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blower test

Discussion in 'Lawn Mowing' started by ow man, Mar 27, 2002.

  1. ow man

    ow man LawnSite Member
    Messages: 111

    The ball test looks impressive, but in the real world, cfm is the name of the game. When you constrict air in a tube you are only using mph, not cfm. I have never blown an area twenty feet long and cleaning only the size width of a small ball. In the tube and ball test, a smaller cfm but larger mph looks impressive, but real world test tells me to look for the most cfm for your cc size of blower. 600 cfm w/ 200 mph will blow wider and farther than a 480 cfm w/250 mph. The ball test is an old salesman's trick that looks good. Trust me, cfm is the name of the game!
  2. TLS

    TLS LawnSite Fanatic
    Messages: 7,943

    A Volume (cfm) of air over a given time is what is moving those balls, NOT the mph!

    If i took my blow gun (air compressor) and hooked it up to that ball test stand, it wouldn't even move those balls. I guarantee that the air coming out of that blow gun is a lot faster than 200 mph! Its only about 10cfm though!
  3. ow man

    ow man LawnSite Member
    Messages: 111

    TLS, I respect your thoughts, but fortunatly I have done some test myself. I work for a major backpack blower co. I cant mention names because I know I'm not to advertise. But we had a normal billiards ball on a table. We had a 1" tube with a rating of 300cfm a/150mph. The ball slowly moved away. At the same time, we had 3" tube at 380 cfm and 100mph. This ball quickly went flying of the table. It was engulfed in air even though it was slower mph. The faster air (constricted like the mfgs tube test) was much slower because only hitting small surface area of ball. Now dont get me wrong, I'm sure the higher constricted mph would move the ball farther, just as the tube test shows. But the point I was trying to make was the fact that in the field, higher cfm will always move MORE debris FASTER with less time and effort. The ball up the tube test could be misunderstood when you actually get the unit out in the open landscape. Thanks for your input, I hope I didnt confuse you.
  4. TLS

    TLS LawnSite Fanatic
    Messages: 7,943

    Its just that one minute your saying cfm is the name of the game (it totally is!), and then next your saying mph is what is really moving that ball in the test?

    Echo is the leader right now with their PB-650. I have one and like it a LOT.

    BTW, if you prefer Redmax, why do you work for Kawasaki?
  5. ow man

    ow man LawnSite Member
    Messages: 111

    TLS, Glad you asked!!!! I work for one of the Distributors for Kawasaki Products. Recently Kawasaki made a changed that rocked our world. They are going factory to dealer direct. Cutting out the distributors. They must be wanting to increase there profit margines. I have no problem with that, they are a fine company that builds quality equip. they were always good to us in the past. My CEO at our distributorship waisted no time looking around to fill this huge gap in our business. So now we are the distributor for the big red ones! (RM) The kawi factory to dealer change officially doesn't take effect until Aug 1. Have you got any of the two above mentioned lines? If so do you like
    them? Nice talking with you. OW
  6. Ground Master

    Ground Master LawnSite Senior Member
    Messages: 505

    just my 2 cents worth.......I own 6 redmax 2300's (handheld). They are the best handhelds that I've owned (and I've many).
  7. hoagie

    hoagie LawnSite Member
    Messages: 222

    If cfm is the main # (which it is, but more importantly a combination of the 2) how is Echo the leader w/ the pb650?

    Echo 650- 205mph/630cfm.
    Redmax eb7000- 204mph/730cfm.

    I too am biased toward my brand (as we all are)... I own 2 eb7000's and have used redmax over the last 8yrs, but there is a reason for that... there's been no good competition to make me switch.
  8. TLS

    TLS LawnSite Fanatic
    Messages: 7,943


    I dont have the Redmax specs handy, but when I was researching my blower, I emailed all manufacturers about cfm ratings and mph ratings. Redmax replied with their specs (I must have deleted the email) and said in response that "of course these #'s reflect the higher [housing] rating and not 'at the pipe' ". "Why would we advertise the lower number [at the pipe] on our brochures?"

    The newest addition to the Echo line-up is the PB-650, the most powerful backpack blower in the industry- 210mph and 650 cfm [at the pipe].

  9. f350

    f350 Banned
    from mi
    Messages: 424

    look in the owners manual for the redmax. it's 700 with no pipe and only like 530 at the pipe.... i looked at this today at the dealer
  10. hoagie

    hoagie LawnSite Member
    Messages: 222

    I'm sorry TLS, I certainly feel like an ass...

    My manual says: w/o pipe- 730 cfm
    w/ pipe- 529 cfm
    200mph max air speed -no pipe specification.

    But something funny is still going on here... the shin eb630 has the exact same engine as the redmax, but it suposedly puts out "613cfm and 201mph nozzle velocity". And one other thing I would like to know is at what rpm all these mfg's are getting their ratings at. You may say "at max rpm, you dumbass", but wait.... ever put your hand over the end of the pipe and the engine will over rev till you let go? I have found on my last eb6200, that if you tighten the handle on the tube a little too much (compressing it), it will blow harder than a brand new 7000. Not very good for the engine, true, but still... makes me wonder in this highly competitive market what people will do for "the best".

    Looks like the ole Hoagiemonster will be adding a new pb650 to his arsenal this season... only way to truly tell is to have them side by side. Till then I promise to stop my 650 bashing!!:D

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