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Old 03-31-2012, 05:50 PM   #1
DaBlueSquirrel
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Join Date: Feb 2012
Chapter/Region: AKIC
Location: North Pole, Alaska
Vehicle:
2002 WRX
Blue

Default injectors?

So when I bought my car I was told the injectors were DW 650's. I got my wideband in last night and was playing with the tune and noticed the injector Latencies and scaling was nothing close to 650's. i took a look at the setup and they are blue top feed injectors. I have been looking around and found that DW does not do Blue 650cc injecotrs but htey do offer blue 750cc and 850cc injectors in Blue. I am not wanting to tear apart everything to see if there are any marking but by any chance does anyone know of any other blue top feeds?
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Old 03-31-2012, 06:07 PM   #2
cosseywrx
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Default

stock 05 injectors are blue. DW will have numbers etched on each one as DW injectors are stock injectors that have been made to produce a higher flow rate or CC. my stocks are 465cc i believe? i would ask if that guy had a flow chart with his as he should when he ordered the injectors.
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Old 03-31-2012, 06:10 PM   #3
DaBlueSquirrel
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Blue

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He has nothing.. he bought it with them on. I have no doubt they are larger injectors. I am running 18 LBS on the Blouch Polka setup maxing out my MAF and Still am running pig rich (10.0's)
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Old 04-01-2012, 03:53 PM   #4
cosseywrx
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your closed loop is good tho right? i would really pull them off and checkm...need a hand let me know
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Old 04-01-2012, 08:37 PM   #5
DaBlueSquirrel
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Closed loop is great.... I am dreading pulling them off just to check. I have my Intercooler piping and stuff that will have to come off.
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Old 04-01-2012, 08:40 PM   #6
cosseywrx
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ahhh its prolly to late to do it now...but ive done it enough that i can pull it all off and back on within a hr or so...piece of cake
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Old 04-01-2012, 09:46 PM   #7
DaBlueSquirrel
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I know what you mean, its not difficult at all just time consuming. What gets me is I would be pulling it all apart just to know LOL. Its a different story if i was fixing or upgrading something you know what i mean.
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Old 04-01-2012, 10:26 PM   #8
cosseywrx
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word...so buy some injectors...problem solved! and if the old ones are good sell one or the other! lol
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Old 04-01-2012, 10:35 PM   #9
retrac
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Probably faster to have someone pull the rom and look at the injector scaling.
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Old 04-01-2012, 11:09 PM   #10
DaBlueSquirrel
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Blue

Default

Quote:
Originally Posted by cosseywrx View Post
word...so buy some injectors...problem solved! and if the old ones are good sell one or the other! lol
LOL I have WAY more than enough fuel at the moment, so no need for new injectors yet

Quote:
Originally Posted by retrac View Post
Probably faster to have someone pull the rom and look at the injector scaling.
When I bought the car the fuel system was set at a base pressure of 15PSI and it was scaled at 5420.

I turned the base fuel pressure up to 43 PSI and re scaled them to 4485.

Injector Latencies are 2.79 @ 6.5V, 1.48 @ 9v, 0.98 @ 11.5v, 0.78 @ 14v, 0.48 @ 16.50v

All in all I need to figure it out and start fresh on a tune this way I can make sure everything is where it needs to be.
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Old 04-01-2012, 11:40 PM   #11
DaBlueSquirrel
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Blue

Default

I just went out and tried to sneak a peek on the injectors. The only markings on it are

Denso
91 in the plastic casting
3500 in the plastic casting

and etched on the one I looked at under the plug it had 46 etched in.
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Old 04-02-2012, 01:35 AM   #12
cosseywrx
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OBP

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theere prolly bigger injectors then...all of mine have numbers etched on them...numbers are to match to the flow sheet the injectors should have came with that tells you the exact CC of them all
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Old 04-02-2012, 01:41 AM   #13
DaBlueSquirrel
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Blue

Default


the person that sold the car to me swears they are 650"s I dunno
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Old 04-02-2012, 03:04 AM   #14
DaBlueSquirrel
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2002 WRX
Blue

Default

http://www.rallysportdirect.com/Deat...-2007-2011-STI

I may be wrong since I just found these. Now this leaves me with another question. I emailed DW and had them send me the latencies for the 650's. They are WAY different than the ones currently set up in my tune. Should I enter these latencies and start all over to make sure everything is good? No matter what I set the primary fuel tables at I am Pig rich in WOT.
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Old 04-02-2012, 02:33 PM   #15
P3Auto
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AWD Dyno, Mods, etc

Default

You have to many variables now. The latency from the paperwork rarely is what you actually want to use.

To do this right you need to simply start fresh.

1. Set base fuel pressure, make sure your rising rate on that aftermarket regulator is close to 1psi per 1psi boost.
2. Install a stock intake MAF and clean it, just temp setup for scaling
3. Vac and boost leak check all lines
4. If they are DW injectors set latency just a few MS longer than stock latency.
5. Warm up car and scale injectors within +-5% at idle. Remember long term learned and short term trims must be added together for your total corrections.

OR

If your closed loop is all dead on then adjust the open loop fueling tables to lean the car out. Don't get bent out of shape trying to match open loop targets to your tune. If I remember correctly that car has weird things done with the fuel system.

The fact you are not doing a lot of trims in the closed loop section of the tune tells me your scaling is pretty good. If your latency is to high you will see a rich curve on your map vs MAF. Like I said DW latency is usually just slightly longer than stock on 600-900cc injectors due to the fact they are modified stock injectors.

Obviously there is more to this but if your getting the fuel you want by adjusting the open loop tables then thats a start!


Quote:
Originally Posted by DaBlueSquirrel View Post
http://www.rallysportdirect.com/Deat...-2007-2011-STI

I may be wrong since I just found these. Now this leaves me with another question. I emailed DW and had them send me the latencies for the 650's. They are WAY different than the ones currently set up in my tune. Should I enter these latencies and start all over to make sure everything is good? No matter what I set the primary fuel tables at I am Pig rich in WOT.
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Old 04-03-2012, 01:57 AM   #16
DaBlueSquirrel
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Location: North Pole, Alaska
Vehicle:
2002 WRX
Blue

Default

Since I do not have a stock intake available, can I take the MAF calibrations from one of the COBB tunes for the SF intake? I have the SF intake on my car. Closed loop is 14.7-15.2, Mainly in the 14's. WOT no matter how much i play with the Primary fuel tables i am still rich. I should have my AEM EMS here in a couple of weeks and will have to start over anyways. I just want to get this one down so I know how to approach the AEM.
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Old 04-03-2012, 02:23 AM   #17
cosseywrx
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2005 2.1 stroker WRX
OBP

Default

i have most the stock setup...you could borrow it...just lmk
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Old 04-03-2012, 03:10 AM   #18
Dominator
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Location: Fairbanks, Alaska
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Pearl White

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^ Yeah, if it's a few hours only, we could let you use some of Kelly's 100% stock intake parts. If there was a BBQ involved.
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Old 04-03-2012, 03:39 AM   #19
P3Auto
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AWD Dyno, Mods, etc

Default

You really are half way here. Unless there is something wrong with your aftermarket fpr (which you don't need stock is fine) you should be able to map the fuel you want with the open loop table.

Could be a boost leak as well or a bad maf.
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