Differeces between GM 3Port and OEM Sol for Pump Gas?
#18
OK, Thanks for all the replies. I already ordered the GM solenoid with the pigtail from Rock Auto. Does anyone know what size are the barbs of the GM solenoid? Is it a 3/16 barb? I am planning on buying silicone vacuum tube of 5/32 (4 mm) inside diameter. Will this work?
#19
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OK, Thanks for all the replies. I already ordered the GM solenoid with the pigtail from Rock Auto. Does anyone know what size are the barbs of the GM solenoid? Is it a 3/16 barb? I am planning on buying silicone vacuum tube of 5/32 (4 mm) inside diameter. Will this work?
#22
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Go check out NorCalEvo.Net, and there are a lot of 3-port vs. MBC examples. Bryan is good with getting the data out there.
#23
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i use 92 octane pump gas. I peak at 24-25 and hold about 21 til 7000RPM otherwise it sometimes knocks. I rather have more timing up top than boost.
I should make a video. maybe this coming few weeks
I should make a video. maybe this coming few weeks
#24
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I just upgraded to and tuned the Perrin 3-port on my car last night. The 3-port setup is definitely superior to the stock setup. Response is much faster and spikes are basically eliminated with a well defined TBEC table. I'm now running a faster WGDC request delay (or whatever) as well.
the only thing is that the 3-port setup vents so much more you don't get the resolution that you have with the stock solenoid. I was at ~45% WGDC with the stock solenoid and I'm at around 68% with the 3-port at the same boost level (~24 psi). The resolution isn't really needed with the increased response time, but it also means that you don't have as much room for high boost.
Given, at higher RPM I'm actually running LESS WGDC than the stock solenoid ... I taper up to about 85% rather than 100% for 21psi at redline. I'm working in a 20% window rather than a 60% window.
the only thing is that the 3-port setup vents so much more you don't get the resolution that you have with the stock solenoid. I was at ~45% WGDC with the stock solenoid and I'm at around 68% with the 3-port at the same boost level (~24 psi). The resolution isn't really needed with the increased response time, but it also means that you don't have as much room for high boost.
Given, at higher RPM I'm actually running LESS WGDC than the stock solenoid ... I taper up to about 85% rather than 100% for 21psi at redline. I'm working in a 20% window rather than a 60% window.
#25
Evolved Member
If you're running a stock-ish turbo, you can expect to hold more boost to redline, plus the 3-port reacts more quickly than an MBC. There are also gains in the midrange. You'll have 16 different points to custom adjust your boost curve.
Go check out NorCalEvo.Net, and there are a lot of 3-port vs. MBC examples. Bryan is good with getting the data out there.
Go check out NorCalEvo.Net, and there are a lot of 3-port vs. MBC examples. Bryan is good with getting the data out there.
#26
I finally finish installing the GM 3 Port. I am glad I did, it works great and it is very easy to tune. I have never mess with EcuFlash before and on my third flash I am flat at 20 PSI till redline with basically no or minimum overshoot. You just need to think about how the boost control system works, do some plotting and prework in excell and you are all set. The setup works great and is is a stealth mod since there are no MBC anywere.
Next step is to make some chages so I can run 22 PSI which is my target. I have never tried the boost pill (which I also purchase already, but not installed), but the 3 port so far works great and it even install in the stock BCS location with the included holder tab.
Next step is to make some chages so I can run 22 PSI which is my target. I have never tried the boost pill (which I also purchase already, but not installed), but the 3 port so far works great and it even install in the stock BCS location with the included holder tab.
#27
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I finally finish installing the GM 3 Port. I am glad I did, it works great and it is very easy to tune. I have never mess with EcuFlash before and on my third flash I am flat at 20 PSI till redline with basically no or minimum overshoot. You just need to think about how the boost control system works, do some plotting and prework in excell and you are all set. The setup works great and is is a stealth mod since there are no MBC anywere.
Next step is to make some chages so I can run 22 PSI which is my target. I have never tried the boost pill (which I also purchase already, but not installed), but the 3 port so far works great and it even install in the stock BCS location with the included holder tab.
Next step is to make some chages so I can run 22 PSI which is my target. I have never tried the boost pill (which I also purchase already, but not installed), but the 3 port so far works great and it even install in the stock BCS location with the included holder tab.