Well my 30# injectors are too small for me.

How would the drivability be with 42# injectors?

36#?

 

I would think any high impedance would be fine, especially when you actually need them w/ large flow rates. Tuning required, of course.

 

I am thinking of getting the racetronix 42# injectors for my le2 package. I know that they are more than i need but you can't beat them for the price and from what I understand, drivability would be great as long as you have a good tune.

 

Correct. A good tune is very important to any new combo.

 

I use 42lb lucas injectors I purchased from racetronix. Even tho it is advertised they need no tuning I found that the offset tables need to be tweaked for them to operate correctly. pretty simple tho.

 

on a similar note..i have two leaky fuel injectors..my buddy has a full set of 36#s..with correct tuning the car should drive the same?

 

All injector size / brand changes require that your PCM / ECM be retuned

 

My tuner, Jeff Creech, really likes the 42# injectors for tuning LT1's.

 

Let me rephrase that.

When I purchased them it was advertised that the delphi injectors require no Injector OFFSET modifications due to their ohms rating being similar to factory injectors. Obviously the CONSTANT must be changed when going to 42 lb injectors. I am not putting these injectors down at all, I love them, just stating that there may be some Voltage Offset adjustments needed in addition to the Constant chages. However the offset voltages may be more critical in a combination such as mine where all fuel learns by the PCM are disabled. Someone with Closed Loop operation may not be required to tune the offset table.

 

 

right off your website.

__
Part Number Delphi 01D030B (Lucas old 5208009, Lucas New 621031)
Static Flow Rate: 42.29 lb/hr @ 43.5PSI (300kPa) or 320gm/min
Static Flow Rate: 48.83 lb/hr @ 58.0PSI (300kPa) or 370gm/min
Dynamic Flow Rate: 9.96 gm/pulse - 2.5ms pulse width and 10ms repetition rate @ 43.5PSI
Coil Resistance: 15.9 Ohms / High Impedance / High-Z (No ECM driver modifications required)

Injector Constant changes are obvious when going to a larger injector. The last line there gives the assumption that not voltage changes are needed to the offset table due to the 15.9 ohms Hign Impedance rating. Atleast it does to someone with extensive tuning experience.

 

ECM drivers are a hardware item not a software / tuning related item!

 

ECM Driver to me means SOFTWARE. Guess thats what I get for dealing with computers on a daily basis. IF I update a hardware device DRIVER I am updating its SOFTWARE program that is used to operate the device.


All I said was offset voltages may need to be changed and its no big deal and you made a big deal about it.

 

No, not in the automotive world. Only in Bill Gate's world.
A driver is either a saturate driver for high impedance injectors or a peak and hold driver for low impedance injectors. There is no changing a driver via software on a ECM / PCM. We just want people to know the facts and not have them skewed by misinformation or misunderstanding. Anybody reading your post and not knowing any better could end up spreading the same misinformation. A good % of the info we post is to correct information that someone read or heard from someone else somewhere down the line.