Tom/BRD: Request Your Advice....Bubbles.....Outwards....or....Inwards

[modsl55amg]

Tom,

I am seeing pictures of member's installs with the bubbles Inwards. I am aware of the reason for doing so, but what is your Expert recommendation? Whatever your advice may be, is it the same for all cars, or does the model/style of car and/or the exact position of the sensors on a car dictate if bubbles should be Outwards or Inwards?

Thanks

[Holla]

It does not matter, the sensors are so small the difference between in/out make no difference, he has mentioned that since day 1

[modsl55amg]

It does not matter, the sensors are so small the difference between in/out make no difference, he has mentioned that since day 1

Thanks Holla,

I know what Tom has stated since day 1. However, there seems to be a new trend of thought, espoused by an extremely knowledgeable user of the ALP system, who is also one of the most knowledgeable, if not THE most knowledgeable "shooter" here on the East coast, that although there is only a one inch difference in the bubble position if it is inverted on the car itself, that one inch, when projected hundreds, even a thousand feet or more ahead of a car, will cover/protect/defend a slightly wider angle to the sides of a car, which may be exactly where an "unfriendly shooter" may be positioned.

For someone who has their sensors already installed, it may not be enough of a reason to invert the sensors so that they are bubbles inwards. However, I am having the sensors on my cars relocated and this is a good opportunity to make the change to bubbles inwards, instead of the bubbles outwards, that has been recommended since day 1, if there is even a slight advantage in protection obtained from doing so..

I am just attempting to find out if there may be a change of thought in the position of the bubbles.

[dinkydi]

i think the angles are equal, one advantage to bubbles on the inside, is if they are slightly recessed in the grill with the body of the car protruding forward more at the outer edges from the the grill

[kimberdan]

I will add...with my car..2015 civic si coupe has no real good place to put the heads...so i was questioning this as well...
What was suggested is that I put a pin hole in my tester to narrow the beam and then test that way.
I can tell you that with this method....yes it mad a difference...
My thought on my set up it is.
If I miss the signal from the Leo's lidar I'm screwed...so having the bubble outward (which is what sets the alps off) then I know I have a few seconds to slow...even if they do get a punch threw after I have slowed or while slowing...
If they are flipped and I don't get an alert? Well there unless and theres no point to having them..
So i think that, that half inch or so might...just might help when in a situation like I am...

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[koszor]

@kimberdan I have the same car where did you decide to mount the heads?

[kimberdan]

@kimberdan I have the same car where did you decide to mount the heads?

If this is something you might be interested in doing pm me to discuss...its really quite easy..

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[radargeek]

I prefer bubbles outward since it gives the bubbles a clearer view of the road esp. overhead (for overpass shots) due to the curve of the grill. The diode output starts out narrow coming from the head so recessing the emitter side a tiny bit should have no effect on jamming performance, but recessing the bubble could cause the sensing side to miss the beam from the gun.

From a coverage standpoint bubbles in or out makes only an inch or so difference. If your heads are on the outer limits of distance apart (~24-25") bubbles in would help with picking up CM shots, while if they're close together bubbles out is better.