4.5.3 Issues Boost command 6500 rpm and up, No boost after flash and idle cam table causing surging.

[jpierro79]

Please see 8:41 in the time on the log for the first issue below

First issue is FK8 FL5 and DE5 cutting boost to lower value at 6500 rpm to redline log included shows this happening. I have noticed that sometimes different cam timing will alleviate the boost issue but makes the tune sub optimal. I have tried changing every torque value. This happens every time and the fuel systems has plenty left. Stock cars and cars with camshafts will do this when intake cam timing is around OEM area at 6500 rpm.

The log included shows the issue at 8:41 and doesn't happen in 3rd gear. I can only guess at this point it's some sort of torque calculation issue or limit. If I move the intake cam timing to a significantly lower value, it will make more boost but is not optimal. Aircharge was set to 240 all the way to redline and suddenly drops to 222 at 6500. All tables were checked and I rebuilt multiple files.

The second issue is I've had multiple complaints of 4.5.3 on Fk8 somehow effecting boost response and extremely low boost and very laggy feeling. I don't have log from those cars yet. There is no check engine light either.

The last issue I would like to bring up is the idle cam tables being changed causes surging and bounces oscillates the factory settings after flash (30 and -25) and whichever value you set it to.

Thank you sincerely
John Pierro from FK8TD.com

[Spunkster]

Post the calibration that the datalog was made with.

[jpierro79]

With all due respect this is a pro calibration I am not posting this calibration. I own fk8td and we can talk on the phone if you want. Here is the other car where the vct is totally unresponsive and has zero codes. 4.5.3 has made his car just about undrivable. Here is the log. Nothing changed but 4.5.3
.

When I listed for over a year about one specific ecu on the 2021 that they would not go to boost command you told me there was nothing wrong. When you released missing boost command tables that ecu worked after that. There are many glitches lately. These can be checked in house. People are not happy. Over 3 years I was the first to make 700 on hondata. These problems didn't exist then. I dont know what to say here because im not going to post my years of work of what works best on these cars so the people can just take it.

[Hondata]

Then email it to support@hondata.com

[FK8_Hoonigan]

FYI
The extreme lag is a result of a bug on v4.5.3 where after a flash VTCs are "stuck" in full advance or retard state. Already got the logs from customers and caught that bug.
Flashing same calibration with v4.5 5 released today seems to resolve it.

[Hondata]

Thanks for the update. We'll investigate this further.

No changes to the FK8 were made between 4.5.3 and 4.5.5 so that part is puzzling. However between 4.5.3 and 4.5.3 VTC idle tables were added.

[Hondata]

Same issue

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