outdoor temperature?

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elgarvo616
Posts: 883
Joined: Tue Apr 13, 2004 12:56 pm
Car: 1995 240sx aka sweet thang

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i had my boost controller set at 12psi(manual BC), but i set it back when it was like 40*-50* out. Today it was like 85* and i was spiking all the way up to 16psi. I am running the stock T25 (s13 blacktop).

my question is, does the air temperature outside cause that drastic of a change? i mean if it got colder i would understand i would understand it. So is it the warmer air or is my MBC sh*tty?


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IanS
Posts: 9758
Joined: Thu Dec 23, 2004 3:07 pm
Car: 2002 Subaru WRX, 2010 Subaru Forester XT, 2004 Infiniti G35 Coupe.
Location: Esko, MN
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when I was running MBC it would spike more when it was cold

elgarvo616
Posts: 883
Joined: Tue Apr 13, 2004 12:56 pm
Car: 1995 240sx aka sweet thang

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the colder, denser air would make sense. but i dont understand why hot air would make the boost go up that high.

elgarvo616
Posts: 883
Joined: Tue Apr 13, 2004 12:56 pm
Car: 1995 240sx aka sweet thang

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does anyone know?

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IanS
Posts: 9758
Joined: Thu Dec 23, 2004 3:07 pm
Car: 2002 Subaru WRX, 2010 Subaru Forester XT, 2004 Infiniti G35 Coupe.
Location: Esko, MN
Contact:

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check for vacuum leaks, make sure the locknut on the MBC is tight, I had mine back out and one day I was drving and all of a sudden I was boosting 17 psi, I was like wtf


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