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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.

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Old 05-06-2012, 11:10 AM   #1
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Fr-s with subaru turbo?

So as rumors circulate there is talk that subaru is going to make a turbo for the brz while trd is in works for makeing a supercharger. My question is if subaru makes a turbo for the brz would it be a direct bolt on to the FA20 fr-s motor? I want forced induction but would rather have a turbo than a supercharger
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Old 05-06-2012, 11:12 AM   #2
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yup, probably....
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Old 05-06-2012, 11:27 AM   #3
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If they have the exact same engine, why wouldn't the same part fit on both?
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Old 05-06-2012, 11:48 AM   #4
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Thats what i thought. The ECU and everything is made by subaru isnt it? So it should be easy to put it everything in the fr-s
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Old 05-06-2012, 12:02 PM   #5
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Thats what i thought. The ECU and everything is made by subaru isnt it? So it should be easy to put it everything in the fr-s
As easy as it will be for the BRZ...
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Old 05-07-2012, 03:44 AM   #6
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It all depends how far they go on their turbo. If they release it as a aftermarket kit then yes. But most likely it will be a engine from a wrx.
Understand that impreza na has totally different internals than the wrx or sti. Its not just a turbo, its literaly Everything! There is no way you can directly bolt this on. Probably be easier with engine swap.
Supercharger might be a different story.
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Old 05-07-2012, 10:56 AM   #7
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If Subaru comes out with a Turbo BRZ, it's likely the engine won't be left as it is now. The engine would have lower compression pistons most likely, as well as other tweks like bgger injectors.

If you're thinking of bolting a turbo to your N/A FR-S, you'll have problems. Swapping the whole engine, on the other hand, would work.
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Old 05-07-2012, 12:15 PM   #8
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Any news on what Subaru is doing with the DI 1.6T they showed off beside the FA20 a while ago?

Impreza? BRZ STI? New car? Base WRX, and the WRX STI gets a 2.0T?
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Old 05-07-2012, 07:13 PM   #9
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I read a pretty interesting article in Motor Trend about this. They were implying that, amongst other things, Subie execs were actually leaning toward a supercharged setup sourced from TRD because the car is so light and RWD. Now this was a little blurb in an article talking about marketing the car from both companies(IIRC) but it did raise the question about whether a turbo would be the best option if you wanted a smoother powerband. Now me, I know little about turbo setups muself but I'd assume you could accomplish that somehow.
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Old 05-07-2012, 08:06 PM   #10
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even though were talking about the brz here the next WRX is rumored to get a electronic turbo so we might see that in the brz
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Old 05-07-2012, 10:50 PM   #11
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If they go w turbo... They have hellova stuff they need to figure out other than internal parts. Intake & exhaust relocation, TMIC or FMIC figuration, if it's FMIC redesign radiator, if it's TMIC they need to move the engine forward, & list just goes on & on
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Old 05-08-2012, 12:19 AM   #12
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If they go w turbo... They have hellova stuff they need to figure out other than internal parts. Intake & exhaust relocation, TMIC or FMIC figuration, if it's FMIC redesign radiator, if it's TMIC they need to move the engine forward, & list just goes on & on
Yea, this is why I think they'll stick with NA until not only have next generation forced induction and electronics have matured, but also when they are absolutely required to hit fuel efficiency goals. A very advanced electric turbo system would come with a whole host of power electronics, and to increase fuel efficiency I think they'd first be looking at hybrid systems before turning to downsizing+complex FI.
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Old 05-08-2012, 01:34 AM   #13
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Yeah, I'm not understanding how they could release a bolt-on supercharger (or turbo) that would work well with the current high-compression engine. Unless it only had 2 lbs of boost or required thick head gasket spacers.
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Old 05-08-2012, 10:12 AM   #14
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Yeah, I'm not understanding how they could release a bolt-on supercharger (or turbo) that would work well with the current high-compression engine. Unless it only had 2 lbs of boost or required thick head gasket spacers.
Direct injection helps prevent knock. It allows for a higher knock threshold than port injected engines.
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Old 05-08-2012, 10:27 AM   #15
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Thats what i thought. The ECU and everything is made by subaru isnt it? So it should be easy to put it everything in the fr-s
The ECU is made by DENSO, just to clarify. It may have Subaru stamped on it, but it's a DENSO unit.

Personally I think a supercharger is a much better fit for this car, if you want to keep it a smooth and responsive driver's car. While I've owned and driven a few turbocharged sports cars in the past, I can't say they were necessarily driver's cars. Maybe the RX-7 and Mazdaspeed MX-5; those are the only turbocharged driver's cars that come to mind.

/opinions.
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Old 05-08-2012, 04:07 PM   #16
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Im well aware that engine internals and such would have to be changed i guess what im wondering is if the ppl that buy the brz are able to go to subaru for an " upgrade" an have the turbo installed tuned etc etc could we with our fr-s got to subaru and do the same thing since the engines are the same?
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Old 05-09-2012, 12:57 PM   #17
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The ECU is made by DENSO, just to clarify. It may have Subaru stamped on it, but it's a DENSO unit.

Personally I think a supercharger is a much better fit for this car, if you want to keep it a smooth and responsive driver's car. While I've owned and driven a few turbocharged sports cars in the past, I can't say they were necessarily driver's cars. Maybe the RX-7 and Mazdaspeed MX-5; those are the only turbocharged driver's cars that come to mind.

/opinions.
Yeah, small turbos are OK. My 2G Eclipse has a tiny Garrett which is good. But most cars have medium-large sized turbos which have too much lag to be fun and responsive IMO.
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Old 05-16-2012, 11:19 PM   #18
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You can put a turbo or S/C on this car in stock form. Yes the injectors will have to get figured out. Since its a direct set up and the pressures are off the roof. But there is plenty of room on the FR-S/ BRZ to add a turbo in the same location as the wrx.

That being said. Once the ECU's are figured out, You would be able to bolt on a low boost turbocharger and run the car. 5-6 psi tops. But you will have to figure out the injector deal 1st.

Direct injection is not like the old days of the wally255 in a tank. These systems run at over 2800psi.
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Old 05-17-2012, 02:09 AM   #19
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You can put a turbo or S/C on this car in stock form. Yes the injectors will have to get figured out. Since its a direct set up and the pressures are off the roof. But there is plenty of room on the FR-S/ BRZ to add a turbo in the same location as the wrx.

That being said. Once the ECU's are figured out, You would be able to bolt on a low boost turbocharger and run the car. 5-6 psi tops. But you will have to figure out the injector deal 1st.

Direct injection is not like the old days of the wally255 in a tank. These systems run at over 2800psi.
So clearly the answer is actually no in a literal sense.
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Old 05-17-2012, 03:30 AM   #20
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So clearly the answer is actually no in a literal sense.
But the HKS S/C? I suppose they haven't actually told us what's really going on, but somehow I doubt that they developed new injectors and internals to make that thing work. As arghx7 noted, Toyota's dual fan spray injectors are quite unique.
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Old 05-17-2012, 03:40 AM   #21
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But the HKS S/C? I suppose they haven't actually told us what's really going on, but somehow I doubt that they developed new injectors and internals to make that thing work. As arghx7 noted, Toyota's dual fan spray injectors are quite unique.
Piggy-back.

Plus the developments parts display that had the headers also had cams, pistons and rods.
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Old 05-17-2012, 04:30 AM   #22
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Piggy-back.

Plus the developments parts display that had the headers also had cams, pistons and rods.
Ah. Thanks, didn't realize they were all part of the kit or whatever, 290hp on stock everything would be scary shit.
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