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I converted my stockish set up to Tephra V7 & everything has been going well so far off-boost driveability wise (big thanks to Tephra, mrfred, recompile, acamus, phenem & everyone else involved!) but cant seem to get past wastegate pressure much. I read a majority of the documentation online & seem to have a decent grasp on the idea of boost tuning but I'm lacking in the execution part.
I have all my correction zero'd out & I'm trying to get my boost curve close using only the "Main Map Wastegate Duty". I'm aiming for 20-22 psi peak down to 18ish at redline on CA 91 using load based boost control. After I get close to my desired curve, I was going to use the load data in my logs to make the boost adder & BDEL add to whats shown.
MODS:
3" catless TBE
Intake
Buschur Race FMIC
STM upper & lower intercooler pipe kit
Tial QR50
OMNI 4 Bar map
Grimmspeed BCS
spoolinup COP
First log has Main Map Wastegate Duty set to 60 pretty much across the board yielding these results:
Second log has 75 almost across the board using the data in the first screenshot with the same boost results:
The Grimmspeed is hooked up per the instructions with port 1 going to my intake, port 2 going to my wastegate & port 3 going to the nipple on my compressor side of the turbo.
On my stock rom, I had to lower the WGDC to 50 from the stock value of 100 to achieve the 20ish PSI with the grimmspeed but now it seems like the WGDC isnt reacting like I've been reading online. Reverting to my stock rom gives the desired boost curve so i know the bcs is working.
If anyone could point me in the right direction I'd appreciate it!
Apparently I went a little overboard with the TPS WGDC Correction & had it set to zero. That would explain only having wastegate pressure, I set them all back to 100 & everything works as intended.
Would you happen to know why in V7 I cannot see Boost adder and the other PSI based tables? I have dug and found a few others on the forum with the same experience, but no one has been answered. Anything helps thanks!
Mar 14, 2019, 12:29 PM
