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Flipping Air Fillter Cover...

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by bigblue, May 31, 2001.

  1. bigblue

    bigblue 1/2 ton status

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    I went to the Autozone to test my alternator and the guy suggested that I flip my Air Filter Upside down to get some better gas mileage. Well I did it and It sounds like a Racecar now. I kinda like it:) I have a K and N too.

    [image]http://a580.g.akamai.net/7/580/2855/b930c359d37700/www.swell.com/travel/surfmaps/us/florida_south/images/hill_pumphouse_i.jpg[/image]
     
  2. CaptCrunch

    CaptCrunch 1/2 ton status

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    Hahaa... The ole "Mexican Turbo" Ehh... No good in hot weather... I like my cold air induction.... [​IMG]

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <A target="_blank" HREF=http://www.geocities.com/milnerlives_2000/blazer.htm>http://www.geocities.com/milnerlives_2000/blazer.htm</A>
     
  3. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Your loosing power and economy over the factory snorkle in the grill. Sucking all that hot air under the hood is a bad thing. The only time that would be an improvement is if you have a old truck (69-77) with the very restrictive air cleaner that was pulling under hood air. You would still have more gains by going to a 78 up air cleaner in snorkle.

    Diging it in the dirt with my K5's
    Grim-Reaper
    <A target="_blank" HREF=http://grimsk5s.coloradok5.com/>http://grimsk5s.coloradok5.com/</A>
     
  4. ftn96

    ftn96 1/2 ton status

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    LMFAO!!!! " Mexican Turbo" [​IMG]

    Steve Fox for President, 2004.
    Jimi Hendrix was re-incarnated in 1990 as my....JIMI
     
  5. ftn96

    ftn96 1/2 ton status

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    the only wya that "might" help is if you were running a hood scoop to get some "cool" air in there. Like grimmy said, your suckign all that hot air in there. Yep, it sure does sound better.

    Steve Fox for President, 2004.
    Jimi Hendrix was re-incarnated in 1990 as my....JIMI
     
  6. bigblue

    bigblue 1/2 ton status

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    Really, Well I am in San Diego where it is 65 year round so I will drive around like this for a while then Put it back...I love the sound...

    LMFAO!!!! too " Mexican Turbo"
    [image]http://a580.g.akamai.net/7/580/2855/b930c359d37700/www.swell.com/travel/surfmaps/us/florida_south/images/hill_pumphouse_i.jpg[/image]<P ID="edit"><FONT SIZE=-1>Edited by bigblue on 05/31/01 12:25 PM (server time).</FONT></P>
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    If you put a dual snorkel air cleaner on there (make one) you will hear that sound as well. Just means yourmotor is getting enough air : )

    Dorian
    My tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
    No anti-theft measures on your truck? No pity when its stolen
     
  8. 90K5

    90K5 1/2 ton status

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    I flipped mine again the other day, it does soud awesome, and may be a little faster...the way I see it, with the snorkel still hooked up, and the lid flipped, it still sucks outside air, plus air from under the hood, so it seems like it would be better, even if the additional air is hotter. Just my $.02

    90K5

    See my truck at <A target="_blank" HREF=http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502>http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502</A>
     
  9. dyeager535

    dyeager535 1 ton status Premium Member

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    Would be nice if we had a K5 dyno we could test this stuff on : ) Its already commonly known that hot air hurts power immensely (something like 100 degrees=30% power loss) but no one really knows which is worse/better: the relatively small amount of cold air you get from the stock setup, or the large amounts of hot air you get from flipping the lid.

    I'd be willing to bet leaving the lid flipped but snorkel hooked up would be pretty ineffective, there would be no vacuum at the snorkel anymore, so the only advantage would be while moving, and even then slight, since the "ram air" effect would be negated by the snorkel tube cover on the core support.

    That 100 degree difference may sound like a lot, (as in no way you could get it down that much) but a guy on the Monte list actually monitored underhood temps with/without cold air induction, and it was somewhere around 50-80 degrees with cold air induction...I've still got the emails, I believe he said his typical underhood temp (so that would be hot air) was around 150 degrees.



    Dorian
    My tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
    No anti-theft measures on your truck? No pity when its stolen
     
  10. ftn96

    ftn96 1/2 ton status

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    Just get a HUGE high Rise intake cut a huge whole in the hood and have the breathers sticking out of the hood. That should do the trick.[​IMG]

    Steve Fox for President, 2004.
    Jimi Hendrix was re-incarnated in 1990 as my....JIMI
     
  11. ftn96

    ftn96 1/2 ton status

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    PS, dont forget the bug shield. Them bugs will clog the filter really quick.[​IMG]

    Steve Fox for President, 2004.
    Jimi Hendrix was re-incarnated in 1990 as my....JIMI
     
  12. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    I am for flipping the lid. Definately better at high speed/high RPM on my truck. Cooler air cuz of larger volume flowing due to speed...? I don't know.
    Always forget to re-flip for my smog inspections. Get the nasty looks. :)
     
  13. Storm Trooper

    Storm Trooper 1/2 ton status GMOTM Winner

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    If you can keep it around 100mph the air will be cool (wind chill factor).[​IMG]

    [​IMG]<font color=red>[/b]"Rid'in HigH in my K5"[​IMG]
    ....[​IMG]<font color=blue>[/b]"6" Lift -<font color=purple>38.5's"[​IMG]....
     
