Too high compression to TC/SC??? - Scionlife.com



Scion FR-S Forced Induction Turbo and supercharger applications...

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Old 07-06-2012, 07:45 AM   #1
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Default Too high compression to TC/SC???

Ok, so I want to hear some feedback on this topic. I keep hearing, over and over from different sources, including friends with Scion international, that it is going to difficult to TC/SC the FRS/BRZ because of the very high compression ratio of 12 to 1. I keep hearing that in order to make forced induction practical on this car that you would have to drastically lower the compression. Being a NA vehicle. I myself am trying to get at least 250+WHP outta my baby and forced induction seems the way to go, but I get a little nervous when I keep heRing these things. What do you guys think?
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Old 07-06-2012, 01:48 PM   #2
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follow the p-tuning R&D thread on it. they're going to turbocharge that car. Also HKS has a supercharger kit on it.

having high compression doesn't mean you can't add forced induction, it just means you can't make as much power as you would when boosting an engine with low compression. I took my tC from 140 whp to 311 whp with a turbo kit because it is a low compression engine and it can take a lot of boost, with the FR-S, it'll probably be limited to say 80-110 whp increases with a turbo kit. But we'll just have to wait and see.
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Old 07-06-2012, 05:34 PM   #3
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Toyota's motorsports partner Gazoo Racing, is testing out a twincharger for it "which boosted the standard model's 2.0-liter flat-four boxer with the addition of both a turbo- and supercharger that lift output from 200hp to 315hp (320PS) and peak torque from 205Nm (151 lb-ft) to 421Nm (310.5 lb-ft)."
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Old 07-07-2012, 01:10 AM   #4
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my question is, but for how long? can the motor hang boosted.
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Old 07-07-2012, 02:40 AM   #5
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Exactly! Yes I'm sure it "can" and "will" be done but my fear is that, this is my daily driver, and I don't want to roast my motor at 60k miles! I want reliable performance HP that's not going to thrash my motor.
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Old 07-07-2012, 05:27 PM   #6
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Toyota is going to release an engine that doesn't last long right. Toyota knows what they're doing. They're testing it out for a reason. The direct injection will help out
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Old 07-07-2012, 05:44 PM   #7
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Quote:
Originally Posted by cessblood View Post
Toyota is going to release an engine that doesn't last long right. Toyota knows what they're doing. They're testing it out for a reason. The direct injection will help out
who built it, and what is the history of these engines? once you know the answer, then you will understand. testing only means what ever they break toyota has a replacement part waiting, race teams wont tell you how many motors they blow.
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Old 07-07-2012, 06:03 PM   #8
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Quote:
Originally Posted by cessblood View Post
Toyota is going to release an engine that doesn't last long right. Toyota knows what they're doing. They're testing it out for a reason. The direct injection will help out
I understand that Toyota makes the best motors, trust me I have sold Toyota and Scion for 9 years. Where you misunderstood me was, the concern of putting a turbo kit on and having it be hard on the motor since I'm driving my FRS everyday and the motor going out at low miles because of the turbo. And Ya'll should know, Toyota/Scion is not currently planning on releasing a turbo/supercharger for this car, neither is Subaru. It will be done though. Greddy has one in the works rite now. I cant wait to see it.
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Old 07-07-2012, 07:10 PM   #9
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Look, i'm sure the engine will hold up fine and will put out some great numbers. One thing toyota and subaru do well is build very strong reliable engines. the higher compression means that the amount of power you can add with a turbo or supercharger will be limited more than lower compression engines because of the detonation resistance of pump gas. But a good tune on a properly maintained car will go the distance just like other boosted scions/toyotas/subarus.
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Old 07-08-2012, 06:07 PM   #10
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with california 91 octane, i say meth injection, ethanol or octane boost will be needed for insurance.
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Old 07-09-2012, 08:48 AM   #11
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There is no way that I'd ever turbocharge a stock FA20. I'd supercharge one but never risk a turbo without lowering the CR first. Boost can creep or spike, wastegates can fail and 12.5:1 doesn't leave much margin for error.
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Old 07-12-2012, 04:49 PM   #12
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I remember when people said the tC1 and the S2000 couldn't handle boost. Look at them now. Fres86 I think you should wait a little longer and get more info before you make your final judgement.
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Old 07-12-2012, 05:31 PM   #13
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High compression doesn't mean it won't handle boost. Just means it will be less boost ran on it.
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Old 07-12-2012, 05:35 PM   #14
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Quote:
Originally Posted by Fres86 View Post
I understand that Toyota makes the best motors, trust me I have sold Toyota and Scion for 9 years. Where you misunderstood me was, the concern of putting a turbo kit on and having it be hard on the motor since I'm driving my FRS everyday and the motor going out at low miles because of the turbo. And Ya'll should know, Toyota/Scion is not currently planning on releasing a turbo/supercharger for this car, neither is Subaru. It will be done though. Greddy has one in the works rite now. I cant wait to see it.

Are you pedal to the metal everyday? You do understand that you can drive a turbo car without even hitting boost right?
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250, 250cc, atleast, compression, forced, frs, high, induction, kit, scion, tc, turbo, turbocharging, whp, xb35

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