Whoops, sorry for disappearing for a while! I think I had email notifications turned off...Thanks for all the kind words!
I'm also in Springs - I have a good buddy with a white iX (and a couple of other e30s - one to restore, one for parts). Maybe we should meet up sometime?
tschultz,
I am running two 3-port MAC solenoids: https://www.amazon.com/gp/product/B00YBN3DRO/
I haven't gone to closed-loop control yet, but hardly drove the car all winter... now that the weather is getting nice again, I'll be driving more. I need to fix a leaking thermostat gasket before I do much more driving, though. If you're not planning to adjust your boost often, a simpler setup than PID would be to just use the solenoid like a switch. Run it in line with the bottom WG port, close it/vent it (prevent turbo pressure from opening the WG) until you hit 6psi. Of course there's no failsafe there, so make sure if you try that, you have overboost protection enabled! Although probably not too much worry at 6psi. If that's not aggressive enough, you might be able to plumb up a 4-port solenoid to switch between pressurizing the top of the WG below 6psi and then switching to venting the top and pressurizing the bottom above 6psi (for reasons I can't fully remember, two 3-port solenoids seemed to give me the best control, probably since they can be controlled fully independently).
AWD_E30, I finally replied to your PM - didn't see that you were also planning for HE351VE. Might be a tight fit in an iX!
Originally posted by downforce22
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tschultz,
I am running two 3-port MAC solenoids: https://www.amazon.com/gp/product/B00YBN3DRO/
I haven't gone to closed-loop control yet, but hardly drove the car all winter... now that the weather is getting nice again, I'll be driving more. I need to fix a leaking thermostat gasket before I do much more driving, though. If you're not planning to adjust your boost often, a simpler setup than PID would be to just use the solenoid like a switch. Run it in line with the bottom WG port, close it/vent it (prevent turbo pressure from opening the WG) until you hit 6psi. Of course there's no failsafe there, so make sure if you try that, you have overboost protection enabled! Although probably not too much worry at 6psi. If that's not aggressive enough, you might be able to plumb up a 4-port solenoid to switch between pressurizing the top of the WG below 6psi and then switching to venting the top and pressurizing the bottom above 6psi (for reasons I can't fully remember, two 3-port solenoids seemed to give me the best control, probably since they can be controlled fully independently).
AWD_E30, I finally replied to your PM - didn't see that you were also planning for HE351VE. Might be a tight fit in an iX!
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