Noise filter, off subject

[Chief]

I have an interference problem with a radar detector, Uniden 2100W.  I have
HEI ignition w/Accel supercoil.  Problem is, if I rev the motor above 2000
rpm the laser goes off full blast.  Major problem.

Supposedly I need a noise filter.  Are there any cheap fixes or
recommendations for an inexpensive noise filter.  I trust the opinions of
the list members for more that my local, pimple faced Radio Shack saleperson.

Do any of yall experience such problems with modified ignitions, computers,
etc. in your DIY efforts?

Ed Hilker aka "Chief"
84'SS - 700R4