• Feb 20th 2011 at 2:11PM
  • 25
The flow of technology under the Fiat umbrella typically moves from Ferrari to the other brands. After all, between its road and race car programs, Maranello spends an inordinate amount of time and money on research and development. But it looks like the latest bit of technology in Italy is about to go the other way.

Rumor has it that Ferrari is working on a high-performance version of Fiat's acclaimed MultiAir system - one of the biggest assets that Fiat brought to the Chrysler deal. The system allows for an infinitely variable valvetrain setup altered on the fly through hydraulic actuators to optimize performance and efficiency. According to industry speculation on the reportedly leaked schematic above, Ferrari's system could also incorporate the type of pneumatically-actuated valve control used by the Scuderia to allow its F1 engines to redline over the 20,000 RPM mark, far beyond what a conventional spring-driven system could allow.

Combined, the systems could stand to simultaneously improve the efficiency and the output of Ferrari's already high-revving powertrains.

[Source: autoblog.nl via MotorAuthority]

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    • 1 Second Ago
      • 4 Years Ago
      20,000 RPMs ? thats astronomical...
        • 4 Years Ago
        and it isn't happening.
        For a production engine, the mean piston speed usually 'redlines' at 25m/s
        So, 10,000 isn't happening [LFA is the closest], let alone 20K
      • 4 Years Ago
      We are waiting :)
        • 4 Years Ago
        Multiair only gives c.10% better economy, but it does include slightly more power with the economy, and lower emissions. The US engines WILL get it, but I'd reckon on 2012, not this year.
        • 4 Years Ago
        Seriously. The Multiair system is one of the biggest things Fiat's got. I would argue it'll be as significant if not more so than Ford's Ecoboost, but see, that's only when they finally start bringing it into multiple production models.

        I'm hoping they release Multiair for Caliber/Compass/Patriot/Avenger/200 this year on the World Engine models. These vehicles could be far more efficient than they are right now. The only question is whether they'd do that when the models are about to end production. (I, personally, argue that they should, bolting Multiair onto the WGE motors sounds like it wouldn't be difficult and wouldn't eat up engineering time. And I know I'd buy a FDII Patriot with 20-25% better fuel economy, I estimate that would be around 25-26 mpg, which is fantastic. But I guess the improvements on the vehicles might not be enough to justify it. We'll just have to see, I guess).
      • 4 Years Ago
      The reason for the peg down in revs was down to new rules. The reason for the rule was to reduce costs and redirect things towards a road car R and D relevancy path e.g. KERS. Obviously, there was the rule which mandated that the engines should last for a series of races which would probably have an impact on the red line.
      • 4 Years Ago
      I'd like to see Multiair applied to the Chrysler Hemi. Just my half baked rough calculations are enough to make you drool.

      5.7 Hemi V8 - 451hp
      6.4 Hemi V8 - 545hp
      7.0 Hemi V8 - 592hp (The crate engine based on the new hemi architecture)

      ...and, since we're dreaming, why not imagine a Viper V10 engine based on the 6.4 with Multiair.

      8.0 Hemi V10 - 681hp

      That, is simply amazing. Even a 2.5 liter Hemi four banger would pump out an impressive 200hp. Not bad at all.

      I am aware that the Multiair system is probably not easily applicable to an overhead valve system like the Hemi, but we can dream can't we?
        • 4 Years Ago
        Unfortunately, there are currently no plans for a Hemi with Multi-air. However, there are plans for a twin-turbocharged 420 horsepower multi-air 3.0L Pentastar V6 that competes directly with Ford's EcoBoost.
        • 4 Years Ago
        Without VTEC camshaft profile switching, that engine would be lucky to make 180hp. (and that 240hp was the old rating system)
        • 4 Years Ago
        It would sound impressive until you consider that Honda manage to get well over 200hp out a 2.0L, 4 cylinder.
        • 4 Years Ago
        Yes, just like the 2.0 L 4 banger Honda came out with 12 years ago, with 240 HP. Without multi air.
      • 4 Years Ago
      Please don't start with Italian reliability jokes, they're old. Thank you.
      • 4 Years Ago
      Apparently multi air increases hp 10 % and torque 15 %. with an increase (unspecified)
      of mpg
      sounds good to me .
      • 4 Years Ago
      If Ferrari move to pneumatic valves, it will be purely for window dressing. It definitely allows for some trick engine management, but unless it is significantly more reliable than a spring system, the average driver won't be able to tell the difference.
        • 4 Years Ago
        And since Ferrari doesn't make a single car that revs that high, your point is?
        • 4 Years Ago
        If your powerband is above 14,000 rpm, you will notice a difference.
      • 4 Years Ago
      I hadn't realized exactly what MultiAir actually was until recently... I simply thought it was a fancy variable valve tech a la VTEC.

      I have been saying for years now that hydraulically actuated valves are one of the holy-grails in ICE design, but I honestly didn't realize that there were any production cars with it already. Huge props for Fiat for bringing this out and I think we're only at the tip of the iceberg in terms of what it will be able to do... if Ferrari gets a version of it, we are going to see some sick performance in the years to come.

      MultiAir is going to be one of those rare technologies that extends the life of the ICE.
        • 4 Years Ago
        MultiAir isn't hydraulically actuated valves in the traditional sense. The cams still open the valves, MultiAir just allows this to be thwarted, so the valve doesn't open.

        It's not really as versatile as the idea of a hydraulically (or solenoid) actuated system would imply, it is still limited in most ways by the cam profile and the ability of the spring return to close the valve.
      • 4 Years Ago
      The best thing about this is if they can do away with valve float and all of the difficulty with having to have a cam profile they can adjust the engine on the fly to produce a very wide torque curve and and adjustable horsepower curve based on driver input. no need for a throttle body either think about it. If the driver just decides to gently go about town then the engine pulls timing and adjusts the profile for either slower valve opening at low rpm or maybe just less duration of opening (not sure what system but both would work). Driver decides to go quick and computer adjust valves to open max duration and time at all rpm and with no need to wait for mechanical springs to push valves back it could be very high rpm. This actually should have been made long ago but my guess is the electronics couldent keep up back then.
      • 4 Years Ago
      It looks like Chrysler will benefit greatly from this technology and help boost performance and economy on a whole group of its already outstanding engines. I've heard Multiair doesn't do much for the Pentastar V-6, but does wonders for the World Engine V-6. Rumored that Chrysler will add a variety of displacements along with single and dual turbos to the Pentastar and produce increadible V-6 power for future Chryslers. Imagine Multiair applied to the HEMI. OH MY!!!!!
      • 4 Years Ago
      Quote: "Ferrari's system could also incorporate the type of pneumatically-actuated valve control used by the Scuderia to allow its F1 engines to redline over the 20,000 RPM mark, far beyond what a conventional spring-driven system could allow."

      About 45- 50 years ago Honda made DOHC 4valve per cylinder, 2cyl. 50cc, 5cyl 125cc and 6cyl. 250 and 350 cc. The 125cc 20 valve 5 cylinder could rev close to 25000 rpm with valve springs. I think the "idle" was about 12-13000 rpm. Well that was pure race machines you may say. So is F1.

      To put it in perspective, some 20 years ago Honda sold 250cc street bike with 4cyl that red-lined at 19000 rpm. A mass produced street bike!
        • 4 Years Ago
        What exactly was the bore/stroke of a 250cc inline4? 48.5mm bore x 33.8mm stroke.
        Power: 45hp@15,000, Torque:16 ft-lbs@12,000
        Fine for a motorcycle, where you operate above 10,000rpm
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