Going to try to explain the issue I'm having after flashing APR Stage 2 tune on my MK7R 6MT after my tuner said they could no longer support me:
-1st-3rd gear shifts and launches work great, car pulls hard, I'm happy.
-Upon entering 4th gear after a redline shift out of third gear, the turbo seems to lag for about 0.5 seconds after my foot is done releasing the clutch pedal and the 'hard pull' up to that point in time becomes a 'whoa, what huh? when are we going to start accelerating again?'. After that lag, it sounds (I don't have a boost gauge yet) like it builds boost again and begins accelerating and RPMs rise once again.
Here's what you'd see on the tachometer if I had footage of this phenomenon:
-For example, Entering 4th gear goes like:
*Pulls hard 1st-3rd, entering 4th*
RPMs are at 4,000ish, my foot is now fully off the clutch pedal, right foot mashed. RPMs stay at 4,000 / might only get up to 4,200 RPM for what seems like an eternity after a hard pull 1st-3rd, but what is more like 0.5 seconds. Then after what I think sounds like the turbo building boost back up (again, no boost gauge to verify), the car begins to accelerate and the RPM needle begins to rise somewhat quickly again, but obviously way less quickly than it does in the earlier gears.
Here are my specs:
2016 Golf R, 6MT (46k miles)
-APR Stage 2 tune - pops and bangs, aggressive, non APR DP version
-Stage 2 Endurance South Bend Clutch (Properly broken in, about 9,000 miles past break in now)
-APR Carbon Fiber intake
-Billet aluminum rear main seal upgrade
-CTS Turbo 3.5" high flow cat downpipe (the reason my tuner said that APR will not support me with this problem, oof should've just gone APR....)
-OEM intercooler
-OEM clutch delay valve still there, unmodded
-OEM catback
Can someone give me some ideas as to why I'd experience this 4th gear lag? It made me lose the jump off a 4th gear pull race against an LSX camaro recently and I know I would've won in a 3rd gear race (;
-1st-3rd gear shifts and launches work great, car pulls hard, I'm happy.
-Upon entering 4th gear after a redline shift out of third gear, the turbo seems to lag for about 0.5 seconds after my foot is done releasing the clutch pedal and the 'hard pull' up to that point in time becomes a 'whoa, what huh? when are we going to start accelerating again?'. After that lag, it sounds (I don't have a boost gauge yet) like it builds boost again and begins accelerating and RPMs rise once again.
Here's what you'd see on the tachometer if I had footage of this phenomenon:
-For example, Entering 4th gear goes like:
*Pulls hard 1st-3rd, entering 4th*
RPMs are at 4,000ish, my foot is now fully off the clutch pedal, right foot mashed. RPMs stay at 4,000 / might only get up to 4,200 RPM for what seems like an eternity after a hard pull 1st-3rd, but what is more like 0.5 seconds. Then after what I think sounds like the turbo building boost back up (again, no boost gauge to verify), the car begins to accelerate and the RPM needle begins to rise somewhat quickly again, but obviously way less quickly than it does in the earlier gears.
Here are my specs:
2016 Golf R, 6MT (46k miles)
-APR Stage 2 tune - pops and bangs, aggressive, non APR DP version
-Stage 2 Endurance South Bend Clutch (Properly broken in, about 9,000 miles past break in now)
-APR Carbon Fiber intake
-Billet aluminum rear main seal upgrade
-CTS Turbo 3.5" high flow cat downpipe (the reason my tuner said that APR will not support me with this problem, oof should've just gone APR....)
-OEM intercooler
-OEM clutch delay valve still there, unmodded
-OEM catback
Can someone give me some ideas as to why I'd experience this 4th gear lag? It made me lose the jump off a 4th gear pull race against an LSX camaro recently and I know I would've won in a 3rd gear race (;
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