04-15-2018, 09:36 PM | #1135 | |
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As for the 2017+ cars, they dyno'd at more like 10-15whp over stock 2013-2016 cars. Realistically the early cars were more like 190hp, and the 2017+ are a more accurate 205hp.
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04-16-2018, 02:05 AM | #1136 | |
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04-16-2018, 09:49 AM | #1137 | ||||
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04-16-2018, 10:15 AM | #1138 | |
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Do you have better tires? Wouldn't that account for a lot of the acceleration differences you are talking about? |
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04-16-2018, 10:42 AM | #1139 | |
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04-16-2018, 11:21 AM | #1140 | |
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I didn't measure all the before and after changes, so I cannot tell which one gave the most. My last change was a lightweight flywheel change which gave a 6% gain in a 2nd gear pull. Details here: http://www.ft86club.com/forums/showp...7&postcount=74 |
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04-16-2018, 12:21 PM | #1141 |
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But even +15hp for '17+ seems very optimistic to me. Mag tests showed about a tenth of a second improvement in 0-16 and 1/4-mile which could be attributed to diff ratio change from 4.1 to 4.3. 1/4-mile trap speed unchanged, which suggests no additional power. Or only enough to offset a slight weight gain.
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04-16-2018, 12:37 PM | #1142 | |
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In other regions same trim levels were ~20kg lighter. And a 4.3 fd doesn't mean that will make you EVERYWHERE faster. In certain tests it can give worse results comparing to a 4.1 fd. It depends the test. |
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04-16-2018, 01:03 PM | #1143 | |
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Yeah, about 50 lb. But it's not enough to allow for '17+ cars having +15 more hp, more like the advertised +5hp
Power/weight with driver: pre-'17 (2770 lb. + 170 lb.)/200hp = 14.7 lb/hp '17+ PP (2820 lb. + 170 lb.)/205hp = 14.6 lb/hp Quote:
0-57mph, 4.1 would have a HUGE advantage, on the order of 1/2 a second, due to no 2-3 upshift. But that's not the case here. |
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04-16-2018, 01:26 PM | #1144 | |
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If you want to cry about exhaust emissions, point your ire towards the soot emitted by direct injection gasoline engines. Which is considerably worse for the environment, and yet also legal.
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04-16-2018, 02:30 PM | #1145 | |
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A catalytic converter is still vital to reduce CO and NOx emissions. There's no other solution out there that is as simple and as cost effective. |
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04-16-2018, 02:37 PM | #1146 | |
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You are correct. It depends also WHEN the tests were performed. Check a dyno test of a stock '17 BRZ here: http://www.ft86club.com/forums/showp...28&postcount=1 On first run the AFR is similar to an aftermarket tune. On second run it starts adding fuel, the AFR is getting similar with pre-'17 cars and it loses power. This is also the reason why we never agreed in the forum if the actual gain was +5hp or +15hp. I mean apart from catalog numbers. Last edited by nikitopo; 04-16-2018 at 02:56 PM. |
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04-16-2018, 02:57 PM | #1147 | |
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Fact is, 2017+ cars are testing at the same 1/4-mile trap speeds vs the previous cars, and lo the weight difference between non-PP Limiteds isn't all that much after all, 2764 lb. for 2013 and 2777 lb. for 2017: https://www.caranddriver.com/reviews...ed-test-review https://www.caranddriver.com/reviews...al-test-review 1 tenth quicker, 0mph faster in the 1/4 at the same weight. I don't think the 17+ are making much if any more real-world usable power. |
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04-16-2018, 03:11 PM | #1148 | |
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