Boost Guage alway's negative??
02 February 2007, 07:45 PM
#1
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Boost Guage alway's negative??
Can anyone help out....
My boost gauge which was fitted today look like this....
It always is on the low side of zero....
On full boost I get it to Zero (0)...
But I cannot get it to start at zero to shot +ve boost...
I've checked all the connections a few time and all is correct....
No problem with car, pulls good as always!!
Is the guage the problem??
Can anyone help out....
Thanks
Scott
My boost gauge which was fitted today look like this....
It always is on the low side of zero....
On full boost I get it to Zero (0)...
But I cannot get it to start at zero to shot +ve boost...
I've checked all the connections a few time and all is correct....
No problem with car, pulls good as always!!
Is the guage the problem??
Can anyone help out....
Thanks
Scott
Last edited by Spoiler; 02 February 2007 at 07:57 PM.
02 February 2007, 08:00 PM
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on tick over it should show something like -0.7, pressing the accelerator should make it go up to zero and above but not much. try it on the road and if at WOT you dont get positive boost then its probably plumbed in to the wrong pipe... or your leaking boost from someware quite majorly! where have you taken the boost feed from?
02 February 2007, 08:00 PM
#4
It sounds like it is either plumbed into the wrong place or your car is not boosting properly.
It should read negative pressure when you are off the accelerator or just keeping a constant speed at low revs and obviously a higher pressure when you are accelerating or above 3-4k revs.
The gauge should be plumbed into the inlet manifold.
It should read negative pressure when you are off the accelerator or just keeping a constant speed at low revs and obviously a higher pressure when you are accelerating or above 3-4k revs.
The gauge should be plumbed into the inlet manifold.
02 February 2007, 08:04 PM
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if driving car off throttle the boost gauge should read -0.5-6 then on throttle should sit at zero till the turbo comes in, then if running a standard car should boost to about 0.9bar
02 February 2007, 08:04 PM
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It sounds like it is either plumbed into the wrong place or your car is not boosting properly.
It should read negative pressure when you are off the accelerator or just keeping a constant speed at low revs and obviously a higher pressure when you are accelerating or above 3-4k revs.
The gauge should be plumbed into the inlet manifold.
It should read negative pressure when you are off the accelerator or just keeping a constant speed at low revs and obviously a higher pressure when you are accelerating or above 3-4k revs.
The gauge should be plumbed into the inlet manifold.
Look all good, nothing wrong with the car..... Pulls great as always
Wrong place??
02 February 2007, 09:13 PM
#7
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When my engines not running my needle sits at zero when started goes minus when floored goes positive looks to me it may be your gauge
or is it mine
KIP
or is it mine
KIP
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02 February 2007, 10:07 PM
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02 February 2007, 10:17 PM
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HAVE A LOOK ON THE GROUP BUY PICS THEIRS LOADS THAT HAVE JUST BROUGHT THESE ON THEIR
Just had a look on ebay and the are all set on 0 to start these may be differnt if the do the open sweep thing
KIP
Just had a look on ebay and the are all set on 0 to start these may be differnt if the do the open sweep thing
KIP
02 February 2007, 10:37 PM
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Cheers SCOOBYBOY
Just looked at the group buy and the same ones as SPOILERS is right as a start position as they do that fancy sweep thing dosent mean it works though
KIP
Just looked at the group buy and the same ones as SPOILERS is right as a start position as they do that fancy sweep thing dosent mean it works though
KIP
03 February 2007, 08:40 AM
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03 February 2007, 08:47 AM
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Plumbing looks fine to me...The pipe connected to the dump valve appears to be teed into and he is picking manifold pressure from there...
03 February 2007, 10:59 AM
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Funny thing is that it moves like it should, only on the wrong side of zero!!
I think it's the gauge..??
03 February 2007, 11:24 AM
#16
Its giving figures like a non-turboed car.
At idle there is a large vacumm (throttle shut) and gauge will show about -0.7 bar.
With more revs and a throttle wide open you should get approaching to atmospheric pressure (zero on gauge) but it'll never go above zero.
If you are sure that your turbo is really boosting then its either a faulty guage or the recirc valve isn't plumbed in to the inlet manifold.
Nick
At idle there is a large vacumm (throttle shut) and gauge will show about -0.7 bar.
With more revs and a throttle wide open you should get approaching to atmospheric pressure (zero on gauge) but it'll never go above zero.
If you are sure that your turbo is really boosting then its either a faulty guage or the recirc valve isn't plumbed in to the inlet manifold.
Nick
03 February 2007, 12:01 PM
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I'd tap into the inlet manifold rather than the DV? You will get manifold pressure then which is more accurate for the pressure the engine is being fed.
03 February 2007, 07:40 PM
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03 February 2007, 08:30 PM
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If it's plumbed into the where the picture shows, then that's fine; the vac hose to the dump valve is subject to manifold pressure. However, I am guessing that is not a picture of your car, and just a picture you used to guide you. Any chance you can post a picture of your actual install?
Paul
Paul
03 February 2007, 08:43 PM
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If it's plumbed into the where the picture shows, then that's fine; the vac hose to the dump valve is subject to manifold pressure. However, I am guessing that is not a picture of your car, and just a picture you used to guide you. Any chance you can post a picture of your actual install?
Paul
Paul
04 February 2007, 11:57 AM
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09 February 2007, 08:13 PM
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