No Boost Control! Troubleshooting & Bench Testing my Tial MVR Wastegate

Last track day the car kept spiking to 30psi with my wastegate. Unsure why we tried another wastegate and were able to regulate boost pressure. Time to finally tear my gate apart to figure out why it wasn't working.
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[@evanwynn5542]

Looks like it wasn't able to fully open with 2 springs

[@EKBoosted]

It did, I just didn’t throw enough air at it in the clip.

[@PRZJ91]

How hot was it? The iat’s could possibly have pulled an ungodly amount of timing that it ignited the fuel late in the exhaust and that could spool the turbo over the pressure you want. Also more load on the track will do that. But if it was source to gate and it still did it then that’s weird. Where do you source your boost pressure from?

[@PRZJ91]

Also I’d def switch to pushlock fittings. I’m not a fan of those banjo fittings lol

[@EKBoosted]

Boost pressure is sourced from the turbo. The car wasn’t that hot, 160-190 during the passes. The fact it worked with a different gate is the confusing part. They are the same wastegate outside of the color. Maybe blue is just bad luck 😂

[@PRZJ91]

@@EKBoosted lmfao maybe, but nah Im talking about intake air temperature. Not coolant temp. If your car sat enough to cool to 160, the iats are usually cooler than that when cruising but sitting and heat soaking they could have been close to that coolant temperature. They could have even been the same. That would pull excessive timing and cause overboost issues. But the gate to source issue is weird. What’s the boost cut?

[@EKBoosted]

@@PRZJ91 boost cut was set at 30psi. The intake air temps shouldn’t have been to bad, as it was in the 60s that day. Also, if it was the intake air temp I would imagine I would’ve had the same issue with a different gate.

[@PRZJ91]

@@EKBoosted possibly. Check the iat’s on the log if you took one. And then check your iat compensation.