surge?

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Mar 25, 2007 | 10:59 AM

blrman1962

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From: CT

surge?

How do I know what a surge is? I am a newbie to PSD and if this damages the turbo I need to know Thanks

Mar 25, 2007 | 11:22 AM

indebt

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From: Visalia CA

you'll get a "woosh woosh " type sound when under load around 1800-2000 rpm range. Its pretty noticable you cant miss it.

Mar 25, 2007 | 11:28 AM

Texas Outlaw

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From: Cut & Shoot, Texas

Watch your boost gauge. Along with the "chuffa chuffa" sound you will see your boost gauge bounching up and down.

Someone posted a good video of turbo boost a couple of weeks ago but I cannot find it now. You could really hear it and see the boost gauge bouncing.

Mar 25, 2007 | 11:43 AM

ernesteugene

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From: Fulltime RVer

Read this thread https://www.ford-trucks.com/forums/594539-so-did-the-quikfilter-6637-but.html regarding whoosh and chuffa, chuffa noises.

Mar 25, 2007 | 01:38 PM

bbunting

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From: CR, IA

Quote:

Originally Posted by Texas Outlaw

Here is the best example I've seen

LINK

Mar 25, 2007 | 02:52 PM

Layson

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From: Millersburg, OR

Mine would stall... making a loud chirping noise. It doesn't sound good. The whooshing sound I thought was normal...

good luck,
Steven

Mar 25, 2007 | 03:15 PM

Texas Outlaw

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From: Cut & Shoot, Texas

Quote:

Originally Posted by bbunting

Here is the best example I've seen

LINK

That's the one that was posted.

That is surge. Don't confuse the open intake "whoooooosh" with surge.

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Mar 25, 2007 | 03:49 PM

ernesteugene

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From: Fulltime RVer

Quote:

Originally Posted by Texas Outlaw

That is surge. Don't confuse the open intake "whoooooosh" with surge.

The basic definition of surge that I've seen, is when the compressor wheel can't maintain the boost at a given level (for whatever reason), and the boost air is released back through the turbo inlet. For a whoosh, the rapid let off of the throttle causes a loss of drive pressure on the turbine, and the compressor can't maintain the boost which relieves itself as a whoosh. This can be minimized by not letting off the throttle too quickly.

The chuffa, chuffa, and chirp, chirp, types of surge are caused by repeating compressor stalls which allow a momentary back flow of boost air, followed by rapid recompression because the throttle is still being applied and the turbine still has drive pressure. The only way to stop this type of surge, is to let off the throttle some and downshift to a lower gear.