Ok, so here's the advice I need. Im getting back my series 5 Turbo motor from Pineapple Racing tomorrow. Its been streetported, stage 2 oil mods, upgraded water seals, etc....I will be running the BNR supercars stage 4 turbo upgrade on the stock computer until I can afford to get a haltech.

I just wanted to know what Injector size I should get??? I will probably run about 14psi for now.

I currently have the SR motorsports rising rate fuel regulator and nippondenso pump.

Any help is greatly appreciated.

 

Are you thinking of upgrading just the secondaries, or both.

I'm running 720/1600, but I also have an EMS.

Don't know how well you car would idle with very large injectors and just the stock ECU.

Maybe upgrade to 720 secondaries for now, then when you get your Haltech, put those in the primary and go 1600 or whatever secondaries?

 

I thought the secondary injectors are not even operating when at idle???

 

True.

I was talking about idle with larger primary injectors.

All my **** (fuel, injectors, ems) was done at the same time, so I don't know how larger primary's would affect a stock ecu idle.

Maybe I'm just talking out of my ***...but at least your topic is staying current.

 

Can anyone else recommend what size injectors I should use for the above setup? My sig will list my mods.

 

4x720 plus a S-afc might get you by for now... but I certanly wouldn't be running 14psi off it untill you got a full ECU.


do you have a FMIC?? I probably wouldn't run that turbo past 8psi or so on the stock IC...

 

I think you mean until you can afford another engine + haltech....

 

Under conservative driving (under 3800rpm normal street driving), the secondary injectors wouldnt cause a decrease in gas mileage correct?