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02-07-2012, 06:42 AM | #1 |
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Power Torque Curve, CAN Bus
Havene't seen this posted yet...
ft86club is reporting more details about the previously rumored CAN Bus (which sounds too good to be true from OEM): http://www.ft86club.com/forums/showthread.php?t=3603 And the power torque curve is supposedly on the JDM BRZ site (though I haven't seen where the source image came from myself): http://www.ft86club.com/forums/showthread.php?t=3583 The original (note torque units should be N*m, not kg*m): Converted to English units:
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02-07-2012, 07:44 AM | #2 |
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I assume this was measured at the Crank?
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02-07-2012, 08:23 AM | #3 |
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170 HP at the wheels, based on a screencap:
http://www.ft86club.com/forums/showthread.php?t=3416 http://www.ft86club.com/forums/showpost.php?p=120310 http://www.ft86club.com/forums/showpost.php?p=120333 http://www.ft86club.com/forums/showpost.php?p=120350 http://www.ft86club.com/forums/showpost.php?p=120485 |
02-07-2012, 01:27 PM | #4 |
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what's up with that torque drop at 4k rpm?
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02-07-2012, 02:19 PM | #5 |
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^I think its the transition from DI to port injection.
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02-07-2012, 09:24 PM | #6 |
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^Did you mean port to direct injection? It looks a Honda power band
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02-08-2012, 11:50 AM | #7 |
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Instead of "V-TEC!!!" we can scream "DEE-EYE!!!"
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02-08-2012, 03:19 PM | #8 |
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Lovely almost Flat from 3-7k RPMs.
This is gonna be fun |
02-10-2012, 11:22 PM | #9 |
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that torque curve is gonna feel:
slow slow, fast, slow again(wtf), fast, fast, it's over? that torque curve drop just looks NASTY! I hope some tunning fixes that crap, this car can't afford to lose any more torque. |
02-11-2012, 08:05 AM | #10 |
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Wheel torque vs speed, based on BRZ JDM website and specifications
Last edited by Deslock; 02-11-2012 at 09:21 AM. |
02-11-2012, 08:42 PM | #11 |
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Here's a rough estimate for comparing acceleration of the BRZ and WRX. As expected, once the WRX hits boost the BRZ never matches it. Still, I was a little surprised to see that:
Last edited by Deslock; 02-13-2012 at 08:42 AM. |
02-11-2012, 10:27 PM | #12 |
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The dip has been one of the biggest things all the reviewers seem to say 'wtf' to. They have all said it's entirely noticeable. Oh well...guess it just means keep the revs above 4200 which shouldn't be that hard on a track.
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02-13-2012, 08:36 AM | #13 |
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GTI
Last edited by Deslock; 02-13-2012 at 08:44 AM. |
02-13-2012, 10:22 AM | #14 | |
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Quote:
Desklock.. loving the graphs. What WRX is being used in post #11? |
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02-13-2012, 09:29 PM | #15 | |
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Quote:
http://www.clubwrx.net/forums/engine...dyno-pull.html |
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02-14-2012, 07:48 AM | #16 |
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Any chance you could do the same with a 02-05 WRX?
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02-14-2012, 11:10 AM | #17 |
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The dynos I found for the stock 2.0L WRX are pretty weak... I based this on the strongest one in this thread, and it still looks slower than it should. If you find a better stock dyno, post a link and I'll redo the plot.
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02-14-2012, 05:14 PM | #18 |
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170whp is about right for a WRX with a TD04. It might be very slightly low.. but not much. I hope this brings things into perspective for those saying it doesn't have enough power to have fun with.
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02-14-2012, 09:13 PM | #19 |
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Completely pointless statistics. Comparing WOT pull speeds in completely wrong gears. Let's be real; the WRX stomps the BRZ. Haters gonna hate, it's a bad buy for the money. The WRX is more everything.
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02-14-2012, 10:15 PM | #20 | ||
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Quote:
One of the guys there had a sedan that ran a 14.2 if memory serves. I don't see the BRZ doing better than that, so I think the accelerate plot favors it too much. I took a look at the BRZ dyno screencaps mentioned above, and the scale is difficult figure out, but I'm guessing the real-world BRZ curve won't be quite as good as the acceleration plots indicate, at least down low. But even the worst case interpretation of that dyno has it being faster than the 2.0L WRX (except for the WRX's mid-range boost). Another mystery is top speed. Several sources have said ~136-140 MPH drag limited, and in GT5 it tops out at 137 MPH. But from the calculations, it ought to be able to go almost 150 MPH. Not that it matters... I'll never drive it anywhere near those speeds, even if it's not governed. My concern is only that it casts doubt on the rest of the numbers. Quote:
Beyond that, your post is pointless and trollish. Welcome to my ignore list. |
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02-14-2012, 11:39 PM | #21 | |
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As for the comparison, I don't see why it's so hard to believe that the lighter 170whp car could be as fast if not faster. |
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02-15-2012, 08:01 AM | #22 |
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Acceleration in a straight line is not a big concern for me.
The BRZ was built as a low slung sports car that is easily tossable on a road course. The WRX was built for all weather performance driving (Rally). These cars were built with two completely different philosophy's in mind, so it's pointless to compare the two. |
02-15-2012, 11:53 AM | #23 | ||
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Quote:
And to clarify, no one should draw conclusions from any of this... I've been posting purely because it's fun to speculate and compare. Quote:
I think part of the problem is that published power curves often show more low-end than dynos. So I plotted again, but this time vs the BRZ dyno screencap. Because the scale of the dyno screencap is unknown, and the curve doesn't quite match the published dyno, some guesswork is needed. Here's what a couple users speculated at ft86club: Because it has significantly more midrange output than the published curve, I'm dismissing it as unrealistic. Next up are plots using a more conservative estimate of the screencap scale. It's also questionable because some runs appear to go way past 7500 RPM (but I didn't use them): This is more like what I've been expecting all along, at least in the mid and high RPM range. This as probably the worst case scenario, and I won't be surprised if it's in-between this and the other plots. Again, all of this is speculative. Here are plots with the conservative dyno scale vs the current GTI and WRX: |
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02-21-2012, 12:34 PM | #24 |
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It actually looks like the standard Subaru drop in their tunes. I've seen it in a lot of their tunes from the factory. Just hope Cobb comes out with an AccessPort soon.
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02-21-2012, 04:19 PM | #25 |
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Until and unless you drive it up here at 10,000 ft elevation, then the N/A BRZ will really suffer compared to the WRX.
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