Compressors Problem

[Gagt518]

Hello, I have a problem that i cant figure out. First off i have air ride on my Pontiac. I have (2) 5 gallon tanks and (2) 450cc Viair Compressors. It takes 6:45 to fill 0-80 PSI. And 0-95 PSI with No Air filter in 6:45 (Only did it 1 time) Your website says it should take (1) 450cc Compressor to fill (1) 5 gallon air tank in 6:45. Is there something wrong with my setup? I wired the compressors together and ran it straight off the battery. My leader hose's are not leaking. What could be wrong if nothing?

[darren@ridetech.com]

Well, we don't sell the Viair 450 compressor, just the 400. And I don't think that we have any of that info on our site. Did you see that on Viairs site?

Anyway......I have Viair catalog and it states that it should take 6 minutes and 40 seconds for one Viair 450C to fill a 5 gallon tank from 0-145 psi. The the Viair 400 should do it in 4 minutes 50 seconds.

Sounds like you compressors may be a little worn, but not wore out. The specs in their catalog may be a little exaggerated too tho.....

[Gagt518]

Yes i got all the info from the Viair Website. You state that the Viair 400CC compressor would fill up faster that the 450CC compressor. Are you sure your correct?

[darren@ridetech.com]

Positive. The 450 puts out .94 cfm @ 100psi and the 400 puts out 1.34 cfm @ 100 psi.

[darren@ridetech.com]

A lot of guys run the 450 because it's 100% duty cycle, but the truth is you don't need 100% duty cycle. The 400 is faster and is a sealed compressor, so you don't have to worry about dust, dirt and water getting into it.

[sirstude]

To run 2 400's do you just hook them both the the same relay, or use 2 relays and tie them to the same trigger wire? Or do you have a setup that I should just buy? I have the Level Pro. I have the room, so I thougt I may as well put 2 compressors on it. I have about 5 gal. capacity with 3 different tanks.

Doug

[darren@ridetech.com]

The relay that you have will hold 40 amps. The Viairs pull about 30. So you will need to purchase an additional relay, part # WIR8500. The ECU has an additional plug (labeled RL2) for the extra relay.

The ecu will actually trigger the 2nd compressor a few seconds after the first to reduce the initial amperage spike seen on compressor start up.

[Gagt518]

Hmm didnt know that

[Gagt518]

Well i went around the city today and talked to a couple owners of Viair 400CC compressors. All 3 of them told me that i should buy the 400 series and sell the 450's. The 400cc pump faster and are a sealed unit. The only downside is it overheats 2x as fast at the 450cc. Pretty much all what Darren stated :) Its either im going to buy 2 400cc compressors to replace the 450's or im going to eliminate 1 5 gallon tank and hook both of my 450cc compressors to the 1 tank. Tell me what you think?

[darren@ridetech.com]

The 400 is a 33% duty cycle pump. For every 15 minutes running it need 30 minutes of cool down time......according to Viairs catalog.

[Gagt518]

I think that should be fine for me :)

[Gagt518]

I keep being told that i have to much air volume. Should i still eliminate a tank?

[darren@ridetech.com]

One tank is enough, but if you play with it the second tank is nice.

[Gagt518]

Okay thanks for the help Darrin. I just sucked up and bought 2 Viair 400cc's for $295 Shipped. Would there be any demand in my used 450's forsale on this forum?