upperblack
SILVER Star
this version of the viair is a more direct competitor to the MV50 vs the one I have
http://www.amazon.com/gp/product/B005ASY23I?redirect=true&ref_=s9_simh_gw_p263_d0_i2
Just presenting other options
Tires...how low do you go and what do you use to re-inflate???? (1 Viewer)
- Thread starter tls3601
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
this version of the viair is a more direct competitor to the MV50 vs the one I have
http://www.amazon.com/gp/product/B005ASY23I?redirect=true&ref_=s9_simh_gw_p263_d0_i2
Just presenting other options
- Joined
- Jul 20, 2004
- Threads
- 274
- Messages
- 23,205
- Location
- Chandler, AZ
- Website
- www.tontorecreationalliance.org
Maybe from a price perspective? But the MV50 and Viair 400 have the same output and the Viair 88 has about half, so from a displacement/performance point of view, the MV50 and Viair 400 are most closely matched.
It's weird, the MV-50 should have a higher price when compared the other units and the MV-90.
when I ran 33x12.50...
Street 21 psi
Rocks 12 psi
I tried 10 psi once... bounced a bit and bunged a bead... had to hammer it straight to get the rim to hold air again.
Re-inflation: Converted A/C compressor and a 40 pound propane tank to hold air... soon to be replaced with tanks off a 4 gal compressor (needed to move the tank to make space for rear fuel tank).
Street 21 psi
Rocks 12 psi
I tried 10 psi once... bounced a bit and bunged a bead... had to hammer it straight to get the rim to hold air again.
Re-inflation: Converted A/C compressor and a 40 pound propane tank to hold air... soon to be replaced with tanks off a 4 gal compressor (needed to move the tank to make space for rear fuel tank).
- Thread starter
- #25
bikersmurf...sounds like a sweet setup!!!
- Thread starter
- #26
I have good friend that just moved back to Victoria.....gorgeous area!!!!!!!!!!!!
On snow, I generally simply go straight to 7 psi
Last edited:
filling space
Last edited:
- Joined
- Jul 20, 2004
- Threads
- 274
- Messages
- 23,205
- Location
- Chandler, AZ
- Website
- www.tontorecreationalliance.org
What do you use for valve stems, some kinda big bore stems? Even a 1/4" hose will outflow a normal valve core/inflator.
- Joined
- Jul 20, 2004
- Threads
- 274
- Messages
- 23,205
- Location
- Chandler, AZ
- Website
- www.tontorecreationalliance.org
What brands have you seen this type of problem with, that would be helpful for those who are shopping?
What do you use for valve stems, some kinda big bore stems? Even a 1/4" hose will outflow a normal valve core/inflator.
then an air tank is unnecessary, too? even a 1/4" hose will get plugged with moisture because you've heated the air... but, you're just trolling, right?
I gave 3 options in my post.... how many more do you need? As for crap, I don't have the time nor the desire to list all of them. But you do have a nice day.
What do you use for valve stems, some kinda big bore stems? Even a 1/4" hose will outflow a normal valve core/inflator.
Seems obvious to me too. This is just the correct analysis.
Come awn, this isn't trolling; it is just correcting things that are wrong. Last time I checked, moisture flowed pretty well out of my hose and didn't plug it.
Volume is determined, in part, by moisture content of the air. Further, while it is true that a regulator will reduce flow, the amount of flow is determined by the volume on either side of the restriction.
So basically, according to your assertion, if you fill the hose with water, it won't affect flow... nor will heated air cause any reduction in flow... lol
What's even funnier, to me, is the arrogance of your statement - according to your universe, the Vortec head that GM built is nothing more then rubbish... after all, it's a 1.94 valve in everything prior to it and after thus it's certainly not any better.
Tell you what, I'll go ahead and simply delete what I said before about air compressors, seems you all have lots more experience and whatever I say is nothing more than fodder for you all to want to fight. I want no part of it or you.
good luck
So basically, according to your assertion, if you fill the hose with water, it won't affect flow... nor will heated air cause any reduction in flow... lol
What's even funnier, to me, is the arrogance of your statement - according to your universe, the Vortec head that GM built is nothing more then rubbish... after all, it's a 1.94 valve in everything prior to it and after thus it's certainly not any better.