  14. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    Yup, with my current gears and tires I shift into OD about 85 and pedal to the metal!
    My tranny has gotta be smoked!
    Dave
     
  15. 90K5

    90K5 1/2 ton status

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    Just flip it and decide for yourself. thats what i did when I heard about it.

    90K5

    See my truck at <A target="_blank" HREF=http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502>http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502</A>
     
  16. DMK

    DMK 1/2 ton status

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    If it really hurts performance why did 95% of all muscle cars and hi po cars of the 60's come with open element air cleaners? The main reason for the closed is emissions.
    Cold air induction does add power. An article I read said you are better off having the extra air hot or cold.
     
  17. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Well I am also on a Supra list and one of the guys that had more money than he knew what to do with did do a Dyno test on intakes. Now the car was a 350rwhp Intercooled Turbo Supra. What he tested was the stock drop in K&N and the FIPK (them huge cone filters the rice boys use). He was very scientic in his approach and did everything he could to make the test fair. The Dyno he was at had some high flow fans that they pointed at the front etc. The ONLY thing that changed was the stock air box used and not used. All basics of the test were kept even and before each run he drove the car on a 2-3 mile loop to try to keep the operating temp the same.
    The stock drop in pulls it's air from in front of the core support behind the head passenger side head light. So clean cool air. He did 3 pulls hood closed fans blowing directly into the grill and under the car to try to simulate the car going down the road.
    He then installed FIPK kit. This removes the stock box and puts the big cone on the front of the Air flow meter. It mounts right where the stock box would be so the opening in the corsuport is right in front of it. Got it hot by driving it down the street put it on the Dyno and did 3 hood closed pulls.
    LOST 6RWHP with the high flow filter and under hood air. Now 6 RWHP may not seem huge but understand this car has a intercooler, our trucks don't. It drops 10-30 deg in the intercooler depending on the temp and humidity. it was also a rwhp (rear Wheel HP) figure. Roller dyno's your going though your drive train loss so were about 8 crank hp.
    That one Dyno test that he documented changed a lot of things on the way the SUpra guys do things. Those that kept the FIPK that were really into it boxed off the air cleaner are to keep the hot air out. they then went to extreme mesures to get cold air in to that filter.

    Diging it in the dirt with my K5's
    Grim-Reaper
    <A target="_blank" HREF=http://grimsk5s.coloradok5.com/>http://grimsk5s.coloradok5.com/</A>
     
  18. blazerbum

    blazerbum Registered Member

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    cool im not the only one who noticed a difference i didnt think i was halusinating but never know i flipped mine on my 73 and there was a diff stock air cleaner someone took my k&n at work in the parking lot .
     
  19. jarheadk5

    jarheadk5 1/2 ton status

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    In my personal, totally un-scientific testing (stopwatch from 30 to 60 on the same stretch of highway), the flipped air filter lid was faster by 1-2 seconds. This tells me the factory single-snorkel just isn't flowing enough air for my motor (stock 305). Solution - dual-snorkel air filter housing that I'm going to make, with the tall lid so I can use the tall filter.

    Now this is what happened on my truck. I know that cold air makes more power, but evidently plenty of hot air is better than not enough cold air.

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  20. dyeager535

    dyeager535 1 ton status Premium Member

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    Why did they not use roller cams? Why were they wasting time with leaf spring rear axles in cars that were capable of doing 13 second 1/4 miles when coil spring rear ends were much better suited? Cause they didn't know any better. Actually, they did, and they learned. Thats why cowl induction and ram air induction was used. (and is once again popular) The benefits of cold air have been known for a long time, but it wasn't cool/practical (looks, cost, design) to run that setup on all cars.

    Emissions are part of it (containing evaporating fuel) but also for noise reduction. Many vehicles came/come with "restrictive" intake setups because of the noise. Trying to make the vehicle quieter to the occupants.

    If anyone thinks that much air gets blown around underneath the hood, you are mistaken. You have a big brick flying down the highway, with nothing but a semi-open space underneath for air to enter, and the radiator. Not only that, once it enters, it is not easy for it to leave, what with the firewall in the way.

    Dorian
    My tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
    No anti-theft measures on your truck? No pity when its stolen
     

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