Fueling issues?

FuJi K · Post by **FuJi K** » Fri Jan 26, 2007 3:41 am

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.

douglas vincent · Post by **douglas vincent** » Fri Jan 26, 2007 3:56 am

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.

Binford · Post by **Binford** » Fri Jan 26, 2007 3:58 am

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.

Richard · Post by **Richard** » Fri Jan 26, 2007 8:39 am

What's better about the plastic one?

douglas vincent · Post by **douglas vincent** » Fri Jan 26, 2007 5:26 pm

plastic one doesnt max out as soon, ie it takes more air flow to hit 5 volts.

FuJi K · Post by **FuJi K** » Fri Jan 26, 2007 5:54 pm

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.

Imprezive · Post by **Imprezive** » Fri Jan 26, 2007 6:37 pm

I think you are good, the TD04 doesnt flow that much more than a vf11.

Binford · Post by **Binford** » Fri Jan 26, 2007 7:42 pm

Imprezive wrote:I think you are good, the TD04 doesnt flow that much more than a vf11.

+1

Richard · Post by **Richard** » Fri Jan 26, 2007 11:42 pm

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!

douglas vincent · Post by **douglas vincent** » Sat Jan 27, 2007 12:28 am

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.

Matt Monson · Post by **Matt Monson** » Sat Jan 27, 2007 12:43 am

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...

FuJi K · Post by **FuJi K** » Sat Jan 27, 2007 6:21 am

Imprezive wrote:I think you are good, the TD04 doesnt flow that much more than a vf11.

good for 12.75psi....... what about 16psi?

FuJi K · Post by **FuJi K** » Thu Feb 01, 2007 3:31 am

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.

FuJi K · Post by **FuJi K** » Mon Feb 05, 2007 9:38 pm

so then be it.... 110leaded fuel here I come.

legacycentral bbs

A forum for 89-94 BC-BF(BJ) Legacy Owners and Fans

Fueling issues?

Fueling issues?