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Old Jul 11th, 2018, 23:54   #46
dingov70
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Last Online: Yesterday 07:47
Join Date: Jan 2015
Location: Blackpool
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HI Bio , NO there are no legal noise limits prescribed in the test manual , the only requirement is for a continuous tone , not alternating / harsh or grating .

I actually have train horns under my Sprinter , fed off a 9lt air receiver filled up by a Range Rover air suspension pump . Button on gear lever , both sound
( hidden buttons ............................... work each horn independently )

50 PSI loud ................... 130 PSI doors rattle
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