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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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09-17-2011, 03:07 AM | #15 | |
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Quote:
http://www.sae.org/automag/techbrief...1-114-1-17.pdf |
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09-17-2011, 06:09 AM | #17 |
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2GR-FSE was 11.8:1 says that article...I think they can beat that this time around. I'd guess approximately 12:1. More would be awesome
So that article seems to say that D-4S achieves very good fuel mixing and combustion efficiency compared to your typical fuel injector setup. Now the GR engines were rev limited pretty low as I remember, but someone said it's possible to get a crapton more power out of them. Does this require new cams though? I definitely remember looking up that motor, torque drops off towards its low redline, sounds like cams weren't that aggressive. |
09-17-2011, 09:33 AM | #18 | |||
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Yeah.. these engines have a shit ton of power corked up in them and might even be slightly underrated. I think I need to buy me and engine brake setup and a couple 2GRs.. someone needs to crack this puzzle... |
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09-17-2011, 12:42 PM | #19 |
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So no word on who is actually providing the ECUs yet? I doubt each model to have its own, though its a possibility.
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09-17-2011, 01:11 PM | #20 |
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That would be silly for a badge engineering job. Unnecessary work to create two different ECU's for what is mechanically the same car.
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09-18-2011, 10:13 AM | #21 |
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I think what will happen is that it will be a toyota ecu, but the plugs that connects to the body and transmission harness (subject to configuration of course) will be Subaru spec. Why? If they are going to make it so "easy" to plop in a Subaru EJXXX motor, might as well make it easy to just take a subbie ECU, engine harness and plug em up. Couldn't get easier than that. It is however, very wishful thinking.
Why wouldn't it be a Subaru ECU/Software running the whole shebang? D4-S. |
09-18-2011, 01:38 PM | #22 |
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09-20-2011, 04:00 AM | #23 | ||||
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With D4s you can upgrade injectors easier and you can always upgrade the fuel pump but the tuning is a whole separate issue. Quote:
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Heh. Does Denso usually supply ECUs for Toyota and Subaru? |
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09-20-2011, 09:53 AM | #24 |
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Do you mean Subaru ECUs? They are the same between JDM and USDM AFAIK, there is only AVCS and non AVCS ECUs that you have to watch out for. You can get a JDM EJ207 and run it off a 2002 USDM WRX ECU, you just have to make your own AVCS wiring bundle and obviously a new ROM.
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09-20-2011, 01:42 PM | #25 |
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Yep. OEMs never design their own ECUs, it's all outsourced to suppliers like Denso, Delphi, Bosch, Magneti Marelli, etc. Look at the labels on any ECU, there will be a logo for the vehicle manufacturer, and a logo for the ECU manufacturer.
To the best of my knowledge, Denso supplies ECUs for all of the turbo Subarus and some of the N/A ones as well. On top of that Denso is a part of the Toyota Group, so it seems like a pretty safe bet that they supply the majority of Toyota/Lexus ECUs as well (I don't have any first hand knowledge though). |
09-20-2011, 06:09 PM | #26 | ||
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Eg. even across a small manufacturer like Subaru the ECUs are not all designed to be compatible especially in different markets where they have offer different engines. Am I right? |
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09-21-2011, 03:41 AM | #27 |
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I never suggested anything of the sort. I simply stated that Denso supplies ECUs to both Toyota and Subaru, and will likely supply the ECUs for this new car.
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09-21-2011, 01:53 PM | #28 | |
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I was talking in regards to similar ECUs and BCMs. |
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