Anything new for updating injectors?

Snorkus, filters, throttle bodies and intake manifolds.

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Turbone
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Anything new for updating injectors?

Post by Turbone »

I've read most of the threads on updating to bigger injectors, but most of the threads etc were pretty old. Is there anything new out there for upgrades? I want to get around 400cc or better, but not over the top. I doing a mild build for my 89 RX, just refreshing the block with rings and bearings but have got a set of cams from Delta to drop in. Also going up to a VF39 and already have a Walbro 225 FP. Not looking for the most expensive, but not wanting to go real cheap either. Would love to go with Iridium fuel rails and then my options would be much easier, but price is a factor.
89 RX w/2.2T
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Legacy777
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Re: Anything new for updating injectors?

Post by Legacy777 »

What are you planning to do for engine management?

I have found for my setup with the TD05-16G turbo, 550 injectors, and 220 Delta cam I could probably use a little more fuel. Maybe 600's would be the sweet spot and I could get a little more out of the turbo.

The 550 side feeds from the STi and other compatible injectors are a pretty easy swap/conversion for the 22t motors so I'd try and stick with something that is compatible if you have the engine management to use them.
Josh

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1990 Legacy (AWD, 6MT, & EJ22T Swap)
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Turbone
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Re: Anything new for updating injectors?

Post by Turbone »

I have a modified 95 JDM WRX ECU with ESL software for tuning. Are the side feeds a drop in or do I need the fuel rails also. What about a FPR?
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Re: Anything new for updating injectors?

Post by Mister Anderson »

Depending on what heads you are using Radium Engineering makes top feed injector conversions for the 20G and 20K intakes. The V3/4 conversion use different size injectors and mounting bracket than the V1/2, but you can use the v3/4 conversion on the V1/2 by rotating the bracket 180 degrees. The injectors I’m running are 1000cc fuel injector clinics, and in parallel fuel feed. They are size 14-48-14 (evo x size). The conversion might also work on the 22T intake, but I would have test it to confirm. I’ll post some pics later of the rail setup.
91 black SS 5 speed (Canadian).... Closed deck EJ20G, fully built, V5/6 sti ra drivetrain, haltech stand-alone
93 silver TW 5 speed... rebuilt 22T with 20G heads, wrx ra drivetrain, otherwise stock.
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Legacy777
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Re: Anything new for updating injectors?

Post by Legacy777 »

Turbone wrote: Sun Sep 12, 2021 5:08 pm I have a modified 95 JDM WRX ECU with ESL software for tuning. Are the side feeds a drop in or do I need the fuel rails also. What about a FPR?
Assuming you're using an ej22t motor. You need to use the rails from a 92-94 non-turbo ej22. Those will allow the use of the STi and compatible side feed injectors. It's really probably the easiest and cheapest option to get larger injectors.
Josh

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1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

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Turbone
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Re: Anything new for updating injectors?

Post by Turbone »

Legacy777 wrote: Mon Sep 20, 2021 6:52 pm
Turbone wrote: Sun Sep 12, 2021 5:08 pm I have a modified 95 JDM WRX ECU with ESL software for tuning. Are the side feeds a drop in or do I need the fuel rails also. What about a FPR?
Assuming you're using an ej22t motor. You need to use the rails from a 92-94 non-turbo ej22. Those will allow the use of the STi and compatible side feed injectors. It's really probably the easiest and cheapest option to get larger injectors.
Thanks Josh! I spotted a couple of EJ22 in the local PnP just the other day, so I'll hit it up again tomorrow
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Turbone
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Re: Anything new for updating injectors?

Post by Turbone »

So arent the intakes the same except for the fuel rails?
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Re: Anything new for updating injectors?

Post by arse_sidewards »

Turbone wrote: Fri Oct 22, 2021 12:50 am So arent the intakes the same except for the fuel rails?
What year range?
'93, '93 and '94 Legacy L, wagons, FWD and AWD, all are NA 2.2 w/ 4EAT.
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Re: Anything new for updating injectors?

Post by Legacy777 »

In the 93 MY there is a different part number used from Sept of 92 production dates forward. However, I think the manifold should be compatible/interchangeable for all 90-94 non-turbo engines. The turbo manifold is obviously different.
Josh

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arse_sidewards
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Re: Anything new for updating injectors?

Post by arse_sidewards »

Legacy777 wrote: Fri Oct 22, 2021 7:15 pm In the 93 MY there is a different part number used from Sept of 92 production dates forward. However, I think the manifold should be compatible/interchangeable for all 90-94 non-turbo engines. The turbo manifold is obviously different.
Those cars are long gone around here. Can I not use a '95-99 manifold so long as I also use the fuel rails with it?
'93, '93 and '94 Legacy L, wagons, FWD and AWD, all are NA 2.2 w/ 4EAT.
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Re: Anything new for updating injectors?

