Will an exhaust blow cause overboosting?
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Will an exhaust blow cause overboosting?
Morning All,
Just wanted to pick your brains....my car hit nearly 1.7 bar on the way home last night (foot hard down in 3rd), but has been mapped to run at 1.3 bar.
Question is, I know that my exhaust is leaking slightly from around the up-pipe area, will this be causing the boosting issue?
Nothing else has changed since the car ws mapped 2 months ago, and it still pulls as strong as it did before.
Any advice you could give would be great, whilst i'm waiting for my new gaskets to arrive.
Thanks
James
Just wanted to pick your brains....my car hit nearly 1.7 bar on the way home last night (foot hard down in 3rd), but has been mapped to run at 1.3 bar.
Question is, I know that my exhaust is leaking slightly from around the up-pipe area, will this be causing the boosting issue?
Nothing else has changed since the car ws mapped 2 months ago, and it still pulls as strong as it did before.
Any advice you could give would be great, whilst i'm waiting for my new gaskets to arrive.
Thanks
James
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I wouldnt have thought so, though if its letting air in due to a leak it could cause running issues (fooling the Lambda sensor), so I would get it sorted sooner rather than later.
Tony
Tony
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Shame on you for still not fixing that leak!! If you've not had an issue with it over-boosting so far then it's likely to be something else, since hitting 1.7bar has it been doing that everytime you load it up in 3-4-5?
Graham
Graham
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Would you not loose a slight bit of boost pressure with an Up pipe leak?
Surely if the combusted gases are not making all its way through the headers and up to the turbo, then the "leak" would slow down the rate the turbo would be expected to sprin, thus less boost. What about a actuator or wastegate issue?
Rob
Surely if the combusted gases are not making all its way through the headers and up to the turbo, then the "leak" would slow down the rate the turbo would be expected to sprin, thus less boost. What about a actuator or wastegate issue?
Rob
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Yes when i load it it will always go past the 1.3 that we mapped it to? Nothing else has changed though mate. Any ideas?
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Would you not loose a slight bit of boost pressure with an Up pipe leak?
Surely if the combusted gases are not making all its way through the headers and up to the turbo, then the "leak" would slow down the rate the turbo would be expected to sprin, thus less boost. What about a actuator or wastegate issue?
Rob
Surely if the combusted gases are not making all its way through the headers and up to the turbo, then the "leak" would slow down the rate the turbo would be expected to sprin, thus less boost. What about a actuator or wastegate issue?
Rob
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Would you not loose a slight bit of boost pressure with an Up pipe leak?
Surely if the combusted gases are not making all its way through the headers and up to the turbo, then the "leak" would slow down the rate the turbo would be expected to sprin, thus less boost. What about a actuator or wastegate issue?
Rob
Surely if the combusted gases are not making all its way through the headers and up to the turbo, then the "leak" would slow down the rate the turbo would be expected to sprin, thus less boost. What about a actuator or wastegate issue?
Rob
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Graham
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I'd have to agree that the leak should slow spool not increase it. So check for split boost control pipework and any leaky hoses. Get that leak sorted and if it still is over-boosting then bring it up to me and I'll find the problem. Most common causes are splits in boost control pipework.
Graham
Graham
Thanks for your help as always mate
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Graham
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Fear not! I have fixed the problem. Turns out I had replaced a section of boost hose with larger diameter stuff.... What a ****! Original pipe back on and back to normal boost - yippee!
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