03-29-2012, 03:25 PM | #99 |
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Like EZ engine?
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03-29-2012, 03:35 PM | #100 | |
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03-29-2012, 05:14 PM | #101 |
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The BRZ does not have to keep 86x86, because it is not the Toyota 86. They could make it oversquared, and I am sure it is possible, as I heard plans of NA engine-kits from various tuners. Changing bore is possible, BMW changed stroke on the M3 GTS E92 and M3 CRT E90 while keeping exactly the same engine, capacity went from 4.0l to 4.4l.
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03-29-2012, 06:13 PM | #102 |
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I know there are benefits to changing the bore, I am just asking if Subaru really wants to deviate from the plans of their new business (capital) partner right now. If Toyota has given them their blessing, I guess the point is moot.
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03-29-2012, 06:30 PM | #103 |
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Nah lift can pass emissions, new Honda engines still have variable lift. I think it's a matter of most manufacturers feeling like it's not worth it, they'd rather just lose some top end, or lose some low end torque, and save the money (I don't know how much they save, this is speculation).
The rod ratio is quite bad already so stroking it would likely lose some revs, and the specific output would go down. Boring it out slightly to 2.2L could make 250ps more easily achievable, more top end focused cams/intake could put the 7000rpm torque at perhaps 175 lb-ft, peak power at 7500, that would get you around 240hp. Still would need more revs though. 8500rpm would make things pretty easy, but I'm guessing that takes rather extensive modifications. |
03-30-2012, 04:36 AM | #104 | |
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03-30-2012, 04:53 AM | #105 |
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You're talking about the turbo motor right? EJs have a shorter stroke, so the revs probably come a bit easier than the FA, which has very short rods too.
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03-30-2012, 06:05 AM | #106 |
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EJ207 turbo, correct. Can't recall if it's 8000 or 8500, but the good version of the engine (V7, 2001ish) had forged crank and pistons in addition to twin-scroll, DAVCS, and possibly big port heads.
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03-30-2012, 07:25 AM | #107 | |
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You could easily fit a massive intercooler in there. Personally i believe the engine bay could comfortably take a 6-cylinder engine (V6 Mind, not inline of course). So i call BS on the AutoExpress artile |
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03-30-2012, 01:35 PM | #108 |
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does that mean 250 hp n/a!? dayum how would they do that? they'd have to increase displacement!!!
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03-31-2012, 04:53 PM | #109 | |
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A bored out version of the same engine in the same generation with both versions selling simultaneously seems like wishful thinking to me.
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03-31-2012, 04:59 PM | #110 |
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Are you looking for specific instances where ONLY bore was changed?
In 2004 and 2005 the Subaru STI was sold with the EJ257 (99.5:79)engine for USDM; at the same time the the WRX was still using the EJ205 (92:75). The EJ25x series is essentially a bored out EJ20x series. |
03-31-2012, 05:20 PM | #111 | |
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04-01-2012, 02:37 PM | #112 |
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more reason for me to wait. i'd rather pay a bit more for the STI version.
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