Air cleaner/no air cleaner? - Page 2 - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #16 of 23 (permalink) Old 06-21-2012, 08:32 PM
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Re: Air cleaner/no air cleaner?

In 20-something years I have been racing the Maverick, I've not once ever had and air filter that DIDN'T cost some ET or MPH. K&N, Moroso, circle track stuff, home made, they all cost some power. Still not running a filter on it. Hood was sealed directly to the top of the throttle body, however someone lost my scoop tray and i'm now running a throttle body just out in the open. And it runs exactly the same as sealed to the hood. Ran a carb the same way until I found that injection blows the carb right out of the water in EVERY aspect. Never once had an engine even show a hint of failure due to dirt/debris entry. Take that back...had a screw back out of a throttle shaft about 15 years ago and luckily I heard it rattling around the top of the engine after I shut down on a 9.90 pass. Killed the motor and saw the screw missing after I got back to the pit, pulled the head, removed screw from the top of the piston, new gaskets, back into the next round and won the entire event. An air filter would not have stopped that from happening.

Perhaps I'm lucky?? But walking around the drag strip, I haven't seen too many race cars with air filters. Some of the drasters are running a filter in the scoop tray but they're just paranoid that their $50,000 store bought big blocks are going to eat a bumble bee; and quite frankly I probably would be too if I had to spend some coin on a motor.

Circle track cars, road race cars, and street cars should ALL have a filter though. And not EVERY drag strip is "well taken care of". Local tracks here aren't too bad. Would be even better if the racers would volunteer a little more.

GET OUT & VOTE THIS NOVEMBER!!
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post #17 of 23 (permalink) Old 06-24-2012, 05:14 PM Thread Starter
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Re: Air cleaner/no air cleaner?

Most of the race cars at my track run open too. The street cars and particularly the computer/injected ones generally have an air filter. Some of the street people also pull their air cleaner if they are carb'd. I guess I'm sort of back on the fence on this. I do think what I have might work a bit better if I leave the air cleaner base and filter on and remove the top.

1965 289 mustang fastback
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post #18 of 23 (permalink) Old 06-25-2012, 12:19 PM
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Re: Air cleaner/no air cleaner?

Well, I'd say if you don't want to run a filter, at least run the base and lid with a stud spacer to get the airflow smoothed and guided. Even a crappy stock one is better than nothing for flow guidance - but use the lid too or the air just collides above the carb. Or a short stack. Lots of local racers don't use decent trans coolers or plug wire looms either - but I wouldn't do the same just because they don't. Hey - it's a simple test. Try it and trash it or keep it.

David

In days of yore (late '70s), we used the single-4 Hemi bases as our "turkey pans" for the smooth flow entry. Compared to a flat pan, on the Boss's '66 Chevy II inline 6-cylinder Super Stock car, it cut the better part of a tenth from the ET - IIRC 10.60/10.62 to mid 10.50s:

-=≡ If it was easy everyone would do it ≡=-
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post #19 of 23 (permalink) Old 06-28-2012, 05:03 PM Thread Starter
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Re: Air cleaner/no air cleaner?

I like the Nascar config but it is not really something I can practically do on my car.

I will figger sumpem out, LOL.

1965 289 mustang fastback
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post #20 of 23 (permalink) Old 06-28-2012, 10:25 PM
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Re: Air cleaner/no air cleaner?

I use a Velocity-Stack on Top of my 700DP...

In combination to a functional Cobra Jet Scoop on Top of my Hood.
With 1" Spacer under the Carb, the Stack is looking out of the Hood just about 1/2"....and 3/4" under the scoop...so perfectly IN THE FRESH AIR Area

Cold Air is the Key to Performance, so this Setup is better than this round type filters in my opinion...



The raw Filter in the Stack is removed when racing....

Regards
Mark

69 Cougar,mod. 351W, T5z, 3.91 incl. Spool. MT ET Rad.
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post #21 of 23 (permalink) Old 06-30-2012, 03:51 PM
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Re: Air cleaner/no air cleaner?

I always take the air cleaner off when making a pass. The couple of times I've left it on the run was slower. I believe Braswell or BLP just came out wig a new air cleaner assembly that sits pretty low judging by the pictures and is supposed to pick up a few horsepower. Might be a little pricey though.

65 mustang fstbk, pump gas street friendly Camshaft Innovations cammed .060 over 289, face plated T5. 11.12 at 122 mph and 1.53 60 ft all motor.
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post #22 of 23 (permalink) Old 07-08-2012, 06:32 PM
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Re: Air cleaner/no air cleaner?

Hot Rod mag. did a dyno test in Aug.04 issue. Their final best result was obtained with a K&N Stubstack and a flat filter base, the tallest filter you can fit under your hood and a K&N Xsteme lid. This is in comparison to running no filter at all.
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post #23 of 23 (permalink) Old 07-13-2012, 07:58 PM
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Re: Air cleaner/no air cleaner?

And hot rod (and most other magazines and e-zines) are compensated for the testing by whoever the manufacturer of the "winner" of the comparison.

Having tested tons of stuff (tens of thousands of $$$ worth of different things) for over 20 years, Hot Rod, Car Craft, PM, etc...they're not always accurate in their results; and they're also not always thorough in their testing.

The only way to know is to try it yourself. EVERY engine/chassis/body type/shape/combination is different. Yours might like a Marine flame arrestor. It might like nothing at all. It might like a substack or it might like a big K&N with a K&N lid. Just have to try it.

It's unfortunate that our economic situation (speaking for myself here) had halted most any "testing" that I normally do this time of year. Sucks but looks like we're going to get at least 4 more years of it. I haven't been to the races since last October. Would like to but just can't spend on stuff that isn't necessary.

GET OUT & VOTE THIS NOVEMBER!!
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