Larger Injectors For Forced Induction

[boostisgood]

Some info I got on the stockers when I first got my MSP. I had an HKS CAMP system in there, and they monitor injector duty cycles. I dont have it anymore, but I still got the info.

At stock boost, the stock injectors were fluxuate 70-80% duty cycle.
At 10 PSI, they would go to 80-90% duty cycle.

Thats about all the data I still got from this, but most people will tell you, injectors CAN go static open or static close after about 80-85% duty cycle. Im surprised that no one has reported stock injector issues when upping thier boost.

 

[TurfBurn]

Steve,

Squential or Batch?

Sequential.

 

[TurfBurn]

Wouldn't the lareger fuel rail just act as a sorta like fuel pre-staging resovior?

The resevoirs I don't think are really as big of an issue as the fact that you need to get fuel up there... I think the lines would be a bottleneck... I have stock lines up to the firewall and have never seen a lean-out issue... so I don't think upgraded fuel rails are necessary... but we'll see over time..

 

[robp5t]

rc enginering 550 cc peak and hold and mam fuel rail with -8 hose. The 550 or taller and you have to make a shim in order to fit the stock fuel rail but not with the mam fuel rail he has adjustments that work perfect.

 

[TurfBurn]

rc enginering 550 cc peak and hold and mam fuel rail with -8 hose. The 550 or taller and you have to make a shim in order to fit the stock fuel rail but not with the mam fuel rail he has adjustments that work perfect.

Right... but spending 15 bucks in standoffs so the stock rail fits your taller injectors is a lot more reasonable then spending several hundred for a custom rail even if it is nicer... Don't get me wrong... the rail is a beautiful piece of work, very easy on the eye, and does a nice job.. just isn't needed... I'd rather see someone put that money into more gauges and monitoring equipment or ignition for high boost levels than into a fuel rail that doesn't need upgrading... I think the rail is nice, but it would be a "low" priority in a build.

 

[robp5t]

Yes your probably wright but I didnt like the way the standoffs looked and the fuel rail was only 180.00 dollars and does look more appealing so to me it was worth it even if its not needed.

 

[TurfBurn]

understandable

 

[brealmp3]

does our car use high or low impedence injectors?

 

[RyanJayG]

high impedance (saturated circuit) injectors

 

[NSNMotorsports]

and right now I'm running low impedance injectors in my setup... i can even mix them when I'm using the Microtech.

 

[brealmp3]

so what would the effect of me running a low impedence injector instead of a high impedence be?

 

[TurfBurn]

A fried ECU.

 

[brealmp3]

well that would not be good...

Thanks

 

[LinuxRacr]

No, a fried ECU is NOT good. lol!

 

[igdrasil]

If you want to use low impedance injectors you will need a resistor pack, then they will be good to use...but why take the hassle? I would do high imp

 

[anarchistchiken]

Ok, since I'm still a newb in tuning stuff as far as FI (fuel injection) goes, help me out here. If I was to make, say, 300 whp with a Haltech E6k computer, then what size injectors would I need?

 

[tekkie]

I would say 440's should be the best choice, especially since Juan already has the Haltech setup for those.

Ok, since I'm still a newb in tuning stuff as far as FI (fuel injection) goes, help me out here. If I was to make, say, 300 whp with a Haltech E6k computer, then what size injectors would I need?

 

[TurfBurn]

weird.. lost my post.. I said 440's or 550's... but Tekkie's point is great... I'd run that 440 then since they are setup for it... you should be ok for power still at that point.

Later.

Steve

 

[brealmp3]

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1,1&item=7974451312&sspagename=STRK%3AMEWA%3AIT

anyone think these would be worth a damn? I'm having trouble finding some WRX injectors for sale, so I'm looking for other options.

Thanks

 

[Focus]

http://www.nasioc.com/