Sooooo I managed to shinagle some airhorns from the roof of an RV in a wrecking yard. No idea on there working condition but whatever, they were free and just need a little cleaning up. One is 30" one is 33"
Heres a few pics.
And I made a vid just shootin some compressed air into the line from my garage compressor @ about 75psi
Soooooooo, I want these in my car. What the heck do I need to buy now. I know the basics like tank/compressor/1/4" line. But what I dont get is the pressure switches and relays and what have you. Im not great at that.
Id like to buy the stuff locally since shipping to canada is not fun. I just want to be able to push a button, or open a swing valve from inside the car obviously to make the horn blow. I dont want the compressor always running either… just when I wanna use it. But if a motorist jumps infront of me that Id like to get there attention, Id like for the horn to probly work instantly and not have to wait for the tank to fill. I also dont know how big of a tank I need here, would a 1/2gallon tank work?
always remember you get what you pay for… the compressor you posted isnt reliable, sure it will work, for about 3 weeks. $125 isnt enough to have even the bare minimum air set up, you need more than a tank and compressor
the compressors look like viair replicas but I doubt if they offer the same performance. if you want to compare, compare the amps/psi/cfm rating table from the ebay page and the viair website. the ones in ebay show less current draw and more cfm for the same psi, looks good? I don’t know but I trust Viair more.
I’m using the same compressor and it’s doing it’s job well. just remember the saying “you get what you pay for” holds true most if not all of the time.
Electric motors vary in efficiency from brand to brand. None are 100% efficient, but within a small margin: more power consumption generally means more power. e.g.: a 26 amp pump is typically going to be more powerful than a 16 amp pump.
High CFM ratings don’t mean a lot unless they are at pressure (unless specified, they won’t be). Without resistance a weak pump can put out a lot of CFM, but test the same pump at 100 PSI and it might not hold up so well.
Viair and Oasis both give detailed CFM/amp ratings at different pressures for a reason: they make quality pumps.
I had another look at the ebay compressors. it shows they do have higher cfm ratings than viair but it drops off once the pressure builds up. the Viair’s I looked at showed a lower cfm at low pressures but maintains a higher CFM under pressure than the lower cost counterparts. I noticed it with mine when I switched from the china cheapo to a 275C. the chinese comp slows down when pressure gets above 80psi. with the 275C, you can still see the needle moving till it shuts off. OK enough of that, I think we already know that good comps don’t come cheap.
I think I bought two viair 450c pumps for 300 from hornblasters and thats cheap if you ask me. I shouldve bought an oaisis though:mad:
my pumps dont run too often but when they do the sound solid and top off a 8 1/2 gallon tank in under a minute.
OK enough of that, I think we already know that good comps don’t come cheap. 