Tell you what, I'll go ahead and simply delete what I said before about air compressors, seems you all have lots more experience and whatever I say is nothing more than fodder for you all to want to fight. I want no part of it or you.
good luck
Last edited:
- Joined
- Jul 20, 2004
- Threads
- 274
- Messages
- 23,205
- Location
- Chandler, AZ
- Website
- www.tontorecreationalliance.org
From a using tools, blow gun, etc, perspective an air tank has an advantage. From a strictly airing up perspective, the tank helps on the first tire, hurts the rest. For most OBA setups, having a tank extends overall air up time.
Heated air carries moisture as vapor, never seen it plug up a hose? Have you looked at the size of the tiny ports in a typical schrader valve? One would think that they would be plugged long before a 1/4" hose? A 1/4" hose will flow much more CFM than a typical tire schrader valve.
Yep, just trolling.
We wheel often, with a very diverse group, have seen a few problems, but not like you mention, so wondering what brand(s) you have seen problems with? The ones that we are around get used/abused often, so some wear/carnage is expected.
Really? You are just going to double down on hyperbole rather than refute the argument that the Schrader valve is the bottleneck for air flow?
simple... I gave you an example - the chevy vortec head, it gets more volume through the same space.
but I don't have to use hyperbole, I have a 1/4" hose - it's nearly brand new because I believed a moron who said what you just said. I have a 3/8" hose and it DOES take 10 minutes LESS to fill then it did with the 1/4" hose. I do this all the time (go off-road and use air compressors) - but I'm certain you know more... so please... carry on.
but really, you know it all - you tell them. as I said, I'm done.
but I don't have to use hyperbole, I have a 1/4" hose - it's nearly brand new because I believed a moron who said what you just said. I have a 3/8" hose and it DOES take 10 minutes LESS to fill then it did with the 1/4" hose. I do this all the time (go off-road and use air compressors) - but I'm certain you know more... so please... carry on.
but really, you know it all - you tell them. as I said, I'm done.
oh no, you know it all... please carry on. I deleted what I said about compressors so that you can fill the void with your hot air.
- Thread starter
- #38
Reliability of the air pump is probably my main concern................I do realize the cheaper ones do probably run hot. I appreciate all the good input. Think I will start at 15 psi and adjust from there...................I have been running the tires at 30 psi on the road with very even wear.
- Thread starter
- #39
65swb45 I like the analogy of choosing pressure like a golfer chooses clubs.
I have 45 years of off road experience with air compressors, so I learned some lessons the hard way. I blamed the compressors when it was my fault. It is all about how much air you have to compress and how much you have to compress it. Compression takes power. Power is the product of watts times amps and 1 horspower is appproximately 750 watts or 15 volts at 50 amps. It takes my 3 hp, 120 volt 20 amp compressor about 1 minute to inflate a 35 inch tire from 10 PSI to 30 PSI. Not surprisingly it takes the same power for my 1/3 hp compressor to inflate the same tire in 10 minutes. It is unrealistic to think that any 1/3 hp 12V compressor is going to inflate your tire any faster.
The other issue is heat. Compressing air creates heat. Any volume of air compressed to the same pressure is going to create the same amount of heat no matter what size the compressor. The big difference is the duty cycle or the amount of time the compressor can be safely run in a 10 minute interval. While the big 3hp compressor has a 100% duty cycle, the little 1/3 hp compressor has a duty cycle of 20-40% meaning it can run 2 to 4 minutes before cooling for the rest of the 10 minute cycle.
The whole point of this is that 1: People have unrealistic expectations of how long it takes to inflate their tires and 2: they exceed the duty cycle, leading to overheating and failure. Chill out and take your time inflating your tires with the tiny 12V compressors and they will last.
The other issue is heat. Compressing air creates heat. Any volume of air compressed to the same pressure is going to create the same amount of heat no matter what size the compressor. The big difference is the duty cycle or the amount of time the compressor can be safely run in a 10 minute interval. While the big 3hp compressor has a 100% duty cycle, the little 1/3 hp compressor has a duty cycle of 20-40% meaning it can run 2 to 4 minutes before cooling for the rest of the 10 minute cycle.
The whole point of this is that 1: People have unrealistic expectations of how long it takes to inflate their tires and 2: they exceed the duty cycle, leading to overheating and failure. Chill out and take your time inflating your tires with the tiny 12V compressors and they will last.
Last edited:
