boost relief
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More Turbo
Joined: Sep 2005
Posts: 695
Likes: 2
From: arizona
boost relief
ok, i was wanting to keep
my truck from going over 30 psi boost. and thought that i would put a boost relief valve on the intake pipe. but i have not heard of anyone doing this on a diesel , so my question is do you see any problems with it ? the only thing i can think of is that when it lifts off will the turbo over spool trying to make more boost not knowing that it should not ?i have seen a lot of gas engines
that have done
this,, but they have a reg turbo with a waste gate, and not a VGT turbo.
thanks
chad
my truck from going over 30 psi boost. and thought that i would put a boost relief valve on the intake pipe. but i have not heard of anyone doing this on a diesel , so my question is do you see any problems with it ? the only thing i can think of is that when it lifts off will the turbo over spool trying to make more boost not knowing that it should not ?i have seen a lot of gas engines
that have done
this,, but they have a reg turbo with a waste gate, and not a VGT turbo.
thanks
chad
Senior User
Joined: Mar 2005
Posts: 111
Likes: 0
From: columbus MS
As long as your vanes don't stick, max boost can be controlled easily with a good code. The only times I have seen my truck over boost is when the vanes were sticking, and sometimes it will spike a little if I let of quickly. The latter is not really dangerous for the engine (as long as you don't blow the intercooler apart), because there is not a large amount of fuel being combusted, so the pressures won’t get high enough to hurt anything inside of the cylinder.
I guess if you were worried about having an over boost situation, it would be a last catch safety. I would only use it for this, and not as a regulator for max boost (only as a last catch for something going wrong).
I guess if you were worried about having an over boost situation, it would be a last catch safety. I would only use it for this, and not as a regulator for max boost (only as a last catch for something going wrong).
Thread Starter
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More Turbo
Joined: Sep 2005
Posts: 695
Likes: 2
From: arizona
protection
i have stock tune on truck right now and it boost up to 24 lbs right away and if you hold it down long enough it will creep up over 30 psi and if you let off it jumps to 35+ (i am guessing that is the throttle plate closing,) whitch would put a lot of pressure on the intercooler and a relief valve would pop off at this time or if i boost over 30. i just did not want the turbo to over spool on this ??
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