Hi,
I thought I'd do a log for the first time with my very conservative flash tune. I run the JB4 on Map 1 with option 4-3 enabled, all CPS (except 7000 for 6cyl logging) zeroed and open loop fuel disabled so I can have the DME controlling pretty much everything except boost control.
I have Wagner tuning 70mm DPs and an AMS FMIC at this stage. I don't intend on changing the stock exhaust downstream from the DPs because it appears very free flowing. I do intend to do a Mr.5-style additional intake pipe soon. I guess I'm not quite 'FBO'. I run 98 RON fuel which is known good fuel that I've tuned other platforms on. People say it's equivalent to 93 RON+MON/2 in the US.
Timing, boost and AFR are all at very safe levels. IAT is excellent, however I have a handful of timing drops. I was hoping to raise the DME load until just before the threshold of the dreaded AT timing flatline then give it another 2psi or so via Map 6 on the JB4. I see no hope of approaching anywhere near my hoped 16psi when I have timing drops at ~12-13psi.
The secondary cats crossed my mind but SURELY they are not causing this.
See log screenshot and JB4 log attached. Any help is greatly appreciated.
![Click here to enlarge]()
140926_1853.csv
I thought I'd do a log for the first time with my very conservative flash tune. I run the JB4 on Map 1 with option 4-3 enabled, all CPS (except 7000 for 6cyl logging) zeroed and open loop fuel disabled so I can have the DME controlling pretty much everything except boost control.
I have Wagner tuning 70mm DPs and an AMS FMIC at this stage. I don't intend on changing the stock exhaust downstream from the DPs because it appears very free flowing. I do intend to do a Mr.5-style additional intake pipe soon. I guess I'm not quite 'FBO'. I run 98 RON fuel which is known good fuel that I've tuned other platforms on. People say it's equivalent to 93 RON+MON/2 in the US.
Timing, boost and AFR are all at very safe levels. IAT is excellent, however I have a handful of timing drops. I was hoping to raise the DME load until just before the threshold of the dreaded AT timing flatline then give it another 2psi or so via Map 6 on the JB4. I see no hope of approaching anywhere near my hoped 16psi when I have timing drops at ~12-13psi.
The secondary cats crossed my mind but SURELY they are not causing this.
See log screenshot and JB4 log attached. Any help is greatly appreciated.
140926_1853.csv