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Lost 0.5 Bar somewhere!

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Old 18-05-2008, 08:08 PM
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Dannyf1380
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Default Lost 0.5 Bar somewhere!

I'm relatively new to cossie ownership, When I first got my cossie (stage 3) it would peak at just over 1.5 bar and hold around 1.3ish - Now it barely peaks over 1 Bar.
Is there anything that could cause this to happen?
Old 19-05-2008, 04:11 AM
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tabetha
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The weather, or a duff/weak actuator, wear in the turbo.
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Old 19-05-2008, 05:58 AM
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KSA-Cossie
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As above.
Old 19-05-2008, 08:16 AM
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Dannyf1380
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Could be the actuator...
Admittedly I have tried to turn the boost up by winding the actuator back although this doesnt seem to make a difference whatever way I turn it?
Old 19-05-2008, 02:42 PM
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tabetha
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It won't if it is knackered, could be the seat on the wastegate getting worn and leaking as well, VERY common.
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Old 19-05-2008, 02:55 PM
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JamesH
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Leak in vacuum hoses possible
Old 19-05-2008, 03:04 PM
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frog
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Originally Posted by Dannyf1380
I'm relatively new to cossie ownership, When I first got my cossie (stage 3) it would peak at just over 1.5 bar and hold around 1.3ish - Now it barely peaks over 1 Bar.
Is there anything that could cause this to happen?
Originally Posted by Dannyf1380
Admittedly I have tried to turn the boost up by winding the actuator back although this doesnt seem to make a difference whatever way I turn it?
Be careful tinkering with boost, more than 1.5bar on a std fuel pump, original pump wiring and standard intercooler is probably asking for trouble.

I run an uprated fuel pump, wiring, 4x4 intercooler and T34 on our 2wd cossie. We've left boost at 15psi held or thereabouts to be safe because detonation occurs on a warm day, hot engine if we increase it much beyond that !

Unless you know what you're doing I'd make sure you have this boost issue checked by a pro, or, we could soon be trying to help you out through your first YB engine rebuild
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