Larger Injectors For Forced Induction

[mspeedP5]

Are the 550's a perfect match to the rail and harness?

*Edit* NM, I checked your website...

 

[mspeedP5]

Well here you go ... With Ryan doing more searching.. and me making phone calls we found them... P5249452 is the chrysler part number of the injector and they are only 40 bucks a piece

Steve,
I went to install your 550's that you sent me today and they do not fit the OEM fuel rail. I think you may have sent me the wrong injectors as they are a different MOPAR part from what you are reffering to here and they are definitely different from the ones pictured on your website.
Attached are pics of what I got from you. Note the part no.

Tried to phone you but just got the answering machine...

We are now in the process of wiring the old clips back on so the OEM injectors can go back in to get me home. Drove 200 km to my shop to do this today...

 

[TurfBurn]

Those are the right injectors and the right part number... the part number you quoted is WAY off... I verified those injectors and they do fit when installed properlly. We've sold dozens of sets... so the problem is not with those parts man. Sorry you guys had problems and that I missed your call, but the parts are right!

 

[mspeedP5]

I guess I should have taken a picture of the injector and the fuel rail. They physically do not fit in the rail. That is why we had to abort the whole project.
I will ask my shop to speak with you directly about this I guess. Man, all I want is for this to work.

 

[mspeedP5]

Those are the right injectors and the right part number... the part number you quoted is WAY off... I verified those injectors and they do fit when installed properlly. We've sold dozens of sets... so the problem is not with those parts man. Sorry you guys had problems and that I missed your call, but the parts are right!

This is how far these injectors will insert into the OEM fuel rail. What am I missing here?

 

[TurfBurn]

What you show is correct. That shoulder will bottom out into the bell mouth of the injector port onthe fuel rail. the o-rings go up far enough into the port to allow for it to seal up and not leak, especially once tightened down properly. I know it may "seem" weird but we have plenty of these out there with no issue at all with sealing and so forth.

Also, you need to take the insulators off the tips of the stock injectors and put them on the tips of the new injectors so that they seal correctly in the manifold.

 

[mspeedP5]

What you show is correct. That shoulder will bottom out into the bell mouth of the injector port onthe fuel rail. the o-rings go up far enough into the port to allow for it to seal up and not leak, especially once tightened down properly. I know it may "seem" weird but we have plenty of these out there with no issue at all with sealing and so forth.

Also, you need to take the insulators off the tips of the stock injectors and put them on the tips of the new injectors so that they seal correctly in the manifold.

I see. Valuble information... that I could have used yesterday. Sounds like the injectors basically sit in the manifold and then the fuel rail as tightened down over top of them to secure them in place.
Okay I am going to ask Chris (my installer) to review this. He might call you this morning (afternoon for you I guess) to go over this.
Thanks Steve.

 

[TurfBurn]

We used to have instructions out with the injectors but nobody was using them or having problems, so to help keep the overhead down we discontinued that. Sounds like this was a case where it would have been good though. I really am sorry that you have had problems with the kit and that I missed your call. I did try to call back as soon as I got it which was about an hour or so after you left it but got nothing at the shop.

Later!

Steve

 

[mspeedP5]

Ya, Chris was on his own at the shop today and he was swamped so he never got a chance to contact you. The install has been put off for now until I can get time to drive back down there.
Damn, I was hoping to roll into the Auto-X tomorrow pushing 300whp!

 

[kz9]

Ok heres the deal....

I am running 440 WRX injectors. I recently just upped the boost from 10psi to 15 psi. I have been trying to add fuel to richen it but it seems not to do anything. After some investegating I relize that the e-manage is sayin that the duty cycle is 100%? Souldn't 440cc be able to keepn up to 15psi?

I have done lots of work to the engine as in forgein and all that, as well as got the head done. I know theres lots of guys that probley have the same s*** that I have done so I figure I can find some help on here.

