scaling ifr table
#12
thanks for the help what I did was to scale the injectors like this based off
Injector Rated Fuel Pressure: 58
Your Fuel Rail Pressure: 58 (this varies so I just took a mean value)
Injector Rated Flow Rate 30
kpa
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
ifr
30.00052906 30.18750146 30.37332291 30.55801442 30.74159634 30.92408844 31.1055099 31.28587935 31.46521487 31.64353405 31.82085397 31.99719125 32.17256204 32.34698206 32.52046662 32.69303059 32.86468849
at wot it got the inj down to 17.5 ms which is what it is running SD puts me between 85 to 100% duty cycle depending on where I shift which isnt the best but its better than 120% which is what I was at with the stock 5.3 25lbers
this maf is a mother to tune and it reaks havoc on everything else its a saint and a devil at the same time I can run more timing and get better times and mpg with it but its such a PITA to tune anything with it on. My inj pulse width is an example of that.
thanks again for the input
Injector Rated Fuel Pressure: 58
Your Fuel Rail Pressure: 58 (this varies so I just took a mean value)
Injector Rated Flow Rate 30
kpa
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
ifr
30.00052906 30.18750146 30.37332291 30.55801442 30.74159634 30.92408844 31.1055099 31.28587935 31.46521487 31.64353405 31.82085397 31.99719125 32.17256204 32.34698206 32.52046662 32.69303059 32.86468849
at wot it got the inj down to 17.5 ms which is what it is running SD puts me between 85 to 100% duty cycle depending on where I shift which isnt the best but its better than 120% which is what I was at with the stock 5.3 25lbers
this maf is a mother to tune and it reaks havoc on everything else its a saint and a devil at the same time I can run more timing and get better times and mpg with it but its such a PITA to tune anything with it on. My inj pulse width is an example of that.
thanks again for the input
#13
I AM A MOTHERF*CKER
iTrader: (1)
Originally Posted by 02sierraz71_5.3
are there any benefits to scaling them?
I have noticed I get higher inj pulse widths wot running a tuned maf vs SD I dont have enough knowledge to put it all together but was thinking the ifr table could help keep the wot pulse widths lower with it being scaled. Im getting the same pulse width with these 30lbers as I was with the 25lbers,WTF? I tried retuning the maf and thats not the issue its dead on as is my ve table. So why is it that my pulse width is lower running SD vs maf?
I have noticed I get higher inj pulse widths wot running a tuned maf vs SD I dont have enough knowledge to put it all together but was thinking the ifr table could help keep the wot pulse widths lower with it being scaled. Im getting the same pulse width with these 30lbers as I was with the 25lbers,WTF? I tried retuning the maf and thats not the issue its dead on as is my ve table. So why is it that my pulse width is lower running SD vs maf?
If you have a vacuum referenced regulator, *do not* build the curve. The curve is for returnless fuel systems, that do not have a vac ref'd regulator. The VRR makes the same curve when you need it based on vacuum / boost.
#14
Originally Posted by TurboBerserker
If you have a vacuum referenced regulator, *do not* build the curve. The curve is for returnless fuel systems, that do not have a vac ref'd regulator. The VRR makes the same curve when you need it based on vacuum / boost.
Thread
Thread Starter
Forum
Replies
Last Post
Vortec350ss
Drag Racing
134
01-12-2016 10:36 PM
legerwn
Tuning, Diagnostics, Electronics, and Wiring
56
11-15-2015 10:21 PM
Tydriver
GM Engine & Exhaust Performance
45
10-23-2015 09:19 PM