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 Post subject: Re: Closed loop boost
PostPosted: Wed Apr 10, 2019 2:24 pm 
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Joined: Thu Dec 14, 2017 4:40 pm
Posts: 14
Location: France
ECU Model: S100 Pro
Distributor: DTA UK
Firmware Version: 79
What is the recommended maximum pressure for a N75 valve ?
Is it worth the money to swap to Mac valves. In that case 3 or 4 ports.
I have a Forge internal wastegate with 2 ports.

Advice appreciated. Jérémy

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Westfield Megabusa 1300 (Hayabusa powered Seven style kitcat and soon with DTA S100 ecu)


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 Post subject: Re: Closed loop boost
PostPosted: Thu Apr 11, 2019 2:21 am 
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Joined: Fri Feb 28, 2014 1:03 pm
Posts: 1226
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79
There is no maximum pressure, it all depends on the air flow, back pressure, and many other factors.

If you don't have boost creep, you're fine.
If you do have boost creep, this could be a factor.


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 Post subject: Re: Closed loop boost
PostPosted: Sat Apr 20, 2019 3:03 pm 
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Joined: Wed Apr 22, 2015 9:26 am
Posts: 25
ECU Model: S60 Pro
Can someone confirm the pipework connections for the MAC valve fitted to an internal wastegate actuator, is this correct?

Image

Port 1 To atmosphere / filter
Port 2 To wastegate actuator
Port 3 Boost pressure from intake

"Edited now shows correct fitting"

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Last edited by Vitesse on Sun Apr 21, 2019 3:35 am, edited 1 time in total.

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 Post subject: Re: Closed loop boost
PostPosted: Sun Apr 21, 2019 3:03 am 
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Joined: Thu Dec 14, 2017 4:40 pm
Posts: 14
Location: France
ECU Model: S100 Pro
Distributor: DTA UK
Firmware Version: 79
Your MAC valve looks to be a fake to me. Plumbing looks also incorrect as you don’t feed air through the Common port
You will find all details on this page:
https://www.onpointdyno.com/boost-control-plumbing-get-it-right-save-money/

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Westfield Megabusa 1300 (Hayabusa powered Seven style kitcat and soon with DTA S100 ecu)


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 Post subject: Re: Closed loop boost
PostPosted: Sun Apr 21, 2019 3:29 am 
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Joined: Wed Apr 22, 2015 9:26 am
Posts: 25
ECU Model: S60 Pro
Very good article, thank you

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