VWDiesel.net The IDI, TDI, and mTDI source.

General Information => Upgrades (non engine related ) => Topic started by: ein bora on April 06, 2009, 10:34:53 am

Title: Boost Buzz??
Post by: ein bora on April 06, 2009, 10:34:53 am

So I installed a set of isspro gauges which includes a mechanical boost gauge. Upon acceleration I'm hearing a buzzing type of noise coming from the gauge?? It's only there when accelerating and stops when decelerating?? I also thought it could be a vibration with the boost line/hose - any ideas what it might be. Gets annoying.

Title: Boost Buzz??
Post by: Vincent Waldon on April 06, 2009, 12:26:35 pm

Yup, there will be some oscillations in boost pressure that cause many needles to "buzz"... several vendors (Draft42 for example) sell a boost hose T with a restriction specifically to damp this annoying noise.  I have one... works great.

If you can't find one locally Concept 1 in Calgary has 'em... 3/4s of the way down this page:

http://www.concept1.ca/engine%20gauges.htm


It's their part number 42D 42-003 .

Title: Boost Buzz??
Post by: ein bora on April 06, 2009, 03:08:34 pm

Quote from: "Vincent Waldon"

Yup, there will be some oscillations in boost pressure that cause many needles to "buzz"... several vendors (Draft42 for example) sell a boost hose T with a restriction specifically to damp this annoying noise.  I have one... works great.

If you can't find one locally Concept 1 in Calgary has 'em... 3/4s of the way down this page:

http://www.concept1.ca/engine%20gauges.htm


It's their part number 42D 42-003 .

Thanks for the info! much appreciated.

Title: Boost Buzz??
Post by: smutts on April 06, 2009, 03:25:24 pm

Or stuff some cigarette filter cotton into the pipe until it shuts up. The buzz is the guage trying to respond to the 30 odd sucks a second as the engine cylinders each breathe. The gears in the guage will wear out fast too.

Title: Boost Buzz??
Post by: ein bora on April 06, 2009, 05:27:03 pm

Quote from: "smutts"

Or stuff some cigarette filter cotton into the pipe until it shuts up. The buzz is the guage trying to respond to the 30 odd sucks a second as the engine cylinders each breathe. The gears in the guage will wear out fast too.

Pipe - what pipe??

Title: Boost Buzz??
Post by: Jettage1 on April 06, 2009, 09:49:44 pm

Someone else posted a fix where he gently melted the plastic tee branch going to the gauge & then put a tiny hole in the melted end, thereby making a cheap restrictor.  I'm not claiming credit for the idea - just can't remember where I read it.  

I've been using a clothespin on my rubber line until I get around to either buying a restrictor tee or doing the melt mod...  It's really shade tree, but it does stop the buzz.  Maybe I should just paint the clothespin black & chrome the spring... :shock: (only kidding)

Title: Boost Buzz??
Post by: smutts on April 14, 2009, 03:44:29 pm

Quote

Pipe - what pipe??

The one from your new guage to wherever it taps into the boost plumbing. :wink:

Title: Boost Buzz??
Post by: Jettage1 on April 14, 2009, 05:40:33 pm

Reporting back... I did the "melted tee" mod.  It does work and is very easy.  It doesn't take much of a hole, though.  I used a pin, and only pushed it in maybe 1/16".  Have just the faintest buzz now - not really annoying.

Title: Boost Buzz??
Post by: ein bora on April 16, 2009, 10:34:47 pm

Quote from: "Jettage1"

Reporting back... I did the "melted tee" mod.  It does work and is very easy.  It doesn't take much of a hole, though.  I used a pin, and only pushed it in maybe 1/16".  Have just the faintest buzz now - not really annoying.

Ya - I tried it too, but maybe my hole is still to large as it's better but not were you are with your's.  I'll try again. Thanks for the update.