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walkerowner06
10-23-2006, 07:12 PM
Has anyone noticed that Shindaiwa changed the cfm rating on the eb8510 on their website. It used to say 952cfm at the housing now is says 1349cfm at the housing. does anybody know why?

stevesmowing
12-07-2006, 01:03 PM
hummm that is odd.

newz7151
12-07-2006, 02:41 PM
I believe the housing and possibly the fan was redesigned. Or, somebody goofed the first time.

ed2hess
12-07-2006, 05:56 PM
What is the reason for giving the cfm at the housing? I am beginning to wonder about these blower guys and their ratings? Echo constructed a big vertical tube with a ball in it and you shoot the air from blower into it at the bottom and forced the ball up the tube. ..that seemed to be a reasonable test?

BSDeality
12-07-2006, 05:59 PM
What is the reason for giving the cfm at the housing? I am beginning to wonder about these blower guys and their ratings? Echo constructed a big vertical tube with a ball in it and you shoot the air from blower into it at the bottom and forced the ball up the tube. ..that seemed to be a reasonable test?Thats similar to how I compared my 8510 to my echo 750. I used a womens basketball, no tube to hold it though, just clamped the tubes vertical and revved them up to full throttle. There was a clear winner.

zeroturner
01-03-2007, 02:29 PM
I emailed Shindaiwa and received the following explanation from one of the Tech Service Reps.

"Sorry I have been out of the office, in fact I still am. The 1349 is accurate from the volute case housing. The old ratings were at the nozzle and the elbow coming out of the volute case. We changed it to reflect the volute case where our competitors measure their cfm ratings."

Envy Lawn Service
01-03-2007, 10:36 PM
I emailed Shindaiwa and received the following explanation from one of the Tech Service Reps.

"Sorry I have been out of the office, in fact I still am. The 1349 is accurate from the volute case housing. The old ratings were at the nozzle and the elbow coming out of the volute case. We changed it to reflect the volute case where our competitors measure their cfm ratings."

Thanks....

I was just trying to explain this concept in another thread sometime last month I think. I wish I could remember which thread (soooo many blower threads).

Anyways, that's what I was trying to explain, but did not know the right term.
"volute"

Some MFG's mean "without tubes" when they say 'without tubes'.
Other MFG's mean "at the housing" when they say 'without tubes'... (AKA at the volute case.

I understand why Shindawia changed and RedMax should do the same!
Something needs to be standardized because the specs advertised can be very misleading.

I am for everyone stopping the "at the housing" ratings.
That measurement is pointless because it is not USEABLE!!!!!!!!

As an owner of multiple brands I can assure you that this IS IN FACT THE CASE.
Some do rate them at the casing for "without tubes"....
Others remove the removeable tube sections for rating "without tubes"

Take the RedMax 8001's.... 943 cfm 'without tubes'
In my experience with multiple brands, I can tell you that rating is USEABLE.
In other words, that means 943 cfm with the 2 tube sections removed.
So that's 943 CFM just past the joystick basically.
Trust me... it's USEABLE too... in fact the only blower I've found useable that way.

After buying the 8001's MUCH became clear to me about blower ratings.
All you have to do is look at the differential in the specs to tell what 'without tubes' means.
If the differential is HUGE between 'with tubes' and 'without tubes'....
Well then that's a dead give-away they measure at the housing itself for that big number.

stevesmowing
01-27-2007, 04:46 PM
So what you are saying envy is when I use my rexmax 8000 with out any of the tubes, just the one that has the handle on it that the blower is putting out 943
cfm?

Envy Lawn Service
01-27-2007, 08:41 PM
So what you are saying envy is when I use my rexmax 8000 with out any of the tubes, just the one that has the handle on it that the blower is putting out 943
cfm?

Yes... that's what I'm saying.

This is the specific reason why other blowers may spec at 1,000 - 1,200+ CFM...
Yet they don't move near as much air as the RedMax.

It's all in where and how they measure the CFM...
And relatively speaking, nothing is close to the RedMax in air volume.

I mean really... think about it... how many backpacks have you used with no tubes... and how many can work like the RedMax can without them?