Anyone have any tricks to get rid of the boost spike that you get after a shift or stab on the stock turbo?

It's annoying to tune fuel/boost curves because of the spike after a shift.

 

I'm seeing a 3-4 psi boost spike on 4th-5th upshifts and 5th-6th upshifts. The only work around that automatically keeps things safe is to reduce boost on my "high gear" tables which only effect 5th and 6th gears but that takes a good 20-30 whp away from my 375 whp NARRA tune which I sorely need to stay competitive. The other work around is to lift on upshifts into those high load gears but that is really distracting when concentrating on maxing out cornering speeds.

I'm going to try and turn on error correction to only allow downward correction and make sure my target loads are lower than actual between gear shifts.

I'm also going to raise my "lower bound ignition timing" tables so there is less timing drop during upshifts given that load usually spikes slightly and report back on results.

 

@hiboost if you run non-zero upward wgdc correction and your wg correction interval is sufficiently short (say 2-4ms), you might try applying RAX patch #2, upshift boost patch.

 

Yeah I was looking at that, could be my turbo combo and cams/mivec is just so spool happy that I'll have to throw everything I got at it. I tested with higher timing values in the lower bound ignition timing tables and it helps a bit but still not great. A side effect is now the engine note doesn't make that pop noise and and the clutchpacks feel like they slip more when engaging... so a step backwards. I like that crisper sequential shifting effect between gears like I had before which was likely due to a timing drop between gears. Probably at part throttle i notice it more, sounds lame now.