Ram Air System Idea

[matthew]

I was looking at some of the ram air stuff at www.ramairbox.com/parts.html (http://www.ramairbox.com/parts.html) and started thinking (not a good thing a 4:00 in the morning) would it work to take 2 of the 4x11 air horns and mount them in the air dam under the bumper. route 2 pieces of 4" flex pipe up to the air clearner. Take 2 of the 3x8 air horns, cut them into a convex shape, and mount them to the sides of the air clearner, cut off the old cold air hook up for one side, and have a ram air system????? I'm not shure if there is enough room for the 4" tube or if it would even help the gas guzzelers. kind of like this www.ramairss.com/install.html (http://www.ramairss.com/install.html) but run from the sides w/out the inline filter. What yall think? Just thought of something, wouldn't work to well going through a creek!

[OBX-AUTOMOTIVE]

THAT IS JUST ABOUT HOW MY....... 66 442 RAM AIR WAS MOUNTED......IN THE SLOTS OF THE BUMPER......WORKED GOOD......... ...SAY MATTHEW.................. ARE YOU VOTING FOR RIVER BEAST??? .....GARY smile.gif smile.gif

[matthew]

You bet, he's got my vote!!!

[graham]

matthew, I've been toying with a similar idea. This involves using the AirCon to provide air to the carby. Colder/denser air should provide more power and economy. Similar to the Intercooled system used on some Turbo deisols. The bit I'm not sure of is if the AirCon will provide enough air? and any other probs that may effect to motor?

[EZ]

I would think in an off road GW you would want your intakes as high as you could get them. with the main benefit being a cooler air source from out side of the engine area.
I Know my motorcycle does not benefit from it's ram air pressure until 140+ mph and it's only 7 HP.
as far as using the ac system for cooling as a guess you will use more HP than you will get, but I'm not sure about that one.
If you had a good ac sys you could pull your intake air from the cab maybe or possibly make a little heat exchanger for the fuel and place it next to the evaporator core, of course if it leaks :(

[trssho]

I was thinking about using a set up like the one in this link. This way, the air cleaner and assembly won't be in the hot engine compartment. The diameter of the throttle body assy dodge V8 is the same as my edelbrock 4 bbl, the only problem is its not deep enough to fit on the carb casting. I think they make risers that could make it work however.

http://jeepconnection.com/parts/pic/air.png

[Ralph]

I would think that these dual-inlet assemblies have limited benefit over the original assembly, even though the original doesn't meet moving air head-on (the opening is behind the headlight support). Seems a lot of folks just discard the hose, so their engine can draw hot air from directly over the exhaust manifold. Or they use aftermarket air cleaner housings that draw air in from 360 degrees of well-heated engine!

http://fs3.dotphoto.com/MemberImages/180113/i4EC0C3F5-3730-4A91-8673-D0511D7B4999.jpg

[ August 12, 2001: Message edited by: Ralph ]

[Narnian]

Ram-air would be of little to no value on your Jeep, unless you plan to do drag racing. I have a ram-air system on my Vette. The system on my Vette has a large air scoop down low on the road. The normal Vette intake does not grab cool air, but grabs air from the engine compartment. The air scoop on the vette is about 2 feet wide and 6 inches tall. The system in the picture you have looks like it is 5 inches wide 2 inches tall. It does not have a big enough scoop to qualify. It is simply a cold air induction system that points forward. The original ram-air system (Pontiac TA - 1973?) had dual scoops, each measured roughly 12 inches by 2.

Ram-air only works when you create enough pressure in front of the scoop to force more air through the intake than it is designed to inhale normally accept. Essentially creating a low pressure supercharger. For off road, you will never get going fast enough to create that air pressure. The best off-road set up would be the stock setup (which draws cool air in from outside the engine compartment) or a snorkel, which does the same thing but grabs it from a higher location.

On my Vette, the Ram air did improve highmay mileage. But it was very minimal and definately subjective. After many trips I calculated getting a 0.25 MPG increase. That's not bad, but keep in mind my Vette already gets 24 to 30 mpg.

Despite all the claims the racing manufacturers claim, Ram-air only helps a little. You get more from the cool air intake than the ram air itself. It is some very misleading marketing. There are also other variables involved. Ram Air (and cool air induction) will provide a percentage type of increase. In other words, if you are producing 100 hp, the system might add 1 hp, on a 300 HP machine it might add 3 hp. So the company that makes the system hooks it up to a 600 HP racing engine, and then claims it adds 20 HP.

