Author Topic: Boost Buzz?? (Read 2664 times)

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.

Vincent Waldon · « **Reply #1 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 .

ein bora · « **Reply #2 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.

smutts · « **Reply #3 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.

ein bora · « **Reply #4 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??

Jettage1 · « **Reply #5 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)

smutts · « **Reply #6 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:

Jettage1 · « **Reply #7 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.

ein bora · « **Reply #8 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.