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4-port Boost Control Solenoid

Old 01-05-16, 09:39 PM
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Originally Posted by C. Ludwig View Post
The 4-port solenoids seem to have a narrower range of duty cycle where they are effective. A MAC 3-port works well in the 20-80% range. A MAC 4-port more like 30-80%. The ultimate in control, IMO, is using two 3-port solenoids, one for each side of the gate, and using an ECU that is capable of independent control of each in closed loop. Not many ECUs are doing that though.
There is a nice table at the bottom of this page with duty cycle ranges for the MAC valves:
- Boost solenoids

they sell a high frequency valve which is a semi-custom valve you can buy through MAC that is 12W instead of 5.4W (from what I've read on the internet). It helps broaden the duty cycle range back up a bit.

Boost Solenoid BCS 4 Port Mac 46A High Frequency for Turbosmart aem Hi Temp | eBay

I have one I'll be installing on my car over the winter.

Last edited by eage8; 01-05-16 at 09:43 PM.
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Old 01-05-16, 10:33 PM
  #52  
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Originally Posted by eage8 View Post

Boost Solenoid BCS 4 Port Mac 46A High Frequency for Turbosmart aem Hi Temp | eBay

I have one I'll be installing on my car over the winter.
The link You posted says $710. Please tell me that is a typo.
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Old 01-05-16, 10:42 PM
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Originally Posted by Monkman33 View Post
The link You posted says $710. Please tell me that is a typo.
HA! so it does... I bought mine for $60 a few months ago no idea why the price is messed up. You could probably message them and ask. A few of their other prices in their store are crazy too.
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Old 01-06-16, 11:37 AM
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Originally Posted by eage8 View Post
HA! so it does... I bought mine for $60 a few months ago no idea why the price is messed up. You could probably message them and ask. A few of their other prices in their store are crazy too.
I searched by part number and found it for $43 shipped. Hopefully it is the same one.
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Old 01-06-16, 02:50 PM
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You can buy it at lms-efi.com
Just click on the 3 port solenoid and there is a drop down menu to select the 4port .
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Old 01-06-16, 04:55 PM
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Originally Posted by Monkman33 View Post
I searched by part number and found it for $43 shipped. Hopefully it is the same one.
I don't think it has a part number, (I don't see one, and it doesn't actually have a MAC part number) so you probably ordered the 5.4W version

Originally Posted by silverTRD View Post
You can buy it at lms-efi.com
Just click on the 3 port solenoid and there is a drop down menu to select the 4port .
That's the 5.4W version which has the slightly smaller duty cycle range. still fine, but not the same valve I'm talking about.
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