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Old 11-07-2008, 02:47 AM   #1
00boostedRS
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Default Anyone running a TD04 or 5 on their Legacy SS?

Im just getting ideas how to get some more HP from my SS. Ill be getting a 3 inch downpipe and catback fabbed as well as running a Perfect power SMT6 most likely but will a TD04 give me near 300 crank or will I need to step up to a TD05 or VF equiv? The only HP limitations is the car is running an automatic which I plan on swapping out for a 5 speed 3.90 geared unit. With the bolt ons Im planning on running can the auto handle it?
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Old 11-07-2008, 02:52 AM   #2
i_c_the_light
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Are you intercooled at all?

You want 300 crank you'll probably want more than a little TD04. VF-8 is probably more suitable.
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Old 11-07-2008, 12:30 PM   #3
00boostedRS
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yeah ill be running an 06 WRX top mount, thanks for the advise though
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Old 11-07-2008, 02:19 PM   #4
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whats the maximum safe boost psi on the SS without needing a retune?
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Old 11-16-2008, 02:50 AM   #5
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12psi on a vf11, that is fuel cut.
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Old 11-20-2008, 03:54 AM   #6
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im still looking for a waste gate actuator for my td04(going in an ej22k) since the wastegate opens at 10 psi and fuel cut is like at 12-13 psi

i heard the wate gate actuator from the early subarus fit likr the xt-6 turbo but im not 100% sure with turbo im supposed to get
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Old 11-20-2008, 09:21 AM   #7
Matt Monson
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I used to run an early Td04 with 90 degree inlet from a JDM WRX wagon on my car with a slanty intercooler. It was a good bump in power at stock boost levels. I tracked it like that and held my own with stock WRX's. But it won't be long before you decide it's not enough.

The thing is that on that car all the power is in changing the heads. I put an Ej20G into the car (thereby dropping my discplacement .2l) and kept the same turbo and intercooler. The car immediately put down 170whp on our local dyno. This is a dyno where stock 2.0l USDM WRX's put down 155whp. If you want to do some rough math, that suggests I was making 240chp @12psi from that turbo with no other modification than a bellmouth downpipe.
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Old 11-20-2008, 06:19 PM   #8
i_c_the_light
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Quote:
Originally Posted by Matt Monson View Post
I used to run an early Td04 with 90 degree inlet from a JDM WRX wagon on my car with a slanty intercooler. It was a good bump in power at stock boost levels. I tracked it like that and held my own with stock WRX's. But it won't be long before you decide it's not enough.

The thing is that on that car all the power is in changing the heads. I put an Ej20G into the car (thereby dropping my discplacement .2l) and kept the same turbo and intercooler. The car immediately put down 170whp on our local dyno. This is a dyno where stock 2.0l USDM WRX's put down 155whp. If you want to do some rough math, that suggests I was making 240chp @12psi from that turbo with no other modification than a bellmouth downpipe.
Hold the phone. I thought that the WRX dumped out 227 at the WHEELS factory.
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Old 11-20-2008, 06:36 PM   #9
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nope 227 at the crank... my car made 177whp stock on a mustang dyno
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Old 11-20-2008, 06:40 PM   #10
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So it's worse than I thought. JDM Legacy RS from 1989-1992 = 220HP at the crank.
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Old 11-20-2008, 06:43 PM   #11
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so they prolly make anywhere from 150-170whp in stock form depending on how healthy the motor is
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Old 11-20-2008, 06:59 PM   #12
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At 13PSI, my '90 Legacy GT absolutely monsters a V2 WRX, and they are 240 at the crank.
When I get my chipped ECU in, my Legacy will be looking at a MINIMUM of 210 at the wheels.

