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Old Sep 30, 2020 | 09:26 PM
  #21  
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I run the Viair 1000 kit and a single 3-port solenoid. I can target 40+psi with a 3psi wastegate spring.
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Old Oct 1, 2020 | 05:49 AM
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Originally Posted by SLOW SEDAN
Well you said simplest earlier, that certainly complicates things a bit and eats two outputs.
yea I know, I’m trying to weigh out all of my options now. This project has gone from an NA little ripper to a “race car” at least in my eyes

Originally Posted by Forcefed86
a 3 port (if setup correctly) with manifold pressure will give you all the resolution most setups need. I can run 8-20+ easily. I don't know that software well enough to recommend a strategy. But I don't understand why you'd need a separate pressure sensor fore the WG unless you were using C02 or something to control boost? Should be able to program WG DC VS manifold press. OR WG duty VS wheel speed would be my preference.
Im a newb when it comes to turbo cars now. Back when I was messing with turbo nissans, we used an eBay manual boost controller and an SAFC-II to trick the MAF for fueling circa 2006. So much has changed I’m trying to get a grasp on it

Originally Posted by jayyyw
I run the Viair 1000 kit and a single 3-port solenoid. I can target 40+psi with a 3psi wastegate spring.
this is what I want in the end after doing a little research. Why did you go single MAC valve vs 2? Reason I ask is the way motion race works sells their kit is with 2 MAC valves. It appears one feeds the compressed air to the WG’s and one vents the air as a control
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Old Oct 1, 2020 | 08:12 AM
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Originally Posted by jayyyw
I run the Viair 1000 kit and a single 3-port solenoid. I can target 40+psi with a 3psi wastegate spring.
While it works I can't see ever only needing 3lbs of boost, if anything goes wrong on that system you are stuck with a turd of a car. Unless you have it setup properly to pin the gate shut until max boost, might be why your spool is so slow as well.
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Old Oct 1, 2020 | 08:17 AM
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Originally Posted by Forcefed86
a 3 port (if setup correctly) with manifold pressure will give you all the resolution most setups need. I can run 8-20+ easily. I don't know that software well enough to recommend a strategy. But I don't understand why you'd need a separate pressure sensor fore the WG unless you were using C02 or something to control boost? Should be able to program WG DC VS manifold press. OR WG duty VS wheel speed would be my preference.
Same, I can run 8-30psi on a 7.5lb spring and single solenoid, and its a cheap $40 Chinese wastegate. I'd hope all these fancy gates people use work at least that well. I prefer simple setups, especially for street cars. Even on race cars I've seen people chasing problems with C02 leaks, empty bottle, forget to open bottle, etc that simply don't exist on a basic manifold referenced system.
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Old Oct 1, 2020 | 08:55 PM
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Originally Posted by SE-R Spec
this is what I want in the end after doing a little research. Why did you go single MAC valve vs 2? Reason I ask is the way motion race works sells their kit is with 2 MAC valves. It appears one feeds the compressed air to the WG’s and one vents the air as a control
1 solenoid works. I haven't experienced the need to have 2 solenoids.
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Old Oct 1, 2020 | 08:57 PM
  #26  
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Originally Posted by SLOW SEDAN
While it works I can't see ever only needing 3lbs of boost, if anything goes wrong on that system you are stuck with a turd of a car. Unless you have it setup properly to pin the gate shut until max boost, might be why your spool is so slow as well.
I run 13psi springs now. have it setup to pin the gates until 5000rpm, then I start my ramp.
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Old Oct 2, 2020 | 07:38 AM
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2 is for more resolution/control. Its not needed IMO unless you are competitively racing. Same with a 4 port VS a 3 port. Though if plumbed correctly a simple 3 port will give the same min/max settings as a 4 port, or 2 separate valves. The area in-between the min/max just has more control.
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Old Oct 6, 2020 | 09:50 AM
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Originally Posted by Forcefed86
2 is for more resolution/control. Its not needed IMO unless you are competitively racing. Same with a 4 port VS a 3 port. Though if plumbed correctly a simple 3 port will give the same min/max settings as a 4 port, or 2 separate valves. The area in-between the min/max just has more control.
Even then some classes don't allow boost controllers so you have to get tricky!
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