Hi guys, I have a Boosted B20VTEC, which is managed by a Microtech LT-10s with 45psi Map sensor.

It puts out 536whp at 24psi.
I am in the process of changing stock fuel system to, 10mm feed line with 8mm return and 16mm ID fuel rail along with a high flow fpr. And have in-tank 255l/h walbro and bosch 044 before the rail..

The question is, I would like to run 8 injectors and two rails, and I think microtech can control 8 injectors.

Its a street car and I want economy when cruising.
I currently have 4 x Siemens deka 83lb/min injectors and im think of using maybe another 4 x 350cc injectors, which will operate alone - on light throttle loads and cruising.

And when the car goes into boost, the other 4 x siemens inj work in conjunction..

The reason for this, is not to have to run the 4 X siemens inj over 80% or tooo high fuel pressure when boosting over 20psi or so..

I would be happier, with lower duty cycle and pressure, on each inj to get the desired fuel flow at high boost..

My question is, do you guys think its a good idea, so as to "divide labour" between 8 inj instead of 4, so as to get the best of both worlds in terms of economy and high flow when needed..

N.B I dont want to get bigger inj than I already have.

Your help and input will be greatly appreciated - TIA.

 

The way you are doing it was an old school way that was typically done before injectors of the larger sizes were available. They were typically controlled by a separate managment unit (the old MF2s come to mind), so no, its not a bad idea if you don't want to change injectors. I'd use 2 LARGER injectors instead 4 extra, but that is up to you.

The principle idea is not a bad one though.

 

That is what I am doing right now. I am tired of driving around town with 1600cc injectors....sitting at stop lights, cruising part throttle to the track, etc. I am going to get some 530 or 750cc injectors for cruise, idle, off boost and then under boost, a set of 1000cc will add with the others for make it happen power.

I didn't know microtech will handle 8 injectors, but if so...go for it.

 

8 injectors used to be old school, because the computers couldn't run 1000cc injectors worth a damn. Now 8 injectors are coming back because we're making too much damn power! lol

 

I guess you are a little behind there. Did you do know that there is a quote post button at the bottom right corner of everyone's post?

 

Get the Bosch injectors from Tony. Get a better regulator....Aeromotive or Weldon. Run a Y from your feed line into the two rails (or what ever your fuel rail setup is) and then into the sides of the regulator and return off the bottom.