You guys got it **** for starters.
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Old 11-20-2008, 08:57 PM   #13
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Quote:
Originally Posted by Blacksails192 View Post
nope 227 at the crank... my car made 177whp stock on a mustang dyno
That sounds about right for a Mustang. Our local dyno is a Dyno Dynamics and thus the lower baseline numbers. For comparison, a stock NA 2.5RS puts down around 95whp on our dyno. On a mustang you often see 2.5RS's as high as 130whp.
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Old 11-20-2008, 09:16 PM   #14
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i was under the impression a dyno dynamics rear higher than a mustang... mustangs are typicaly the must acurate reading dynos... dynojets are the highest reading
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Old 11-20-2008, 10:39 PM   #15
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Dyno Dynamics are the lowest reading dyno also known as wthe heartbreak dyno. Claimed 1000whp Supras put down like 800 or less on these dynos. A friend of mine with tons of bolt-ons and a custom Rocket Rally tune only laided down 270whp on the same dyno in his 05 STI.
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Old 11-21-2008, 09:18 AM   #16
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Quote:
Originally Posted by Blacksails192 View Post
i was under the impression a dyno dynamics rear higher than a mustang... mustangs are typicaly the must acurate reading dynos... dynojets are the highest reading
dynojet =/= dyno dynamics
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Old 12-03-2008, 07:24 PM   #17
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ok so i can up the boost to 12 psi without messing with the ecu and be safe? I have an 06 wrx topmount IC ill be installing soon as i can get a bov. Far as hp numbers all im looking at is 350 at the crank. will i need 550cc injectors? are the ej22t heads workable at that power range or do i need ej20g or ej20tt heads? would a vf39 or vf22 be more suitable?
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Old 12-03-2008, 07:59 PM   #18
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vf22 is the only turbo of the three you are considering that has a snowball's chance in h3ll of hitting your hp goal. And it won't happen on the stock heads. Or the stock ECU....
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Old 12-03-2008, 08:08 PM   #19
00boostedRS
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i wasnt planning on using just the stock ecu, i was planning on using either a perfect power smt6 or a link. on the heads i was going to use ej22tt's. is the vf39 that much smaller than the vf22?
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Old 12-04-2008, 12:01 PM   #20
Matt Monson
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My bad. I was thinking whp. Either the vf39 or vf22 will do it at the crank. Go look around on Legacy Central for feedback on the smt6. A number of people have gotten frustrated with it. Personally, I would just use a Power FC and convert the ignition over to COP.
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Old 12-04-2008, 05:26 PM   #21
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Quote:
Originally Posted by Matt Monson View Post
....... Personally, I would just use a Power FC and convert the ignition over to COP.
Or use a Power FC and keep the wasted spark coil-pack. There is a write-up on Legacy Central.
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Old 12-04-2008, 09:08 PM   #22
i_c_the_light
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Quote:
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My bad. I was thinking whp. Either the vf39 or vf22 will do it at the crank. Go look around on Legacy Central for feedback on the smt6. A number of people have gotten frustrated with it. Personally, I would just use a Power FC and convert the ignition over to COP.
Yeah I was gonna say!
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Old 12-04-2008, 09:58 PM   #23
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Originally Posted by RallyColtTurbo View Post
Or use a Power FC and keep the wasted spark coil-pack. There is a write-up on Legacy Central.
Different strokes for different folks. I'll take a brand new coil with a built in ignitor over a 25+ year old coil and ignitor any day if I'm going to go to the trouble of a standalone.
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Old 12-04-2008, 10:02 PM   #24
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do the COP's make better spark than the pack?? that pack can blast like 2 inch sparks for petes sake (trust me I know from experience)
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Old 12-04-2008, 11:49 PM   #25
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Almost all OEMs have gone to COPs, or a COP/wasted spark hybrid. I can't comment on why...could be cost, performance, smog..anything really. But the fact remains, they have gone to them.

Staying with the wasted spark coil-pack means you don't have to run more wires (possibly pulling the dash/heaterbox). Going COP means you can update to the newest(best?).

I'm with Matt, if you were wiring in a stand-alone. Go with the COPs. But the beauty of a Power FC in a BC (Legacy) is you don't have to wire, if you choose not to. Well, major wiring.

My SS runs on a Power FC by adding 2 pins to the ECU connector, adding an ignitor, moving 1 additional pin at the ECU and making a 'bypass' ignitor for under the hood.

My other SS has the extra wires added. It involved sourcing a junkyard BC/BF harness, stripping out about 6 wires from it, pulling the dash and heaterbox, adding the formentioned wires to the now exposed harness, doing the same for the harness under the fender, repinning about 12 pins on various connectors, and modifing the engine harness to COPs. The upside is it looks totally factory when done. The previous option has a 'new' ignitor hiding under the dash, if somebody was to look.

Last edited by RallyColtTurbo; 12-05-2008 at 12:05 AM.
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