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Re: BTI vs FDR Air Intake
  #16 (permalink)  
Old September 4th, 2008, 12:52 PM
Renegade Renegade is offline
 
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Re: BTI vs FDR Air Intake

It(DFR/BTI CYCLONE),buys you a larger filter more horse power, bolt-up ready unlike UMP, sturdy design and a lifetime guarantee(except the filter element, duh), proven track record. Bling is just a benefit from making them from billet. You just have to get more info before jumping to conclusions. I have the DFR filter and its tits on design & filtration.
Ontheir website it states a 494% more filtration area = more CFM = more horsepower(no more choking the engine.

Water Proof and Semi-Sealed, also available with burp valve evacuator on the end cap.

Desert version with vents on the canister, no need to use crappy stock air box. Used for years on Baja 500 racers , pre-runners. reconfigured for the RZR

Last edited by Renegade : September 4th, 2008 at 01:01 PM.
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Re: BTI vs FDR Air Intake
  #17 (permalink)  
Old September 4th, 2008, 12:56 PM
simadownow6988 simadownow6988 is offline
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Re: BTI vs FDR Air Intake

Renegade is right. Definately do your homework. He is sold on his DFR, but I actually lean towards the UMP. Again, its all personal prefrence. I just didnt want to pay more for billit aluminum. The aluminum that UMP used is great and far superior to the plastic stock boxes.
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Re: BTI vs FDR Air Intake
  #18 (permalink)  
Old September 4th, 2008, 01:15 PM
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Re: BTI vs FDR Air Intake

i just want more air
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Re: BTI vs FDR Air Intake
  #19 (permalink)  
Old September 4th, 2008, 01:20 PM
simadownow6988 simadownow6988 is offline
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Re: BTI vs FDR Air Intake

I think that if you just want more air, use the stock filter.lol
The better the media in a filter, the more restrictive they will be. More surface are helps a little to counterbalance that problem, but more air is not a definate in these. Some claim more cfm, but its really hard to achieve with a 100% better filter replacement. Better look at studies and proof before you buy if airflow is what your looking for (no matter what brand it is).
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Re: BTI vs FDR Air Intake
  #20 (permalink)  
Old September 4th, 2008, 01:37 PM
Renegade Renegade is offline
 
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Re: BTI vs FDR Air Intake

OMG!! you got to be kidding, do you have a DFR or BTI filter????Look at the forums more closely and you'll see what people are saying about their filters. its a no brainer . The best alternative out there. Better check you compression too!!
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Re: BTI vs FDR Air Intake
  #21 (permalink)  
Old September 4th, 2008, 01:38 PM
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fanjules fanjules is offline
 
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Re: BTI vs FDR Air Intake

Quote:
I think that if you just want more air, use the stock filter.lol
I disagree, the stock filter has 1/5th the filter area and I don't think it's THAT much more porous to let more air through. The BTI unit feels a little more torquey in any case so I would be VERY surprised if it allowed less air to pass.
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Re: BTI vs FDR Air Intake
  #22 (permalink)  
Old September 4th, 2008, 01:39 PM
Renegade Renegade is offline
 
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Re: BTI vs FDR Air Intake

Thanks for agreeing also, The CYCLONE is 8" x 12"Lg vs UMP's 6" x 8"Lg go figure
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Re: BTI vs FDR Air Intake
  #23 (permalink)  
Old September 4th, 2008, 01:41 PM
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slc1lxn slc1lxn is offline
 
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Re: BTI vs FDR Air Intake

Alba Action Sports has the UMP Superfilter Kit list for $320 and free shipping.
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Re: BTI vs FDR Air Intake
  #24 (permalink)  
Old September 4th, 2008, 01:44 PM
simadownow6988 simadownow6988 is offline
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Re: BTI vs FDR Air Intake

It was a joke......

