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Discussion Starter #1
does anybody know what limits the boost when our cars are cold or it is cold outside when it is below 40 degrees out my car will only boost to 7 to 8 lbs
i have a [email protected] filter ko dp and boost controller tvis is removed factory boost sensor is unhooked as well what is left to limit boost????
 

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Discussion Starter #3 (Edited)
can i disconnect this??? i always let my car warm up before i drive it or can to cold of air harm my car when boosting 15+ lbs?? thanks for the help.
because there is nothing worse than some mustang messing with me when it is a little to cold out and geting stomped.
 

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flatblack887 said:
can i disconnect this??? i always let my car warm up before i drive it or can to cold of air harm my car when boosting 15+ lbs?? thanks for the help.
because there is nothing worse than some mustang messing with me when it is a little to cold out and geting stomped.
You can do whatever you want.

But...warming up that car raises the engine coolant temp, not the ambient air temp. When its 30 F outside, its 30F, no matter how much you warm up the engine.

bill
 

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flatblack887 said:
but is the vsv what is not letting the car boost when it is cold out
Actually, it is only letting it boost ~ 8 psi. That's exactly what Toyota wants it to do.

High boost and low ambient temps significantly increase the risk of detonation. Like I said, you can disable it if you choose, but its there for a reason.

And If you disable it, you will have to re-set your boost controller. Actually, the T/VSV is really a bleed-off boost controller, and increases boost when it is energized. If you disable it, you will only have one boost mode-low boost.

bill
 

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nivek said:
I though warmer air temps increase risk of detonation.
Colder air is more dense, so it increases charge mass, just the same as more boost.

It isn't "warmer air temps" that increases the risk of detonation, its higher cylinder temps. Larger mass means more pressure, more pressure means higher cylinder temp.

bill
 
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