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Re: Air filters on race cars??
[Re: DemonDust]
#1715068
12/24/14 10:12 PM
12/24/14 10:12 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Simply put, if you wanna run an air filter, find the biggest one that will fit your application. If your car runs better with one, you have turbulence / A/F mixture issues or the carb is too big - all of which should be corrected by other means than installing an air filter. No matter how you cut it, an air filter is a restriction.
Fastest 300
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Re: Air filters on race cars??
[Re: D-50]
#1715071
12/24/14 11:19 PM
12/24/14 11:19 PM
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Joined: Dec 2006
Posts: 4,647
aotearoa
rebel
master
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master
Joined: Dec 2006
Posts: 4,647
aotearoa
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our track unfortunately has some stones lifting off the seal on the return road & after seeing 1 racer get a stone flick up from their front wheel & lodge itself into carbs butterflies, i would never ever run without some kind of filtration on my carb. the car with the stone in the butterflies took off with front brakes locked on & plowed into another racecar before the owner could shut it off. not a happy day for 2 racers that day. i'm using Frams Airhogg air cleaner. it's pretty good, virtualy no difference with it on or off, but i now leave it on.
Last edited by rebel; 12/24/14 11:23 PM.
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Re: Air filters on race cars??
[Re: sixpackgut]
#1715075
12/25/14 01:48 AM
12/25/14 01:48 AM
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Joined: Jan 2003
Posts: 9,986
Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,986
Frostbitefalls MN (Rocky&Bullw...
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The K & N web site has the formula for square inches of filter to hp for no loss. If I recall it is 7 hp for each square inch of filter using the K&N type. I bought a 6 x 14 for next year. I learned the hard way it is impossible for the most part to aviod getting some dirt in the motor. When I saw the dirt film in the throttle body that did it for me.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Air filters on race cars??
[Re: Crizila]
#1715079
12/25/14 11:51 AM
12/25/14 11:51 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
our track unfortunately has some stones lifting off the seal on the return road & after seeing 1 racer get a stone flick up from their front wheel & lodge itself into carbs butterflies, i would never ever run without some kind of filtration on my carb. the car with the stone in the butterflies took off with front brakes locked on & plowed into another racecar before the owner could shut it off. not a happy day for 2 racers that day. i'm using Frams Airhogg air cleaner. it's pretty good, virtualy no difference with it on or off, but i now leave it on.
and if you are going to use a "conventional" round style air filter, get one with a breathable top. Just that much more area that is seldom used.
I found the top lid causes issues on flow... you get
2 different air paths that crash into each other
and in the end you get less into the carb... I also
see that its worse if you have a drop base because
the air is going up first then has to turn down to
get into the carb.. but the side air is plowing into
the lid air ... on the track I dont run a air cleaner
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Re: Air filters on race cars??
[Re: camastomcat]
#1715081
12/25/14 12:47 PM
12/25/14 12:47 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
I wouldn't run without one. Rocks and sand are a killer. Big K&N under the scoop.
I was gonna try to make a lite filter for the inlet
of my scoop but never got around to it.. I cant put
one in the scoop... but basically it would stop sticks
and rocks
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Re: Air filters on race cars??
[Re: mopar dave]
#1715083
12/25/14 01:15 PM
12/25/14 01:15 PM
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Joined: Jul 2007
Posts: 1,682
Philadelphia
radar
top fuel
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top fuel
Joined: Jul 2007
Posts: 1,682
Philadelphia
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I remember a few years ago this came up and everybody was talking about how they use one of those filters that looks like a flat box with a wedge in the front all the air came in the top/front. Don't remember the name. I remember looking them up since I was looking for a better option under my 340 scoop. Too much $$ for my street effort.
Edit: looked it up on google image- 'UNI' filter
Last edited by radar; 12/25/14 03:20 PM.
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Re: Air filters on race cars??
[Re: mopar dave]
#1715084
12/25/14 01:16 PM
12/25/14 01:16 PM
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Joined: Feb 2008
Posts: 714
Central TEXAS!!!!
sr4440
super stock
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super stock
Joined: Feb 2008
Posts: 714
Central TEXAS!!!!
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Had a big block chevy on the dyno, tuned it for max power, THEN the owner mentions he runs an air cleaner and it’s in the truck. We put it on and the engine loss 26 HP, then lean the carb back down and gained 28 HP.
Joe
Without Data, you’re just another guy with an opinion.
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Years ago I dyno tested two different K&N Extreme filter tops on two different 14 inch diameter air cleaners on two different dynos, both times the motors loss right at 8 HP 
I did a similar test at the track A,B,A test on the one of the same lids on a 14 inch K&N aircleaner on a 1050 Holley Dominator carb and the stupid dang car went a little quicker ET (.03 to .04)and faster (.3 and .25MPH) with the lid on, two times 
IHTHs 
