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-   -   Boost Leak? Logs included (https://www.n54tech.com/forums/showthread.php?t=65376)

spike98 05-15-2021 01:25 PM

Boost Leak? Logs included
 
2 Attachment(s)
2020 C43 with Petro 94. Installed the JB4 with BCM module. Ran 0-60 and 1/4mi times with the onboard computer both stock and running map 1 and 2. No decrease in time and butt dyno confirms. Car is runs 0-60 in over 5 seconds.

The turbo noise (woosh noise) increases with maps but it seems like its falling flat. The logs seem to show boost tapering off to almost stock by the upper RPM. Thoughts?

Log of map 1 and 2 attached.

Steve @ BMS/Fuel-It! 05-17-2021 11:52 AM

Looks clean to me and boost is hitting the additive target.

Can you upload a log with all 3 maps for comparison?

https://imagizer.imageshack.com/v2/8...923/3UVKOG.jpg

spike98 05-17-2021 12:09 PM

Quote:

Originally Posted by Steve @ BMS/Fuel-It! (Post )
Looks clean to me and boost is hitting the additive target.

Can you upload a log with all 3 maps for comparison?

https://imagizer.imageshack.com/v2/8...923/3UVKOG.jpg

Will do.

I can say for certain that i did have a boost leak. Lost connection where the IC meets the intake manifold. Upgraded the clamps to T-bolt style and it pulls like a freight train.

Im interested in feedback still on the new logs that i will upload shortly.

spike98 05-26-2021 10:21 AM

1 Attachment(s)
Quote:

Originally Posted by Steve @ BMS/Fuel-It! (Post )
Looks clean to me and boost is hitting the additive target.

Can you upload a log with all 3 maps for comparison?

https://imagizer.imageshack.com/v2/8...923/3UVKOG.jpg

Here you go! 4 Maps 0 through 3.

Steve @ BMS/Fuel-It! 05-26-2021 10:47 AM

On map 0 your stock boost falls off to about 10psi. On subsequent maps that the ECU psi is dropping so it's offsetting some of your additive but still see pretty good gains. Timing still looks good, how does a log on map 4 look?

spike98 05-26-2021 12:43 PM

1 Attachment(s)
Quote:

Originally Posted by Steve @ BMS/Fuel-It! (Post )
On map 0 your stock boost falls off to about 10psi. On subsequent maps that the ECU psi is dropping so it's offsetting some of your additive but still see pretty good gains. Timing still looks good, how does a log on map 4 look?

Map 4 attached

Are the turbos running out of steam at the higher RPM range? What about the throttle not reaching 100% until 4500rpm?

Steve @ BMS/Fuel-It! 05-27-2021 09:57 AM

So far you're holding the requested boost. Throttle closure is pretty minor...I wouldn't worry about it in that particular log.


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