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Old 01-06-2012, 04:49 PM   #1
Jordan
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Default Injector selection

Is it possible to buy injectors that are too large?

I have an adjustable fuel pressure regulator and MS3X. Even with full adjustability of fuel injection, can I buy injectors that are too large? I'd like to just get 1000cc pieces so I won't have to worry about it for a long time, but don't want to do so if for some reason they would be too large...

My goal at this point is around 300whp. Stock (rebuilt) internal, very light head porting and I'd like to run 15psi with a larger turbo that what I have bolted on now (16T).
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Old 01-06-2012, 06:34 PM   #2
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What injectors are you looking at?

I'd do ID1000s and that'll set you fo lyfe. You can make them idle like an OEM car.
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Old 01-06-2012, 07:37 PM   #3
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It's not even close.
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Old 01-06-2012, 07:53 PM   #4
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Originally Posted by scottyd View Post
I'd do ID1000s and that'll set you fo lyfe. You can make them idle like an OEM car.
Yeah but they're like a million dollars. Jordan I wouldn't worry about going nuts yet. Just get something that'll reach your goals for now without breaking the bank. Then when/if you're ready to start making real power you can upgrade to the fancy ****.

Something like so I think would suit your needs well: http://www.diyautotune.com/catalog/d...owz-p-280.html

Those are EV1 style so drop in on your car. What does MS use for impedance for injection? I'd guess low z? If so those ones I linked would work perfect as is. Plus they're cheap enough and if you ever need to upgrade just sell 'em to the next guy looking for mid-ish level power.

EDIT: Yeah, looks like MS3 is made for low z so those injectors are perfect as is.
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Old 01-06-2012, 07:55 PM   #5
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They're $400ish? But if he's asking about something being too big, then the MS ones will be too big. If he doesn't care about idle quality then yea, go for it.
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Old 01-06-2012, 07:59 PM   #6
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1000cc should be plenty for your goal and upgrades in the future. start throwing corn 85 in the mix and things may get hairy, duty cycle wise.

I am not certain you will be able to get 300wheel with a 16t. i've seen alot of heebspeed hopefuls walk away with less power and a little more setup then yours.

either be comfortable with 250ish or go bigger on the turbo, 2 cents.
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Old 01-06-2012, 08:00 PM   #7
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They're $400ish?
$115/each. Yes they're a better injector than the Delphis, but they're also almost twice as much. I'm all for splurging on awesome parts so if you got the scratch for them I'd say go for the Injector Dynamics.

On the other hand, the Delphis will work fine for your goals and save you a couple hundred dollars.
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Old 01-06-2012, 08:25 PM   #8
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I ran 95lb delphis that are like 55 each, and paid like 240.00 for a 120lb injector matched set. I made 400whp on the 95, and 500whp on the 120.

The ID1000 are based on 60psi base pressure, so better have enough pump. Bergen made 523whp on corn with them.

I'm running a 2150cc injector and idle stoich at 15.5 afr.

Check out racetronix.com
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Old 01-06-2012, 09:51 PM   #9
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Cam, that's exactly what I was going to buy.

And brett, I mentioned that id like a larger turbo in my OP

Last edited by Jordan; 01-06-2012 at 09:57 PM..
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Old 01-06-2012, 11:24 PM   #10
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Post removed for being completely wrong...
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Old 01-06-2012, 11:25 PM   #11
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Quote:
Originally Posted by 1983Turbo242 View Post
1 cc per HP. Plus 10% to account for E15 blend. 350cc Injectors would work great.
on a 300+whp car are you tweakin?
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Old 01-06-2012, 11:28 PM   #12
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on a 300+whp car are you tweakin?
No, I'm going off what real tuning shops have told me, what my engine builder told me, and what every tuner I have talked to has told me. Did you know 2.5" exhaust is good past 400whp? Also, read my Sig, obey my Sig.
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Old 01-06-2012, 11:29 PM   #13
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Originally Posted by 1983Turbo242 View Post
No, I'm going off what real tuning shops have told me, what my engine builder told me, and what every tuner I have talked to has told me. Did you know 2.5" exhaust is good past 400whp?
Yes I did(at least Corky Bell said so). I think however, that your injector cc's are off...by a lot.



