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Darren Lewis 09-13-2021 06:59 PM

JB4 Log Review
3 Attachment(s)
Good evening, new JB4 user here. Hoping to get a second set of eyes on these logs. I have a pretty conservative map 6 set up. With what I added, my total boost should not have exceeded 16.5 at any RPM range. I have a 2018 RS, currently using Shell V Power, 93 octane.

I added a map 0 log and a log of my map 6, both making the same run, about 2k RPMs in 3rd, to ~6500 RPMs, then a few hundred RPMs in 4th.

On the map 6 log, I feel it looks pretty good, except for the dip in Ign1. From what I have read, it seems a dip around 4k RPMs is normal, but seeing it dip to 3.5 seems low. FWIW it did dip to 4.5 on my map 0 log. Also, the dip in Ign1 did coincide with the uptick in boost, so is it possible this is ok?

Any feedback is greatly appreciated.

Darren Lewis 09-17-2021 08:40 AM

Any BMS folks able to take a look?

Steve @ BMS/Fuel-It! 09-20-2021 09:28 PM

Looks pretty normal but keep an eye on your timing, I see it made a timing correction mid pull. A long pull may result in more corrections or it may have been an anomaly.

Darren Lewis 09-21-2021 12:42 PM

1 Attachment(s)
Hooked up the fuel wires today and ran the same map 6 just to see how the logs looked. AFR was slightly more lean through the meat of third gear (high 11's as opposed to low 11's).

And not sure if FW would really help timing or not, but I did see that same dip around 4300-4400 rpms, but it was not as steep, and still coincided with the uptick in boost.

The Ign1 dip was from 5.5 to 4 today. Before FWs, it dipped from 6 to 3.5

Steve @ BMS/Fuel-It! 09-21-2021 07:34 PM

Looks pretty good, that could be in the flash table which would make sense.

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