OMG!!! Yes, I know what people are saying! I did research too. Its all about peoples prefrence! If I poured Odules near beer in a Bud cans, there would be alot of drunk people in here as well. Both filter kits are far better that the stock one, so its up to the buyer.
Glad you like the DFR. I would have probably liked it too. Im not bad mouthing anyone here, I just like the UMP.
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Re: BTI vs FDR Air Intake
  #25 (permalink)  
Old September 4th, 2008, 06:41 PM
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Re: BTI vs FDR Air Intake

GERBER, do you mean the intake tube going into the filter housing?
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Re: BTI vs FDR Air Intake
  #26 (permalink)  
Old September 4th, 2008, 07:35 PM
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Re: BTI vs FDR Air Intake

You guys are getting a little carried away with the filter size thing. The Rzr runs great with a brand-new stock paper filter doesn't it? Does doubling the filter size get you any real increase in power? I doubt it could be measured. Some facts:
Stock 4x7 filter = 88 sq. in. of surface area
P181050 filter in UMP is a 4x10 filter = 125 sq. in. - A nearly 50% increase.
P181054 filter in BTI is a 6x12 filter = 339 sq. in.

So the Donaldson filter used by UMP is already a 50% improvement over the stock filter but it isn't for more power--it's to hold more shit. The stock filter holds a lot of shit, too, but the issue is how much of the nearly unmeasurable fine dust that gets through it.

Someone over at PRC posted some interesting filter facts many months ago. I don't know who, what or when and I'm not going to go dig it up but the essence of it was this:
Say Brand X filter traps 99.8% of 10 micron particles and is considered an excellent filter.
Brand Y traps 99.9% so it's only .1% better and probably not worth the bother, right? Wrong! It's 100% better because the amount that got through was 1/2 what Brand X passed. That makes Brand Y an amazing filter even though it would be very hard to measure or see such a small difference.
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Re: BTI vs FDR Air Intake
  #27 (permalink)  
Old September 5th, 2008, 02:17 AM
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fanjules fanjules is offline
 
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Re: BTI vs FDR Air Intake

Quote:
Originally Posted by guy48065 View Post
Stock 4x7 filter = 88 sq. in. of surface area
P181050 filter in UMP is a 4x10 filter = 125 sq. in. - A nearly 50% increase.
P181054 filter in BTI is a 6x12 filter = 339 sq. in.
Doesn't that disregard the depth of the pleats though? If the pleats are deeper then the area is larger, if you were to flatten each of these filter paper elements out. BTI say it's a five fold increase, so taking the 88 sq. in. becomes 440 sq. in. not 339.

I don't know how you would compare filter area with foam filters, I guess you would just have to measure air flow.

But I do agree we are all becoming over obsessed with area size now.
I didn't buy my BTI to improve performance but to solve the dust issue, but I would still be surprised if it didn't help a little, most people have said it felt "better", my personal experience is it feels "better" at lower revs, more torquey - I think that's an added bonus if the case but equally wouldn't mind if it wasn't!
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Re: BTI vs FDR Air Intake
  #28 (permalink)  
Old September 5th, 2008, 07:35 AM
guy48065's Avatar
guy48065 guy48065 is online now
 
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Re: BTI vs FDR Air Intake

Quote:
Originally Posted by fanjules View Post
Doesn't that disregard the depth of the pleats though? If the pleats are deeper then the area is larger, if you were to flatten each of these filter paper elements out.
I over simplified. I also didn't try to consider the area lost to the endcaps & glue, area blocked by steel mesh or unusable area due to the tight folds. I have no way to know these things and am just trying to use common sense.

I think if I was a racer I'd get the BTI. The extra surface area of a filter 3X the effective area of the UMP could make a difference in a long dusty race. I would probably fab a mount like the UMP, though, because it looks to be much more solid. One band around the center is probably going to vibrate a lot more than 2 spread out to the ends. That vibration is going to wiggle the boot connection--and eliminating vibration there is supposed to be one of the major features of the BTI (and UMP).
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Re: BTI vs FDR Air Intake
  #29 (permalink)  
Old September 5th, 2008, 08:15 AM
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fanjules fanjules is offline
 
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Re: BTI vs FDR Air Intake

They changed the band on later ones to two, which go either side of the mount. There is a little wiggle when you try to force it... maybe 1/16th of an inch. No way it's going to come loose.
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Re: BTI vs FDR Air Intake
  #30 (permalink)  
Old September 5th, 2008, 08:38 AM
gdog gdog is offline
 
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Re: BTI vs FDR Air Intake

Mega (forum member) tested the UMP on a dyno compared to stock I believe and actually said he loss some power compared to stock(?)
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