02-24-2018, 12:53 PM | #99 | |
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I do suspect the torque dip is harmonics related based on the handful of things observed to change it, but I don't have the experience or background to be particularly confident. I wonder if a dual catted Ace 4-2-1 would perform nearly as well, but that's a wild curiosity that'll never be answered.
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Second chance build... or whatever it is.
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02-24-2018, 01:03 PM | #100 |
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These Toyota cars were a long time ago. There wasn't any real sports car offering before our platform. Why do you think they contact Subaru? At that time they were selling mainly small cars, hybrids, mini-vans and they had a strong ecological heritage. I don't consider Lexus a performance brand, but mainly a premium or luxury brand. The LFA is an exemption and the motor was developed with the help of Yamaha. So, not entirely a Toyota product.
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02-24-2018, 01:54 PM | #101 | |
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Regardless, your point is that going forward Toyota will be producing sports cars with torque dips designed in their motors to give those motors economy and performance. I guess we will see when the new Supra comes out if there is a dip. Of course the other explanation is that the torque dip is there as a byproduct of the other engineered components, and that the easiest thing to do is to market the dip as an intentional design to maximize fuel efficiency around town. |
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02-24-2018, 02:23 PM | #102 | |
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02-24-2018, 02:23 PM | #103 |
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I don't understand how this is still a discussion?? 100% standard car, remove internals of cat in header and torque dip is gone.
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02-24-2018, 05:25 PM | #104 | |
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If its tuned correctly the ecu should rarely have to intervene to pull timing, during normal operation with correct fuel |
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02-24-2018, 06:03 PM | #105 |
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02-24-2018, 08:41 PM | #106 |
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02-24-2018, 10:29 PM | #107 | |
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02-24-2018, 11:01 PM | #108 |
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Wow... this thread escalated so badly. From header and tune to blaming toyota. To keep on topic, a paper with a graph mean shit to op as long he is pleased on real scenario, in his case autocross. So im waiting patiently for his impressions /video
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02-24-2018, 11:54 PM | #109 | |
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- Anyone have the other Ace headers dyno tuned side by side? |
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02-25-2018, 08:54 AM | #110 |
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02-25-2018, 01:18 PM | #111 |
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OH SHIT! Somebody on the internet is wrong.
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02-26-2018, 10:16 AM | #112 | ||
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I've driven others, Ft86speedfactory, Borla, Fujitsubo etc. I should've changed my statement from all other to just the popular ones. I have not driven some crazy rare japanese headers or every single header out there, but definitely the most popular ones |
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