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Fueling issues?
Posted: Fri Jan 26, 2007 3:41 am
by FuJi K
okies...so I have this setup on my EJ22T swap.
XSPOWER (Stone Racing/SSAutochrome) header/uppipe; 4-1 header coated/wrapped
3" bellmouth downpipe (x3Racing) coated/wrapped
3" catback
Freshly rebuilt TD04L
'02 WRX TMIC
'02 WRX fuel pump
I plan to be boosting @ 12.75lbs at the borderline of the BOOST CUT with this WRX turbo. Will I be running into any fueling issues? Even if the EJ22T injectors are reading 90% duty cycle, will the a/f still be slightly on the rich side? I may have to run a RRFPR to up it. I've hear the SVX has a higher pressure fuel pressure regulator, true? Fitment?
What about MAF issues? I have the BLACK MAF and was wondering if putting that on will solve anything?
Engine management I'm just running the STOCK EJ22T ECU.
Posted: Fri Jan 26, 2007 3:56 am
by douglas vincent
Cheapest (?) but easiest solution would be a 3-1 rrfpr.
going for 44 psi to (12 psi x 3 =) 80psi.... This would bump your injector to be about 500 cc.
Posted: Fri Jan 26, 2007 3:58 am
by Binford
No issues. I am running a very similar setup (minus header/up-pipe) and I run up to 16-18 psi with no problems. I have done NOTHING to the stock turbo fuel system other than a Walbro pump. WRX pump should have no problem either. I'm running the stock metal MAF right now, but I may switch to the plastic one cuase I have one laying around.
Posted: Fri Jan 26, 2007 8:39 am
by Richard
What's better about the plastic one?
Posted: Fri Jan 26, 2007 5:26 pm
by douglas vincent
plastic one doesnt max out as soon, ie it takes more air flow to hit 5 volts.
Posted: Fri Jan 26, 2007 5:54 pm
by FuJi K
humm......
I MAY want to push 16psi with this TD04...... but then it's the MAF that I'm afraid of the may make the injectors shoot out the wrong fuel; not enough or too much.
If the fueling is sufficient with this setup, I may want to do up a FCD and boost to 16psi. IF fueling isn't sufficient, then I'll just boost to 12.75psi.
Do I want to put on this plastic MAF for 16psi? It would lean out the a/f which would be oppisite of what I want with this TD04.
Posted: Fri Jan 26, 2007 6:37 pm
by Imprezive
I think you are good, the TD04 doesnt flow that much more than a vf11.
Posted: Fri Jan 26, 2007 7:42 pm
by Binford
Imprezive wrote:I think you are good, the TD04 doesnt flow that much more than a vf11.
+1
Posted: Fri Jan 26, 2007 11:42 pm
by Richard
I apologize if this becomes a hijack, but where can you find the plastic MAFs? Certain Leggys or are they random? Maybe Blackbart has the hookup. Anywhoo, I would appreciate a little more info on the plastic ones. Thanks!
Posted: Sat Jan 27, 2007 12:28 am
by douglas vincent
Junkyard, all Auto 90-94, and 92-94 5mt NA had them.
You will get a CEL though, but all you have to do is ground out the blue wire and it will go away.
Posted: Sat Jan 27, 2007 12:43 am
by Matt Monson
In addition to the Leggies mentioned, it can be found on all 93-98 MAF based Imprezas and Legacies. I refer to it as the AA160 MAF. It's pretty damned universal and is what was also used on early WRX's and early Leggy Turbos in other markets...
Posted: Sat Jan 27, 2007 6:21 am
by FuJi K
Imprezive wrote:I think you are good, the TD04 doesnt flow that much more than a vf11.
good for 12.75psi....... what about 16psi?
Posted: Thu Feb 01, 2007 3:31 am
by FuJi K
TTT
wouldn't I be running RICH once I past 13psi.....because the MAF would max out there....then injectors go WOT and are 100% IDC....push to 16psi and still hope that a/f are not near 13:1.
Posted: Mon Feb 05, 2007 9:38 pm
by FuJi K
so then be it.... 110leaded fuel here I come.