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Old 01-06-2012, 11:32 PM   #14
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Holy balls I was off. Motec says 5.5 cc per HP. ^ that's me looking like an ass-hat.
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Old 01-06-2012, 11:34 PM   #15
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Holy balls I was off. Motec says 5.5 cc per HP. ^ that's me looking like an ass-hat.
Meh, **** happens.
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Old 01-06-2012, 11:35 PM   #16
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For reference here. My 1000cc (95lb Delphis) made 410whp at 82%dc on pump gas. Bergens car was nearing 100% on his ID1000 for his 500whp. And my 1225cc (120lb Delphis) made 510whp at 78%dc on pump/meth.
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Old 01-07-2012, 12:06 AM   #17
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I have a matched set of those delphi 95 lb/hr injectors that I ran for about 5k miles with a new fuel filter. PM me if you're interested. Getting them to idle smoothly takes some work because the fuel delivery isn't very linear at low pulsewidths compared to those fancy ID units.
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Old 01-07-2012, 01:14 AM   #18
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Quote:
Originally Posted by 1983Turbo242 View Post
No, I'm going off what real tuning shops have told me, what my engine builder told me, and what every tuner I have talked to has told me. Did you know 2.5" exhaust is good past 400whp? Also, read my Sig, obey my Sig.
It may be good for that power but doesn't mean you want it for that power. I like area under the curve personally.

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Corky Bell said so
Don't EVER use that as an argument. That man is a moron.
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Old 01-07-2012, 04:27 AM   #19
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Don't EVER use that as an argument. That man is a moron.
^
Bahahahahahahahaha

I use 75lbs on e85 at 20ish psi. Good to go on my end
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Old 01-07-2012, 07:41 AM   #20
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Don't EVER use that as an argument. That man is a moron.
you will watch your tongue.
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Old 01-07-2012, 08:29 AM   #21
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^saw that coming
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Old 01-07-2012, 09:36 AM   #22
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I'm running the blue injectors from a Subaru WRX Turbo there either 440/470cc with Regina/AFC and a gt35 turbo, I made 237whp at 9psi and 3% DC, seconded run was 291whp at 16psi with 38%DC, tried a 3rd run on 20psi but the damn Regina ECU started to wig out:(
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Old 01-07-2012, 09:53 AM   #23
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Here you go, this is a mod for the injectors I'm running, might help you decide with what you want to purchase.
http://www.teamscss.com/Subaru%20WRX...ctor%20Mod.htm
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Old 01-07-2012, 01:45 PM   #24
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It's worth keeping in mind that the main reason ID's are good, is because Bosch Design 4's are good.

What ID do, is they buy large batches of Design 4's, test them, then group them together with other injectors n the batch with similar test results.

This is a nice touch, but the tolerances in Design 4's are pretty good out of the box.

You can buy design 4's for much cheaper.

I bought 750's from Fuel Injector Connection, they are a great company.

These are a nice option as they use an EV1 connector, so you don't need USCAR adapters:
http://fuelinjectorconnection.com/sh...&productId=244

Keep in mind most design 4's are 48mm oring-to-oring, so they will need adapters or a modified fuel rail (stock injectors are 60mm long).

For my BMW project I bought new bosch 750's from Oside Tiger. The BMW fuel rail/wiring harness box setup is all kinda integrated and I didn't want to mess with it so I am using standard bosch injectors.

Honestly anything new and set up correctly in the 750-1000cc range with a programmable EMS will work out fine except for maybe some of the really nasty disc type injectors...
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Old 01-07-2012, 02:01 PM   #25
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My FIC2150 are the same as the ID2000, and Bondo your right, the injectors are TINY! The inj plug is about the same size as the injector itself. The Billet adapters are neat too. I installed some Orings top and bottom to tighten the stack up on my rail, since there is no prevision for a clip, and the "tower" was kinda wobbly with the 3pcs stacked in there.
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