My question is, must the diffusers be flush with the leading edge of the car or can they be tucked back a bit (maybe 1/2" to 1") inside the grill opening and still be effective?

I am going to mount the front laser diffusers in front grill opening on either side close to the headlights as my front plate is not installed.


(I posted this in the audio/electronics section too)

 

I have been under the impression that the device is illegal. Can you comment on this? My understanding is they need to be looking ahead, so I think your location is fine.

Todd

 

Laser diffusers are not illegal in any state that I am aware of.

Radar Jammers, on the other hand, are illegal everywhere (to my knowledge)

 

RADAR is regulated by the FCC and automobile radar jammers are Illegal.

LASER is regulated by the FDA and, at the moment, LIDAR diffusers ARE LEGAL.

Now, does anyone have any information as the effect on the effectiveness of the laser diffuser being tucked back a half inch inside the grill on the C6 or should it be flush mounted with the leading edge of the car?

Thanks.

 

Laser shifters are illegal or their use is restricted in 4 states: California, Minnesota, Oklahoma and Utah.

 

Anything that hinders the laser beam having a clear shot at it will effect it. If you figure most cops are shotting lidar from the window height, you may have a problem since the angle of the beam may be blocked by the front nose cover(assuming you mount under it like you mention).

Is this device you are looking at simply a reflector(spreader I guess is a better term) of sorts? I think I was thinking of the active devices that send out pulses on the same wavelength.

Todd

 

That'll be just fine. The shifter is only going to do you any good when the cop is over a hundred feet down the road, so that's where the beams have to have a view. Once you get close enough for an off axis angle to matter, the lidar will burn through the jamming anyway.

 

Thanks for the reply.

The line of sight idea makes sense.

I'll be sure and place it where it has the largest field of view but tuck it in 1/2 inch to keep from calling attention to the diffusers.


Any contrary theories out there?

 

I checked the installation manual for both the ZR3 and 904. Neither identifies any restrictions as far as recessing the front units. The emphasis seems to be on level placement.
I'm planning to do the same on mine. Let me know how it went.

 

Do you really think that little black thing could be noticable from a distance on the black grill while car is moving? Also why would you pay attention to the grill escpecially on a C6 coming by your going to look at the car itself.

 

Let's say I do get pulled over for say...no front license plate...I don't want to give the guy any more reasons to be hard-nosed with me.

The diffusers are pretty easy to spot if you flush mount them with the leading edge of the car. I was just curious how tucking them back in a little would effect the performance.

 

PLUS they really don't work!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

Edit: Chad: please read on to the later posts....

 

Stanleyp seems to me we disagree alot tonight because it has worked for me I have one in my Harley truck and the wifes SUV and will be in my Vette in a couple of weeks.

 

I have seen several articles in the last year about passive diffusers and most seem to point to them not being very effective. The units that send out interfernce pulses, a true jammer, are much better in giving an error reading on the lidar units, but those are illegal in all states from what I understand.

Todd

 

Passive systems are a joke. They do not work. The active laser jamming systems do work, and has been posted already in this thread, they are legal in most states. Unlike radar jammers, which are illegal federally and in many states, infared light emitters aren't so tightly regulated.

The FDA has a max power regulation, but all currently sold laser jammers are within the FDA "eye safe" limits, so no problems there. Only 4 states have laws specifically worded to include all types of jammers, not just radar jammers. So if you aren't in one of those four there's no law against having infared emitters on your car.

I had the opportunity to test the Escort Shifters against the Atlanta Laser system used by local police (neighbor is a cop). With the Shifters off, he could get a valid speed reading on my car (at that time a 350Z) at 1500 feet. With the Shifters on, I had to be right on top of him, between 100 and 200 feet, before he could get a valid reading. Meanwhile, the Shifter was squalling a warning the whole time he was trying to get a reading. In other words, *lots* of time to slow down if it had been a for real speed trap instead of a friendly test. I've now mounted the shifters on my new Corvette. Under actual speed trap conditions, I haven't been ticketed yet. I have a good deal of confidence in this system.

BTW, Atlanta Laser is the top manufacturer of laser speed measuring equipment. The reason it (and others of its type) can be fooled is that it requires 50 consecutive pulses to get a valid speed reading. It measures distance travelled over that period to compute speed. Invalid pulses cause it to restart the 50 pulse sequence. The pulse rate of the Shifters has been chosen to invalidate the pulse sequences of laser speed measuring equipment.

Now this is a technological war, and the lidar makers will certainly come up with a way to defeat the current jammers. Then the jammer makers will come up with a way to beat the new systems. Etc. It is a never ending arms race. But right now the jammers are winning.

 

shopdog:

Thanks for your comments. Now that begs the question, where, exactly, did you mount your front laser diffusers on your new Vette?
Any photos?

Thanks.

 

Shopdog,

Good info, thank you for sharing.

Todd

 

No pix. Mine are mounted in the grille with double stick tape.

 

Where did you run the wires through the firewall? Did you have to drill?

 

Also, some reading:

www.speedzones.com
www.radartest.com

They have distances for each of the different manufacturers on how effecitvely they jam the LIDAR gun.

If someone could post pics of their install that would be excellent as I am also looking into installing a similar system (the Bel RX75 remote system).