TD04 swap fuel management question

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alexandermf
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TD04 swap fuel management question

Post by alexandermf »

sorry if its been covered but most of the td04 info i see are ppl asking about the 90* elbow and mounting questions.

im about to swap a td04 in my 93ss which already has a tmic. my question is, do i need a fuel management/tuning program to help with proper afr's or am i good to go to just slap it in. i purchased a turboxs mbc and a boost/vaccuum gauge to go along with the install. im not trying to turn the boost up and run like a raped ape, my vf11 is leaking/smoking and figured the td04 would be a small but decent upgrade
alexandermf
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Re: TD04 swap fuel management question

Post by alexandermf »

one buddy said im good to go and another said he would recommend a psi fuel pressure regulator with gauge
mike-tracy
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Re: TD04 swap fuel management question

Post by mike-tracy »

Your ecu will be sufficient to handle the TD04. Since fuel cut is right around 14psi, so long as you have a healthy engine, you should be fine running it right below cut, since the TD04 is only a little bit bigger turbo.

Edit: WTDash pointed out that on a stock ej22t ecu, fuel cut actually occurs at or around 13psi.
1992 Legacy SS 5mt, build in progress
Josh Colombo wrote: Mon Jan 14, 2002 10:23 am Wait....I'm confused now.
James614
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Re: TD04 swap fuel management question

Post by James614 »

You'll definitely be fine. Fuel cut saves your bacon within a safe limit on the TD04. The RRFPR is really only needed when using a bigger turbo or an FCD to run past 14psi.
93 Touring Wagon (EJ20G 5spd Swap) -- Finally back and running strong as ever!

05 Outback 2.5XT 5spd -- Now the wife can have her SUV and get in on the turbo Legacy goodness at the same time.
alexandermf
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Re: TD04 swap fuel management question

Post by alexandermf »

Thanks for all the help and input!

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wtdash
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Re: TD04 swap fuel management question

Post by wtdash »

Just a heads up (and no offense to Mike) but Fuel Cut is @ 13 psi, per the Legacy Turbo FAQ. I point it out so you don't set your MBC @ 13 and wonder why every 3 seconds it cuts boost. Set it to 12 and you'll be good to go, depending on your elevation in CO.

Oh, and since you read all those posts about the 90 elbow and TD04 you're prepared, correct? :)
GL,
TD
Turbo Subies:
'87 GL-10 Turbo - SOLD
'90 BJ EJ22T/DOHC & 5speed swap - SOLD
'04 FXT, Forged internals, VF39, STI TMIC, Cobb AP- SOLD
'93 Legacy SS - 5-speed, SOLD :-(
'02 WRX -SOLD
'96 BD-turbo'd-SOLD
'98 SF - NA-T
mike-tracy
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Re: TD04 swap fuel management question

Post by mike-tracy »

wtdash wrote:Just a heads up (and no offense to Mike) but Fuel Cut is @ 13 psi, per the Legacy Turbo FAQ. I point it out so you don't set your MBC @ 13 and wonder why every 3 seconds it cuts boost. Set it to 12 and you'll be good to go, depending on your elevation in CO.

Oh, and since you read all those posts about the 90 elbow and TD04 you're prepared, correct? :)
GL,
TD
Oh whoops! I guess I'm thinking about my own ej20g 3C ecu. Good catch Todd!
1992 Legacy SS 5mt, build in progress
Josh Colombo wrote: Mon Jan 14, 2002 10:23 am Wait....I'm confused now.
alexandermf
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Re: TD04 swap fuel management question

Post by alexandermf »

Thnx for the fuel cut info and yes I'm ready to cut that 90 to fit nice and snug!

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