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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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04-25-2012, 03:42 AM | #29 | |
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But the low end penalty must always be paid for ridiculous top end power. (Hybrid-free, as nature intended, btw... heh...) Something, something, no replacement for displacement... except a compact electric motor?
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04-25-2012, 04:07 AM | #30 |
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I spent several minutes finding it heh.
http://trdparts.jp/english/parts_engine-3s-ge.html 13.5 compression, that would definitely help at high rpm where the fuel doesn't have as much time to burn. No replacement for displacement heh, I guess TRD proved that one wrong. A compact electric motor easily adds like 100Nm to the very bottom end, and it slowly tapers off but the gas engine comes alive as the rpms climb anyways. Cams and stuff can be done certainly, but I wonder how the intake tuning is done on these Subaru boxers since their configuration doesn't give options for shortening the intake runners. (I have no idea if they actually need to be shorter, but ITB trumpets are always short looking). One day when I have a real job and a car, oh god so much money is going to go into my random ass ideas. |
04-25-2012, 05:47 AM | #31 |
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1: There is no replacement for displacement.
2. The short rods hampering the rev range only come into play when the rest of the engine dynamics can be accessed... You can't look at a "estimated rod length" and stroke and say This engine can't make XXXXrpm reliably..Just doesn't work like that... As it sits power production from fueling becomes an issue due to piston in cylinder speeds we don't know the type of rod angles we're dealing with if it's working off of ej or fb architecture.....we don't know what kind of sideloads it'll have or if the pistons can deal with that type of constant G's due to lack of material etc etc etc |
04-25-2012, 06:37 AM | #32 |
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This is the problem with newer NA engines. It costs tons of money for only minor gains.
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04-25-2012, 07:27 AM | #33 | |
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I do believe in low levels of boost though. |
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04-25-2012, 09:26 AM | #34 |
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That's why if you buy this car you have to be happy with the stock output or close to it or else you will beat yourself up in the long run. I would love to drive it just to see how it feels in comparison to my RSX acceleration wise since that is the main part of my RSX I dislike.
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04-25-2012, 10:32 AM | #35 |
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04-25-2012, 10:42 AM | #36 | |
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04-25-2012, 11:08 AM | #37 | |
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04-25-2012, 11:10 AM | #38 |
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04-25-2012, 03:09 PM | #39 |
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Please explain the variable valve lift on the FA20.
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04-25-2012, 03:30 PM | #40 |
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I look forward to his response with amused eyes.
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04-25-2012, 04:31 PM | #41 |
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04-25-2012, 05:15 PM | #42 |
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Oh i'm sorry I thought he was saying it didn't have variable valve timing....my apologies there bud.
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