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Discussion Starter #1
Anyone know the diamiter of the vacuum hose on an RB25DET? The hose that goes to the boost solinoid?
Cheers
Adam :D
 

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Discussion Starter #2
I seem to think its 5mm. Can anyone confirm this?
 

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The hose on my car is 5mm , If your thinking of replacing it remember theres a restrictor in one of the pipes, If you don`t put it back in you will lose stage two boost.
 

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Discussion Starter #4
My car only boosts at .5 bar as it is as the hoses for to boost solinoid had been removed. I need to buy some hose to reconnect it all up. Does anyone know which pipe has the restrictor in it? Cheers
 

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vacuum pipe

Its the section with my idea of a circle round it. It should have a green band around it aswell, at lease my one does.
 

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Discussion Starter #7
dammit. I need one of them then :D
 

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If the restrictor is removed you will only get stage 1 boost at about 0.5 bar all the way to the rev limiter instead of stage 2 (full boost) at around 4800-5000 rpm up to the limiter.
 
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