuck with the trial and error method. Personally, I would consider peddling them and grabbing a set that the data is available for...which is exactly the reason I chose the SD 63# injectors.
Get ready for more head spinning, because this is the required reading on the subject:
http://calibratedsuccess.com/Assets/...%20Article.pdf
http://www.teamzr1.com/ubbthreads/ub...at&Number=2794
Expect to read each of those more than once.
If you are referring to the "Injector Offset vs. Batter Voltage" table in TunerCat, then it is merely the number of microseconds the PCM thinks the injectors take to be fully open and close. More voltage means they operate faster. Obviously the only part of the curve that really matters when the car is running is 11.5-13v range.
I just went back through my post looking for a link to something that explains they WHY, and I see I didn't put any in there. I only posted the how. If you do indeed have Bosch injectors, you might be SOL on the numbers you need and will just be stuck with the trial and error method. Personally, I would consider peddling them and grabbing a set that the data is available for...which is exactly the reason I chose the SD 63# injectors.
Get ready for more head spinning, because this is the required reading on the subject:
http://calibratedsuccess.com/Assets/...%20Article.pdf
http://www.teamzr1.com/ubbthreads/ub...at&Number=2794
Expect to read each of those more than once.
If you are referring to the "Injector Offset vs. Batter Voltage" table in TunerCat, then it is merely the number of microseconds the PCM thinks the injectors take to be fully open and close. More voltage means they operate faster. Obviously the only part of the curve that really matters when the car is running is 11.5-13v range.
Thread Starter
Racer
Joined: Feb 2008
Posts: 269
Likes: 0
From: Victoria British Columbia
many things will change at that large of a jump.. what is your base fuel pressure set at? the battery voltage tables may also play a part.. the higher the voltage the better injectors respond especially highZ units. may try changing this table some as well.
You then adjust your MAS (mass air flow tables) to adjust for incorrect BLM's.
Thanks
Safety Car
Joined: Sep 2001
Posts: 4,154
Likes: 553
From: Glenbeulah Wi
Burning Brakes
Joined: Jan 2002
Posts: 1,228
Likes: 1
From: Dallas Texas
I have a question about the MAF [referred to as MAS in this thread]- isn't adjusting the values in the tables as much of a hack as adjusting the injector constant when tuning BLMs? My novice understanding of those tables is that they are the calibration of the sensor; it's converts airflow to a frequency [remains constant]. So doesn't that also feed inaccurate information to the PCM? Is this just a means to an end that offers finer control over simply adjusting the injector constant?
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