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Bolt on turbo upgrade for BC5?


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#1 tintop

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Posted 25 March 2013 - 5:11 AM

New to the world of Subaru's, tried to search, but the lovely search engine doesn't like words with less than four letters.

What I want to know is that what turbo can I bolt onto my BC5 RS ? I have owned a few Toyotas in the past, and they have turbos you can literally just bolt up and have a marked improvement in performance and response with no changes to anything else.

I want the car to remain as visually stock as possible, and do not want a noisy drain pipe out the back, I understand that a divorced/siamese downpipe works wonders so will be fitting one of those as well.

#2 Reuben

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Posted 25 March 2013 - 5:27 AM

All VF's will physically fit, including a bunch of TD's, but for true un bolt-bolt in swaps, you can go with any VF or TD that has the 90º upwards bend on the intake. This includes the two legacy turbos, the tiny VF10, the modest VF8, and some impreza turbo's, the small TD-04, and the STi monstrosity, TD-05.

The TD-05 will be the upgrade turbo you've imagined, it came on V2 STi's. It's not the most common, as it is a very popular turbo, due to it's ease of bolt in to the first gens.
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#3 Pelvin

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Posted 25 March 2013 - 5:31 AM

All VF's will physically fit, including a bunch of TD's, but for true un bolt-bolt in swaps, you can go with any VF or TD that has the 90º upwards bend on the intake. This includes the two legacy turbos, the tiny VF10, the modest VF8, and some impreza turbo's, the small TD-04, and the STi monstrosity, TD-05.

The TD-05 will be the upgrade turbo you've imagined, it came on V2 STi's. It's not the most common, as it is a very popular turbo, due to it's ease of bolt in to the first gens.

I think he's after a straight bolt on with no further mods required, a TD-05 surely would need a few bits done. But going off what I've just heard today a TD-04 can be straight swapped.
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#4 h8wrx

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Posted 25 March 2013 - 5:39 AM


All VF's will physically fit, including a bunch of TD's, but for true un bolt-bolt in swaps, you can go with any VF or TD that has the 90º upwards bend on the intake. This includes the two legacy turbos, the tiny VF10, the modest VF8, and some impreza turbo's, the small TD-04, and the STi monstrosity, TD-05.

The TD-05 will be the upgrade turbo you've imagined, it came on V2 STi's. It's not the most common, as it is a very popular turbo, due to it's ease of bolt in to the first gens.

I think he's after a straight bolt on with no further mods required, a TD-05 surely would need a few bits done. But going off what I've just heard today a TD-04 can be straight swapped.


A TD05 off a v1-v2 wrx is a direct bolt up, no mods required
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#5 boostin

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Posted 25 March 2013 - 5:50 AM

TD05 is the way to go. Fully rebuildable, heaps of upgrade parts available too. I picked my one up for $90 on Trade Me.
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#6 FBSBC5

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Posted 25 March 2013 - 6:26 AM

well it depends on how good you are working on your own car,the vf 8,10, tdo4-5 with 90deg elbow are straight bolt ons with no mods required, vf 22,23,24,29,30,34 and 35 are straight entry, you could weld a 90deg elbow on them and that would be all you have to do or keep them straight entry and then you would be changing intake manifold for the v3-4 intake which is not a biggy plus the power steering pump off same model

#7 h8wrx

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Posted 25 March 2013 - 6:34 AM

i have a cheap vf23 for sale btw ;)
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#8 DacerX

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Posted 25 March 2013 - 6:46 AM

Stop reminding me
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#9 91RSWagon

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Posted 26 March 2013 - 3:37 AM

So if you change from a vf turbo to a td do you have to change the downpipe as well?

#10 FBSBC5

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Posted 26 March 2013 - 4:01 AM

So if you change from a vf turbo to a td do you have to change the downpipe as well?


nope

#11 THE UNDERTAKER

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Posted 26 March 2013 - 4:38 AM

TD05 is the way to go. Fully rebuildable, heaps of upgrade parts available too. I picked my one up for $90 on Trade Me.


+1 there. Would be direct bolt on , just make sure you get the water & oil pipes with which ever turbo you decide apon. Best to buy 1 from a running car. As there are many being sold out there at the momment that would last 5min if that. In some cases just buy 1 with blown oil seal. You can do general checks to indecate if somethings wrong. Just my 2c worth

#12 boostin

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Posted 26 March 2013 - 4:44 AM

Oh and the oil feed bolt on top is different on the TD05. Larger hole for more oil flow. Not sure about TD04 though sorry.
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#13 Damo

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Posted 26 March 2013 - 4:53 AM

Oh and the oil feed bolt on top is different on the TD05. Larger hole for more oil flow. Not sure about TD04 though sorry.


The TD-04 is the same as the VF8 and 10
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#14 Decimate

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Posted 26 March 2013 - 6:31 AM



All VF's will physically fit, including a bunch of TD's, but for true un bolt-bolt in swaps, you can go with any VF or TD that has the 90º upwards bend on the intake. This includes the two legacy turbos, the tiny VF10, the modest VF8, and some impreza turbo's, the small TD-04, and the STi monstrosity, TD-05.

The TD-05 will be the upgrade turbo you've imagined, it came on V2 STi's. It's not the most common, as it is a very popular turbo, due to it's ease of bolt in to the first gens.

I think he's after a straight bolt on with no further mods required, a TD-05 surely would need a few bits done. But going off what I've just heard today a TD-04 can be straight swapped.


A TD05 off a v1-v2 wrx is a direct bolt up, no mods required


He may have meant no supporting mods ie fuel, ecu? I dunno. But yeah bang for buck on a BC5 - TD05 - <$200 away laughing. You only need to look at some of the many, many flow ratings out there to see how much they'll huff through compared to TD04, VF8, 10, hell... even 28, 30 and 22
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#15 boostin

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Posted 26 March 2013 - 6:37 AM

The stock TD05 is a small 16G. You can buy wheels and compressor housings for big 16G, 18G, 20G and even 25G quite cheaply.

http://stores.ebay.c...u/kando-dynamic
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#16 Reuben

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Posted 27 March 2013 - 7:02 AM

The V2 STi's that ran a 90º TD-05, also ran an EJ20G with grey top injectors. A factory EJ20G can happily support a stock TD-05 on a stock motor, at stock boost.
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<Shale>: Blighter doesn't really have an accelerator pedal, it's more just a loudness pedal. You can change volume, but you won't go any faster.


<mjlqtown>: (Southern US accent) I'v excised the demon! This car is now clear!


<Reuben>: I feel like when you stomp the throttle in Blighter, it's like you've startled an old man!

#17 Familyman

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Posted 27 March 2013 - 7:18 AM

Stock boost? What is this term you speak of?
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#18 boostin

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Posted 27 March 2013 - 7:26 AM

Stock boost? What is this term you speak of?


It's this thing that happened in the 90's. Didn't last long, much like Vanilla Ice.
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#19 DacerX

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Posted 27 March 2013 - 7:33 AM

oh god lets not let that repeat again
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#20 kamineko

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Posted 27 March 2013 - 7:41 AM

Stock boost? What is this term you speak of?


word. if you have a free flowing turbo back exhaust, factory boost control won't keep up with the TD05 and you'll boostcut.

couple it with an EBC until you decide to go the whole way with an ECU etc




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