perforamnce air intakes worth the $$
In the case of a BFI, it goes from a larger inlet to a smaller outlet. So funnel physics, the same volume of air being pulled in must also exit. Since there is a change in diameter, air speed increases thus shoving the air into the throttle body. It provides more air than what the engine will pull in on it's own. It's not going to be nearly effective as an FI system but it does produce noticeable differences over putting ****ter pipe on your truck.
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So making a three inch(slightly smaller in diameter btw) hour glass configuration, slipped into a custom cai will produce a more desired effect? Well let's get our thinking caps on. I'll try it. Just got to figure out what "it" will be. I assume it will slip in and get caught in the elbow. Thereby not entering the tb. just thinking out loud.
Here we go again 
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It's made by Lance at Airflow Innovations. I'm not sure if you can still order them or not. Last I heard he was pretty backed up on orders. I had minr powdercoated to match the truck. I believe you could get them in either black or silver with your choice of filter color.
Last edited by Got_Hemi44; May 11, 2010 at 07:36 PM.
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From: Ulster County, NY
What the hell are they putting in the water up there in Ulster County, NY? Low end loss is a direct result of BACK PRESSURE which by definition is caused by restriction IN THE EXHAUST SYSTEM! A reduction of air in the intake can not physically effect low end torque in a positive way.
Now I could be wrong if the laws of physics have changed since I learned all this stuff. If so, please enlighten me with some facts.
I actually think Volant's own advertising contradicts ANY benefit of leaving the stock "Hemi hat" on the vehicle:
Volant Air Filter Box: Our Cross-Link polyethylene box is engineered to each specific application for low restriction and an increase in air volume. It insulates and protects the filter from engine heat, moisture, dust and debris to provide colder air to the engine for an increase in horsepower.
Volant Air Duct: Factory air inlet ducts use sound baffles and awkward bends which restrict flow. Our Cross-Link polyethylene air ducts are sculptured to give the engine less restrictive breathing. Incorporating larger diameters and unique bends, that can't be duplicated with metal ducts, allow for maximum airflow velocity and throttle response.
Why would you go through such pains to increase air volume and reduce restriction and leave the most restrictive part on the chain in place? As with ANY other system, it is only going to be as strong as it's weakest link.
Also, a 5-10 HP gain at the rear wheels or 10-15 HP at the crank is fairly significant not to mention the fact that DYNO confirmed data proves that the addition of a CAI increases the gains of other mods such as polished heads and headers.
You've got my curiosity up though, I'd like to see a dyno with JUST removing the Hemi hat. The closest thing to that I've ever personally witnessed was a dyno of a TrueFlow system where their drop in was put in the stock air box and the their tube replaced the Hemi hat AND tube to the air box. The gain on the dyno was just under 7 HP...
Now I could be wrong if the laws of physics have changed since I learned all this stuff. If so, please enlighten me with some facts.
I actually think Volant's own advertising contradicts ANY benefit of leaving the stock "Hemi hat" on the vehicle:
Volant Air Filter Box: Our Cross-Link polyethylene box is engineered to each specific application for low restriction and an increase in air volume. It insulates and protects the filter from engine heat, moisture, dust and debris to provide colder air to the engine for an increase in horsepower.
Volant Air Duct: Factory air inlet ducts use sound baffles and awkward bends which restrict flow. Our Cross-Link polyethylene air ducts are sculptured to give the engine less restrictive breathing. Incorporating larger diameters and unique bends, that can't be duplicated with metal ducts, allow for maximum airflow velocity and throttle response.
Why would you go through such pains to increase air volume and reduce restriction and leave the most restrictive part on the chain in place? As with ANY other system, it is only going to be as strong as it's weakest link.
Also, a 5-10 HP gain at the rear wheels or 10-15 HP at the crank is fairly significant not to mention the fact that DYNO confirmed data proves that the addition of a CAI increases the gains of other mods such as polished heads and headers.
You've got my curiosity up though, I'd like to see a dyno with JUST removing the Hemi hat. The closest thing to that I've ever personally witnessed was a dyno of a TrueFlow system where their drop in was put in the stock air box and the their tube replaced the Hemi hat AND tube to the air box. The gain on the dyno was just under 7 HP...
Volant told me on the phone (and it used to be on their site), that the Hemi hat was well designed, flowed well and removing it lost 12ft lbs of Tq. Is it true ? I have no idea, but they aren't dumb and, like many who make CAI's, probably tested it with and without. Don't ya think ? Where the Tq is lost or any other details I don't know, nor did I claim I knew. The bottom line, Volant makes a nice product and apparently found it better to leave the Hemi hat on. (See pic)
BTW Know anything about 2-strokes ? Ever hear of a boost bottle ? My thinking is that the Hemi hat might act like a Boost bottle. Just a guess.
Back pressure can help lowend, freeing up an exhaust system too much can hurt bottom end power.
I'm a Motorcycle guy, Sportbike enthusiast too and as nasty as some exhaust systems are on bikes, there often are times where OEM exhaust systems aren't that restrictive, just quiet. Minimal gains on some bikes with Aftermarket full systems or replacing just the can/s is common. So like bikes, some car/truck manufacturers put a lot of time and effort in getting max flow, with least amount of noise. The Hemi exhaust is a perfect example. Can gains be made ? Sure, but nothing crazy. The amount of noise that goes up far out weighs the Hp gain with the exhaust systems on the Hemi.
So again, I am only wishing to know whether Volant was wise or unwise, leaving the Hemi hat. I was leaning toward getting theirs if I were to go CAI.
http://answers.yahoo.com/question/in...8215943AAaRcli
Last edited by Fav40; Jul 24, 2011 at 12:36 PM.
I remember seeing a dyno chart and some quarter mile times a while back. They compared the volant against the vararam. One which keeps the hat and one that doesn't. There was little to no difference in dyno numbers between the two and the vararam only ran 2 tenths of a second faster supposedly because of it's functional induction setup.
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I just got off the phone with Daniel from Volant. He said in 2003 Volant made a CAI without the "hat" for the new Hemi. 11ft lbs of Tq was and excessive noise with removing it. On the pick-up cab noise increases quite a bit with the Hemi and removal of the Hat. I personally have never heard one or ridden in one, but certainly don't want too much noise.
Also their exhaust is marginally louder than stock and gains of 9hp can be had. 16hp with their CAI.
Many perceive additional noise as Hp. Often Hp can be found while keeping noise resonable. Volant chooses to try and keep noise levels low.
Thanks for the info, Shiloh 24
Also their exhaust is marginally louder than stock and gains of 9hp can be had. 16hp with their CAI.
Many perceive additional noise as Hp. Often Hp can be found while keeping noise resonable. Volant chooses to try and keep noise levels low.
Thanks for the info, Shiloh 24
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I'm a Motorcycle guy, Sportbike enthusiast too and as nasty as some exhaust systems are on bikes, there often are times where OEM exhaust systems aren't that restrictive, just quiet. Minimal gains on some bikes with Aftermarket full systems or replacing just the can/s is common. So like bikes, some car/truck manufacturers put a lot of time and effort in getting max flow, with least amount of noise. The Hemi exhaust is a perfect example. Can gains be made ? Sure, but nothing crazy. The amount of noise that goes up far out weighs the Hp gain with the exhaust systems on the Hemi.