My fuel system consists of the following:

E-manage
Perrin fuel rail
Vortech RRFPR (hits about 85psi under boost)
440cc WRX injectors

Also have a set of 740cc modified WRX injector, but I think they are too big to install.

Any suggestions?

 

[igdrasil]

Ok heres the deal....

I am running 440 WRX injectors. I recently just upped the boost from 10psi to 15 psi.

Also have a set of 740cc modified WRX injector, but I think they are too big to install.

Any suggestions?

What A/F? Timing? Do you have cams or P&P parts? It will all depend on the headflow, tunning and turbo eff.

740 will do fine, maybe better. I wouldnt even boost 15psi with 440s, a small overboost and you may have trouble.

 

[kz9]

What A/F? Timing? Do you have cams or P&P parts? It will all depend on the headflow, tunning and turbo eff.

740 will do fine, maybe better. I wouldnt even boost 15psi with 440s, a small overboost and you may have trouble.

Can't get the car under 12 afr. The duty cycle is max.

Installed the 740cc's today.

The e-manage seems to be able to control them at idle, but when I let off the gas, the car seems to be flooding out and stalling.

I had the same problem with the 440cc's but it would only stall out if I shut the pedel at high rpm and acceleration.

Anyone know a trick for this?

 

[TurfBurn]

No way in hell you should be maxing out 440's at 15 psi (you can get to 15 psi on 280cc injectors and make over 260 whp on them). Your "problem" sounds like it's the E-manage.

 

[DH Motorsports]

Just for reference, use it how you like. At 18psi, our green tops were at near 100% IDC. At 16psi they'd constantly see over 90%, and at 15psi they'd be right at the peak 85% IDC.

 

[TurfBurn]

And your green tops are what CC? Or are you referring to the green stock injectors or???

 

[kz9]

No way in hell you should be maxing out 440's at 15 psi (you can get to 15 psi on 280cc injectors and make over 260 whp on them). Your "problem" sounds like it's the E-manage.

Thats what I thought. It might be the correction factor for the injector size. Now that I got the 740cc'c in it, and have the correction factor set at 550cc, they seem to run only at 1% duty as compared to when I had the 440cc's in they seemed to idle at 7-9% duty. This is at idle.

I think I might put the 440cc's back in and see if I can play with the correction factor so I am not maxin out the injectors.

I am kinda hintin towards the E-manage being screwed up but I don't know yet.

 

[DH Motorsports]

Sorry, they are the Ford Mustang Green Top 440cc.

 

[Maxx Mazda]

FWIW I'm running the STi 575's with my E6X no problem...

 

[mspeedP5]

Anyone here running the Mopar 550's and if so, what has been your overall experience with fitment in the stock fuel rail? Pics of your install will be very usefull as well.
Thanks...

 

[kyle's protege5]

Thats what I thought. It might be the correction factor for the injector size. Now that I got the 740cc'c in it, and have the correction factor set at 550cc, they seem to run only at 1% duty as compared to when I had the 440cc's in they seemed to idle at 7-9% duty. This is at idle.

I think I might put the 440cc's back in and see if I can play with the correction factor so I am not maxin out the injectors.

I am kinda hintin towards the E-manage being screwed up but I don't know yet.

I'm with you. my wrx 440 were maxing out at 15-16 also. What correction did you have to put in to make it idle right. I believe i had to put mine at 380cc. i see you had to put the 740's at 550. so the emanage is goofy like that some how.

Also why do you what to go richer than 12? thats pretty damn rich. I had mine in the mid - high 12's ish on on boost and when i'm done with the new setup, and now that i have the water/meth injection, i'm gonna try to lean it out in the high 13's. According to Snow thats what to shoot for. You make the most horsepower on the edge of detonation.

So i'm thinking, or hoping actually, that by running the pretty huge turbo i have now, compared to the t25, and the fact im gonna run leaner, i'm hoping the 440's will be plenty.