02-23-2018, 08:11 PM | #71 | |
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I'm of the belief that the torque dip is a product of a 12.5:1 compression motor trying to avoid knock, something that could be alleviated with a long tube catless header, but they need a precat, and they need to heat the precat fast during cold starts for emissions, something that a long tube header doesn't allow. |
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02-23-2018, 08:21 PM | #72 | |
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Are you saying the Motec system doesn't use the knock sensors to automatically adjust timing/etc to avoid knock?...that the Motec system only runs on set parameters like open tune only (maf only)?...did I butcher that? |
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02-23-2018, 08:23 PM | #73 |
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At least we know the solution. Imo Toyota could come out and explain the torque curve to us and we'd still argue it. For whatever reason, the oem header was/is a compromise.
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02-23-2018, 09:22 PM | #74 | |
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E85 is much more knock resistant. Still has dip. http://www.ft86club.com/forums/showthread.php?t=52326 It is pretty easy to discredit the thought that the factory tune causes the dip, when tuned cars still have it. There is so much more that we don't have answers for so there are a lot of assumptions. I know bore to stroke changes VE. We also do not know how the FB is cammed vs the FA which would also play a large role. I have a feeling it is significantly different just based on what red line is between the two. |
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02-23-2018, 09:47 PM | #75 |
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Correct, either way it's not just in the tune as someone else said previously. In another thread on here all they did was punch out the internals of the cat and torque dip was gone. Don't think it gets any more conclusive than that.
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02-23-2018, 09:50 PM | #76 | |
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02-23-2018, 11:05 PM | #77 |
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02-23-2018, 11:14 PM | #78 | |
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High flow cat though, right? Dyno? |
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02-23-2018, 11:17 PM | #79 |
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Like what would be seen during datalogging?...can you data log residual exhaust gases in the combustion chamber, or exhaust escape velocity out the headers? Really, I dunno, can you?
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02-23-2018, 11:41 PM | #80 |
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02-24-2018, 01:02 AM | #81 |
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Say bye to that dip! Good riddance!
Also, how did you get the car to rev to 8k? |
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02-24-2018, 01:04 AM | #82 |
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You can set the rev-limiter in the tune. Mine is at 7800rpm.
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02-24-2018, 01:12 AM | #83 | ||
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Quote:
http://www.ft86club.com/forums/showp...8&postcount=51 Last edited by nikitopo; 02-24-2018 at 01:46 AM. |
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02-24-2018, 01:23 AM | #84 | |
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I don't know how much more simple to put it then that. Not trying to flame you, or say that your wrong. But if there is not an aftermarket tuner that has removed the dip on a stock car I would say this is not true. There are plenty of examples of tuned stock cars. Still have the dip. Man I am really sorry to the OP. I always thought the ACE header was kind of over blown but after seeing all the charts, without even bothering to look at the numbers, it obviously works well. |
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