On my Jeep I actually have the set-up Ralph mentioned - an aftermarket air cleaner housing that draws air in from 360 degrees of a well-heated engine. This is a bonus in the winter, but works against you in the summer when you want cooler air going in. I am working on repairing the stock setup with the hose to the grill. I intend to put that on during the summer and put the 360 intake on during the winter.

The Ram air would be OK on your Jeep if most of your driving is on the highway. But I don't think it's worth your time or effort to invent or create. For bopping around town and driving through the woods it would be a lot of work for no gain.

[trssho]

I dont the think we are looking at ram air, but rather, cold air induction. The Jeep would most definitely not benifet from ram air, but cold air is something these and all engines like. Also, I wonder if the carb would benifet from more air intake then the factory horn allows. I doubt it, but wouldnt hurt.

[OBX-AUTOMOTIVE]

MATTHEW...AFTER READING ALL THE REPLYS............. I REMEMBERED SOMETHING WE DID IN THE 60s..... TO KEEP HOT AIR MOVING OUT OF THE ENGINE COMPARTMENT,WE WOULD PUT SHIMS IN THE HOOD,AT THE REAR BOLT ON EACH SIDE OF THE HINGES...WHEN YOU CLOSED THE HOOD ,THE REAR OF THE HOOD WOULD BE ABOUT 1" ABOVE THE COWL...... IT WORKED GOOD...IT MOVED THE HOT AIR OUT...NOT ONLY WAS YOUR CAR ON A RAKE..... BUT YOUR HOOD WAS TOO :cool: :cool: .... .....GARY ;) ;)

[Ralph]

And the too-cool types put louvers in the top of the hood. Also, as with Corvettes and TransAms, you can add side vents that will allow air to pass over the engine and out the sides.

[Yaz]

<BLOCKQUOTE>quote:</font><HR>Originally posted by GEMOBX/77/401:
MATTHEW...AFTER READING ALL THE REPLYS............. I REMEMBERED SOMETHING WE DID IN THE 60s..... TO KEEP HOT AIR MOVING OUT OF THE ENGINE COMPARTMENT,WE WOULD PUT SHIMS IN THE HOOD,AT THE REAR BOLT ON EACH SIDE OF THE HINGES...WHEN YOU CLOSED THE HOOD ,THE REAR OF THE HOOD WOULD BE ABOUT 1" ABOVE THE COWL...... IT WORKED GOOD...IT MOVED THE HOT AIR OUT...NOT ONLY WAS YOUR CAR ON A RAKE..... BUT YOUR HOOD WAS TOO :cool: :cool: .... .....GARY ;) ;)<HR></BLOCKQUOTE>

basically you mean this: http://www.usbody.com/images/FCJ-68S.gif

http://www.usbody.com/cherokee%20page.htm

[matthew]

I would think for highway driving this would help out considerably. With two 4x11 inch scoops you would have a total of 88 square inches of surface area catching air at 70 mph running through two 4” pipes and cramming it into the carb. I agree for around town and 4 wheeling it would not do much at all but for the highway, well just a thought.

[OBX-AUTOMOTIVE]

JOHN THAT'S NICE NOW! .BUT I'M TALKING EARLY "1960s" WHEN YOU MADE ENGINE SWAPS LIKE CHANGING SOCKS...MY FRIEND HAD A 57 FORD WITH A BUICK IN IT...WHAT A COMBO!!!AND STP STICKERS ON YOUR QUARTER GLASS...5 MORE HP.. smile.gif . ....GARY

[Slippery]

<BLOCKQUOTE>quote:</font><HR>Originally posted by Ralph:
And the too-cool types put louvers in the top of the hood. Also, as with Corvettes and TransAms, you can add side vents that will allow air to pass over the engine and out the sides.<HR></BLOCKQUOTE>

I was thinking along those lines (scary, eh?); Chrysler LeBaron/Dodge Lancer Turbo louvers on the hood (it's a louvered panel with a nozzle on the underside to direct cold air onto the turbo housing), and T/A front-fender air extractors...hmmm...

[ August 13, 2001: Message edited by: Slippery ]