Anyone running 2 sets of injectors? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

2muchboost · 07-06-2012, 09:03 AM

So I have been doing a little bit of research to get a better understanding of how to properly run 2 sets of injectors. The theory is that a smaller set of "primary" injectors are used under normal driving conditions and a set of "secondary" injectors are setup to kick in at a programmed rpm/boost level/spark....etc.

This concept interests me for a number of reasons but one being fuel consumption and driveability. In the future I will be using my car 2-3 times a week to commute to work (70+ miles a day) in order to give my poor daily a rest. It would be awesome if I could keep close to stock mpg when driving the car under normal conditions and then have a set of upgraded injectors kick in when they are truly needed at which point I would watch my mpg disappear.

I would like to hear from anyone that has done this and what their experience has been like...both good and bad. To be honest I am not hell bent on keeping good mpg on my 240sx because I have a daily but if I could set the car up with a setup like this then I would be interested in possibly doing so.

FYI if anyone cares to know, the setup would be controlled by a Pro Efi 128 unit since its already waiting to be installed.

I have posted a link to SF where one of the members a different setup with his RB30 swap and so far has had great success. I frequently talk to the member there but am interested if anyone here has some insight to further the knowledge. He is running a Walbro 255 at "low" demand and a Bosch 044 under "high" demand.

Supraforums.com

PS: Mods if this is in the wrong section please feel free to move.

07-06-2012, 09:03 AM	#1
2muchboost Nissanaholic! Join Date: Apr 2003 Location: Austin, TX Age: 41 Posts: 2,183 Trader Rating: (33) Feedback Score: 33 reviews	Anyone running 2 sets of injectors? So I have been doing a little bit of research to get a better understanding of how to properly run 2 sets of injectors. The theory is that a smaller set of "primary" injectors are used under normal driving conditions and a set of "secondary" injectors are setup to kick in at a programmed rpm/boost level/spark....etc. This concept interests me for a number of reasons but one being fuel consumption and driveability. In the future I will be using my car 2-3 times a week to commute to work (70+ miles a day) in order to give my poor daily a rest. It would be awesome if I could keep close to stock mpg when driving the car under normal conditions and then have a set of upgraded injectors kick in when they are truly needed at which point I would watch my mpg disappear. I would like to hear from anyone that has done this and what their experience has been like...both good and bad. To be honest I am not hell bent on keeping good mpg on my 240sx because I have a daily but if I could set the car up with a setup like this then I would be interested in possibly doing so. FYI if anyone cares to know, the setup would be controlled by a Pro Efi 128 unit since its already waiting to be installed. I have posted a link to SF where one of the members a different setup with his RB30 swap and so far has had great success. I frequently talk to the member there but am interested if anyone here has some insight to further the knowledge. He is running a Walbro 255 at "low" demand and a Bosch 044 under "high" demand. Supraforums.com PS: Mods if this is in the wrong section please feel free to move. Last edited by 2muchboost; 07-06-2012 at 11:09 AM..