Post by Legacy777 »

arse_sidewards wrote: Fri Oct 22, 2021 7:47 pm
Those cars are long gone around here. Can I not use a '95-99 manifold so long as I also use the fuel rails with it?
Most likely no because the intake ports on the heads are going to be different. You have to match the intake manifold to the phase of heads.

Maybe someone else can confirm they work or not.
Josh

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mike-tracy
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Re: Anything new for updating injectors?

Post by mike-tracy »

The 95 to 98 intakes bolt up but have incompatible electronics, and the 90-94 electronics don't work with em. 1999 is the first year of phase 2 ej22's, nothing from that works.

Can the 95-98 fuel rails bolt up to the 90-94 lines on a 90-94 manifold? Can STI sidefeed 550cc injectors fit in 95-98 Legacy rails? I don't think anyone has tried. Possibly.
1992 Legacy SS 5mt, build in progress
Josh Colombo wrote: Mon Jan 14, 2002 10:23 am Wait....I'm confused now.
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Re: Anything new for updating injectors?

Post by arse_sidewards »

The fuel rails use the same rubber hoses to jump from the engine to the body through at least '99 so fuel supply is a non-issue.

The injectors are all high impedance so even if the connector is different (is it?) that's a simple pigtail swap.

A 90-94 throttle body will bolt to a 95-99 intake.

All the accessory drive stuff is the same so no worries about the intake interfering there.

What am I missing?

The injector form factor our 1st gen cars use is kind of odd, it's a bastardized EV1 with the O-ring at the top of the fat part of the body. This is great for service life since the only part of the injector exposed to the elements is the electrical and fuel connectors but not great when it comes to interchanging with other applications or using common parts to keep aftermarket replacement costs low. In contrast, the 95-99 uses standard Bosch EV6 compatible injectors and you can run basically anything in their place as long as you have the right lb/hr and the right electrical connectors (with some potential for slight variations per OEM, most of which can be resolved by taking a file to the raised keys on the injector plug).
'93, '93 and '94 Legacy L, wagons, FWD and AWD, all are NA 2.2 w/ 4EAT.
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Re: Anything new for updating injectors?

Post by mike-tracy »

Idle air control comes to mind. The 90-98 injectors do indeed share the same plug, as does the STI sidefeeds (04-06?), so no issue there. What is known is the STI sidefeeds physically fit in *92-94 non turbo fuel injector rails. They do NOT fit in ej22t fuel rails.

That gets to the unknown part that I brought up

mike-tracy wrote: Sat Oct 30, 2021 5:48 am Can the 95-98 fuel rails bolt up to the 90-94 lines on a 90-94 manifold? Can STI sidefeed 550cc injectors fit in 95-98 Legacy rails? I don't think anyone has tried. Possibly.
1992 Legacy SS 5mt, build in progress
Josh Colombo wrote: Mon Jan 14, 2002 10:23 am Wait....I'm confused now.
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Re: Anything new for updating injectors?

Post by Legacy777 »

mike-tracy wrote: Mon Nov 01, 2021 7:37 pm What is known is the STI sidefeeds physically fit in 90-94 non turbo fuel injector rails. They do NOT fit in ej22t fuel rails.
Slight correction, the 92-94 non-turbo fuel rails work with the STi side feed injectors. There were two different injector types for the 90-91 non-turbo Legacies and such two different fuel rails that weren't necessarily compatible with the 92-94 non-turbo rails.
Josh

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Re: Anything new for updating injectors?

Post by mike-tracy »

Thanks for the correction Josh.
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Josh Colombo wrote: Mon Jan 14, 2002 10:23 am Wait....I'm confused now.
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Re: Anything new for updating injectors?

Post by Turbone »

Thanks for all the info guys. The PnP's in the PNW have lots of old Leggys in them, but I may have to travel a bit to find a MY92-94
A little off topic, but related to my engine build. I got rid of the hyd lifters and went solid. Grabbed a set from a 95 Imp, but screwed up and forgot to take the bolts also. Found out they were different lengths, so went back and grabbed them.
89 RX w/2.2T
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Re: Anything new for updating injectors?

Post by mike-tracy »

There was a couple 1st gen legacys in Pick N Pull Tumwater as of Nov 12
1992 Legacy SS 5mt, build in progress
Josh Colombo wrote: Mon Jan 14, 2002 10:23 am Wait....I'm confused now.
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Re: Anything new for updating injectors?

Post by Turbone »

mike-tracy wrote: Sat Nov 13, 2021 5:55 am There was a couple 1st gen legacys in Pick N Pull Tumwater as of Nov 12
Grabbed the fuel rails off one yesterday. Now I'm on the hunt for some 550cc + side feeds
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Re: Anything new for updating injectors?

Post by mike-tracy »

Nice!
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Josh Colombo wrote: Mon Jan 14, 2002 10:23 am Wait....I'm confused now.
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