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The mkiv Supra Owners Club

Boost controller question.


Markie

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Just a question I was wondering about..

 

With my car and the decat's. Would a restrictor ring hold peak boost to around 1.2 BAR whatever the boost controller gets set to?

 

Ie. With restrictor ring in, would the boost controller be able to say set the boost to like 1.5 BAR?

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If you didnt have a boost controller and no ring the boost would go over the recommended 1.2 bar. So you fit the ring to stop this hapening.

 

However you can then fit a controller which stops the pressure escaping thus creating more boost (i think).

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If you have a hose pipe and turn it on half way the water runs as quick as it can, tread on the hose and the flow of water slows down even though the tap is still turned to the same limit. The restrictor is like treading on the hose, it reduces the diamater of the exhaust past which the air flow must pass.

 

If you then turn up the tap to full while still treading on the hose the water will go quicker out the hose pipe as its pushing past the restriction. The boost controller is like the tap, it fools the engine in to pushing more air through which in turn goes past the restrictor and allows more boost. Just turn the tap up or down to get more pressure (boost) in the system.

 

Thats a very simplified version and theres a lot more to boost pressure than that but it gives you an idea.

 

JB

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I see.. So, just say I wanted to run more boost than 1.2. Would it just not be a better solution to remove the ring and then use the controller to limit the boost to say a wanted 1.4 instead of having the ring in there and using thre boost controller to up the boost so it goes to 1.4 past the ring..

 

Just thinking, removing the ring solution would give a better flow of exhaust gases etc?

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Ahh I see... Thought the boost controller could lower boost, just not lower it to below stock boost level.. Did not relise it could not lower boost at all, only raise it..

 

Anyone know then how to up boost on the Blitz controllers? All I got under boost menu is SET and GAIN..

 

Set is 55

Gain is 12

 

Any ideas? Thought it would be nice to me and have a setting saying boost limit, but no :(

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ok try this i have the same as you Blitz dsbc and i have been playing with this for mouths now so i no lots about this dsbc ,I have mine at 15 gain and ratio at 55 with P10 and it is the best i have found for my jap spec tt and it goe's like a bomb if you want to talk to me then P M me and i can talk you few it and xplane more about it and set up .

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