Hi, which is best / loudest? The proper k5la cast
Manifold or the seperate mounted brackets?
The manifold only has a small hole where the main pipe fitting goes
On so isnt that a restriction? Compared to the seperate mount
Brackets you can buy?
Hope somebody can answer this…
Cheers jay.
The restriction on the Airchimes is actually in the inlet of the horn itself. It’s only about 3 millimeters from memory. The manifold itself therefore flows more than what the horns are capable of consuming. It won’t make any difference going to individual mounts in terms of loudness. The main thing you have to ensure is that you can keep up enough flow volume.
Some people have drilled out or enlarged the inlet on the horns themselves - and yes, this will make them more aggressive and louder because they tend to flow more air. A similar result can of course be also achieved by increasing pressure (more pressure = more flow; eg. via 200psi system). The downside here being that the nozzles and diaphragms will wear prematurely. Sustained 200psi is almost impossible anyway since you have to spend LOTS of dollars to get a high volume system that holds this much pressure. So… short bursts at 200 - that quickly drain to the more reasonable levels are kind of fun every now and again, but there is really no need to do so because the gain in volume is marginal and doesn’t suit the acoustic quality of the horns at all. IMO they sound their sweetest around 100psi mark (running a 1/2 line directly to the inlet on the manifold) and at that level they are still more than capable at permanently damaging someone’s hearing and need to be treated with appropriate respect.
Wow thanks so much for the detailed reply 
That pretty much sums it all up…
Nice one
If you need a compact system, you can get tanks and compressors rated for 200 PSI and fill to that level, and then use a regulator to get 120 PSI or so for the horns. This will allow you to pack more air in the tank for longer and more frequent honks. The downside is that 200 PSI is hard on compressors even if they are rated for it, and they are more likely to fail. Also you have to use a high CFM regulator which isn’t always cheap.
So are you going to re-use your existing individual manifolds now Jay?
Thanks for the replys guys 
Pete, im not a big fan of the seperate brackets
At the moment, all ive had is grief… The fittings corroding
And siezing up, and the plastic fittings cracking and
Breaking causing the pipes to come off.
Ive now got a bigger problem…
As i didnt know the pipe had been broken off the largest horn for
Some time and not connected, ive now tested each individual horn seperatly
And the big one of the five isnt working 
It must be siezed up!! Arrrrrggghhhh!!!
Ive tried spraying wd40 in but with no luck!
Ive now taken the top off the horn, but how the hell does it come
Apart?? Anyone know? And will it need a repair kit or just need freeing off?
Mmm…
It’ll just be some corrosion holding the cap on. Just give it a tap or a slight turn and that should free it. If you haven’t had one apart before, check some video clips on youtube… for example:
If you want to persist with the individual horn mounts, change those plastic elbows to some good all metal or nickel plated version (e.g. from Parker Legris). They’re a bit more costly but worth it. I’ve had mine running for years now without issues.
High CFM regulators also tend to be much bigger/bulkier than their lower CFM counterparts.