injectors

jprince · Post by **jprince** » Mon Jun 18, 2007 8:36 pm

when boosting my 2.0 with the srt set up.. running a return line and a missing link should i upgrade my injetors or will th stockers be fine, just running stock srt boost 5psi is it?
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Kevin_GP · Post by **Kevin_GP** » Mon Jun 18, 2007 8:42 pm

You should pick up some stage 0 and you would be fine, I wouldn't use stockers.

jprince · Post by **jprince** » Mon Jun 18, 2007 9:06 pm

k will do thanks..
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hul kogan · Post by **hul kogan** » Tue Jun 19, 2007 9:07 am

Yea, stockers just don't throw enough fuel for a turbo setup. I had Stage 0's when I had my SRT turbo and it was just too much fuel for a decent idle (at least for a RRFPR to handle). I know some people do alright with them, though. I then switched to some 27# injectors from an LS1 and they worked great. I bet 36# just might do the trick. I was going to get a set of them but picked up the LS1 injectors for a good deal.

.Chris

2toes · Post by **2toes** » Fri Jun 29, 2007 1:00 am

Will the stage 0 injectors fit 2.0 SOHC???

and there is a difference between the stock SRT4 '03 and '04/'05 injectors right?

JRM · Post by **JRM** » Fri Jun 29, 2007 2:15 am

Stage 0 injectors do fit you will just need to have some kind of fuel management so you arent running too rich at idle.

Srt stage 0: 527cc/min (stock '03)
Srt stage 1: 577cc/min (stock '04 & '05)
Srt stage 2: 680cc/min
Srt stage 3: 682cc/min

2toes · Post by **2toes** » Fri Jun 29, 2007 9:58 am

oh ok, thats what ive read before but someone on neons.org wrote this and I got spooked

"If you are talking about SRT4 injectors in a 2.0L then you need some serious work such headwork and all mods to start that need in fuel increase"

Kevin_GP · Post by **Kevin_GP** » Fri Jun 29, 2007 11:20 pm

2toes wrote:oh ok, thats what ive read before but someone on neons.org wrote this and I got spooked

"If you are talking about SRT4 injectors in a 2.0L then you need some serious work such headwork and all mods to start that need in fuel increase"

Thats probably for someone who is not boosted. You can idle the srt-4 injectors you just need to be familiar with your rrfpr. Everyone swears by check valves, but if you read the instructions you can pull fuel pressure at idle to idle the bigger injectors.

dysphagia · Post by **dysphagia** » Fri Jun 29, 2007 11:23 pm

JRM wrote:Stage 0 injectors do fit you will just need to have some kind of fuel management so you arent running too rich at idle.

Srt stage 0: 527cc/min (stock '03)
Srt stage 1: 577cc/min (stock '04 & '05)
Srt stage 2: 680cc/min
Srt stage 3: 682cc/min

stg 2 & 3 injectors are the same, 682cc/min

Kevin_GP wrote:
2toes wrote:oh ok, thats what ive read before but someone on neons.org wrote this and I got spooked

"If you are talking about SRT4 injectors in a 2.0L then you need some serious work such headwork and all mods to start that need in fuel increase"
Thats probably for someone who is not boosted. You can idle the srt-4 injectors you just need to be familiar with your rrfpr. Everyone swears by check valves, but if you read the instructions you can pull fuel pressure at idle to idle the bigger injectors.

if you shell some out for a safc II or neo you can pull lo-throttle fuel to get the long term fuel trim (idle) back in order

esteinmaier · Post by **esteinmaier** » Sun Jul 01, 2007 10:54 am

Kevin_GP wrote:
2toes wrote:oh ok, thats what ive read before but someone on neons.org wrote this and I got spooked

"If you are talking about SRT4 injectors in a 2.0L then you need some serious work such headwork and all mods to start that need in fuel increase"
Thats probably for someone who is not boosted. You can idle the srt-4 injectors you just need to be familiar with your rrfpr. Everyone swears by check valves, but if you read the instructions you can pull fuel pressure at idle to idle the bigger injectors.

If you don't have a check valve, the ECU will be constantly searching for long-term fuel trims. Your A/F ratios will never be quite right.

Just get a RRFPR that can handle very low pressures.

Kevin_GP · Post by **Kevin_GP** » Sun Jul 01, 2007 1:42 pm

esteinmaier wrote:
Kevin_GP wrote:
2toes wrote:oh ok, thats what ive read before but someone on neons.org wrote this and I got spooked

"If you are talking about SRT4 injectors in a 2.0L then you need some serious work such headwork and all mods to start that need in fuel increase"
Thats probably for someone who is not boosted. You can idle the srt-4 injectors you just need to be familiar with your rrfpr. Everyone swears by check valves, but if you read the instructions you can pull fuel pressure at idle to idle the bigger injectors.
If you don't have a check valve, the ECU will be constantly searching for long-term fuel trims. Your A/F ratios will never be quite right.

Just get a RRFPR that can handle very low pressures.

It worked fine for me and my ARFs were always right. My idle was always 14.7, as well as when I was cruising. The only problem I had was the transition between vacuum and boost and without a check valve I got rid of a lot of that transition. I just set my base pressure pretty high (with no vacuum source), and pulled fuel pressure at idle. This way it helped force fuel in at that transition, it was never perfect though. I had a SFMU and its designed to pull fuel at vacuum, if thats what you are talking about with low pressures. It says in the instructions you don't have to use a check valve, I am not sure about other rrfpr.

2toes · Post by **2toes** » Sun Jul 01, 2007 3:41 pm

yo i was just wondering, what fuel regulators do you guys use? and are you happy with it?