View Single Post
Old Sep 2, 2008 | 01:40 PM
  #9 (permalink)  
waldig's Avatar
waldig
Senior Member
Joined: Feb 2008
Posts: 4,508
Likes: 34
From: VA
Default Re: supercharger clutch noise

Let me tell you a story.

i liked the idea Steve had so I added an LED to the I/C pump and the S/C pump. Nice.

Went thru the tech inspection on Saturday, when the hood closed it pinched the cable that I used and it shorted out the 12 volts blowing the I/C pump fuse. I was in line and had to do my runs without the pump, and it got hot, intake was at about 210 degrees measured inside the plenum.

I have since rewired the circuit so that the led has a 1000 ohm resistor at the source end of the cable so that a short further down the cable just blanks out the led. THe fuse and the pump or S/C will operate as normal, just the light is off till its fixed.

FYI, Woody

LEDs operate at low voltage and need to have a current limiting resistor, positioning it on the INPUT end of the cable makes it a more bullet proof design.
 

Last edited by waldig; Sep 2, 2008 at 02:17 PM.
Reply