bigger injectors and fuel pump

[aaronr]

If the 42lb injectors are rated at 3 bar(like I am pretty sure they are) Your ifr table is wrong. Since you are running a vac referenced regulator you should have a constant value of 6.1107 at 58psi fuel rail pressure.

I'm not shore how you came up with that but here xls sheet i used.
info about the injectors.

Static flow @ 37.95lb/hr @ 43.5PSI / 300KPa (4.31 g/s = 398cc/min)
Static flow @ 43.82lb/hr @ 58PSI / 400KPa (4.97 g/s = 460cc/min) *
Dynamic flow (2.0ms/10.0 ms(pulse width / rep rate)) 6.0 lb/hr @ 43.5PSI (0.748 g/s @ 300KPa)
Coil Resistance: High Impedance / High-Z (Works with factory computer injector drivers)
Factory Tollerance: +/-5%
Connector: Multec 2 (Delphi)

[aaronr]

I would question whether the injector flow rate was calculated correctly if it was running fine before the injectors were replaced. There is an injectors.xls file floating around the internet that I have found quite helpful. Otherwise it was possible that someone previously had tuned the PCM with incorrect. If this is the case, you will have to run through the auto-ve again.

Where'd you find the waldo pump?

send me a pm and give some links to get the waldo pumps.

aaronr,
One time I was messing with my tune and I changed the Injector Flow Rates for a new racetronix fuel pump. When I did this it threw off my AFR.
One good thing about changing the IFR is that it was a constant value that gets adjusted. Once I changed it back to the flow rate that I wanted. I did a "short" AutoVE and then was able to use that data to tell the BEN factor that all the cells should have been off by. Then I changed the Main VE table with that factor for the daily driving cells (the ones that get 50+ hits during AutoVE). Then did a complete AutoVE so that I wasn't running around real rich/lean.

I don't know if that makes sense, I chopped it up a lot as I was typing. lol

I attached a excel spreadsheet that will help.

Excel spreadsheet --> USE THE ONE ATTACHED IN THE NEXT POST

-CoryF

I'll check out.

Okay so I decided to make the spreadsheet a little easier to understand. Let me start off by saying that I did not make this entire spreadsheet, I got it from another member and added more parts to it to help adjust the MainVE table when you change the Injector Flow Rates.

The new spreadsheet is quite simple and is a lot like the last one.

-The first table you paste your BEN's into (the only place you should paste)
-The second table tells what percent rich/lean each cell was
-The third is the "smoothed" value that you should paste into your MainVE table
-The forth is "new" follow the directions and it will either be populated with:

1. The average BEN Factor from the first table
OR
2. A set value that the user has predetermined

I hope this helps you dial in your AFR with a new IFR. PM or post up if you have any questions.

NEW Excel Spreadsheet ---> Attachment 4203

-CoryF

I'll check out.

[5.7ute]

Using that data IFR should be 5.5213 on both spreadsheets.( Mine is set up for fuel pressure logging so is a bit later version.)

[CoryF]

I'll check out.

I don't think I was on the right page as everyone else. lol So that might help you dial in the MainVE but if it has nothing to do with what your workin with just tuck it away on the ol hard drive and forget about it.

I created it because when I changed my flow rate I set the fuel pressure too high so the flow rates were a little high, then did like 2 hours of VE tuning. I didn't want that all to go to waste so I loaded in the new tune and did a log to find out that all of the cells were off by about .96** so I used that spreadsheet to change the cells back to a 1.0** BEN.
My theory behind the spreadsheet was that the IFR is used to calculate how long to hold the injector open for a certain amount of fuel. If someone were to over or underestimate the IRF values all the cells would be affected the same, therefor they can all be edited with the same factor.

Like I said if you can use it, it'll really help, but if not I tried hehehe

-CoryF

[nevinsb]

Which injectors are you using? The delphi 42LB injectors do not match those values:

http://www.racetronix.com/17113813.html
Delphi Part #17113813 (OE # 25324743)
Manufacture Specifications (using gasoline):
Static Flow Rate @ 43.5PSI / 300kPa : 42 lb/hr +/-5%
Static Flow Rate @ 58.0PSI / 400kPa : 48.5 lb/hr +/-5%
Dynamic Flow Rate @ 43.5PSI (300 KPa) = 0.945 gm/sec - 2.5ms pulse width @ 10ms repetition rate
Coil Resistance: 12.0 Ohms / High Impedance / High-Z (Will work with factory ECM/PCM drivers)
Factory Tollerance: +/-5%
Spray pattern / angle : Cone @ 21.9 degrees
Connector: Minitimer (Bosch EV1)
Body: Top-Feed Multec 1
Metering Technology : Ball/Seat Design with 6-Hole Diffuser Disc
Electrical Connector : Minitimer / EV1

[aaronr]

Which injectors are you using? The delphi 42LB injectors do not match those values:

http://www.racetronix.com/17113813.html
Delphi Part #17113813 (OE # 25324743)
Manufacture Specifications (using gasoline):
Static Flow Rate @ 43.5PSI / 300kPa : 42 lb/hr +/-5%
Static Flow Rate @ 58.0PSI / 400kPa : 48.5 lb/hr +/-5%
Dynamic Flow Rate @ 43.5PSI (300 KPa) = 0.945 gm/sec - 2.5ms pulse width @ 10ms repetition rate
Coil Resistance: 12.0 Ohms / High Impedance / High-Z (Will work with factory ECM/PCM drivers)
Factory Tollerance: +/-5%
Spray pattern / angle : Cone @ 21.9 degrees
Connector: Minitimer (Bosch EV1)
Body: Top-Feed Multec 1
Metering Technology : Ball/Seat Design with 6-Hole Diffuser Disc
Electrical Connector : Minitimer / EV1

Yes these are the injectors i'm using? What do you mean "The delphi 42LB injectors do not match those values:"

[aaronr]

Using that data IFR should be 5.5213 on both spreadsheets.( Mine is set up for fuel pressure logging so is a bit later version.)

More info.

[nevinsb]

AARONR:
Static flow @ 37.95lb/hr @ 43.5PSI / 300KPa (4.31 g/s = 398cc/min)
Static flow @ 43.82lb/hr @ 58PSI / 400KPa (4.97 g/s = 460cc/min) *

NEVINSB:
Static Flow Rate @ 43.5PSI / 300kPa : 42 lb/hr +/-5%
Static Flow Rate @ 58.0PSI / 400kPa : 48.5 lb/hr +/-5%


I was seeing significant differences between the flow rates listed at the same pressures, that's why I was trying to figure out which injectors you were using.

[joecar]

Arn't the 42 lbers rated at 43.5 psi...?

[aaronr]

Arn't the 42 lbers rated at 43.5 psi...?

where i bought my injectors they rated for this
Static flow @ 43.82lb/hr @ 58PSI / 400KPa (4.97 g/s = 460cc/min) *
Dynamic flow (2.0ms/10.0 ms(pulse width / rep rate)) 6.0 lb/hr @ 43.5PSI (0.748 g/s @ 300KPa)
Coil Resistance: High Impedance / High-Z (Works with factory computer injector drivers)
Factory Tollerance: +/-5%
Connector: Multec 2 (Delphi)