Olli Snellman

I have seen this kind of manifold mostly with high HP Audi's here in Finland. This engine produce over 600hp



Similar setups for 951's are on their way.

67King

That looks like a dual plenum intake, which while nice, is not as effective as a variable runner intake. The dual plenum ones are more common, and they have a communication valve that opens and closes and opens again (or is it closes, opens, then closes again?) through the RPM range. I can't think of one I've seen on a 4 banger, but they are pretty common on 6's and 8's, as they are MUCH less expensive than a true dual, or even a variable runner. Ford has used them a good bit, BMW uses them, and if you've noticed the Ferrari V8's with two plenums that have a connecting orifice in the middle, that has a comm valve.

This actually DOES have two sets of runners. Interesting concept on varying the throttle opening. Seems it might work a bit.

WHat no one has shown is a true, variable intake. Dual runners, yes, but not variable. This is a design that I think Cosworth patented a while back. As you can see, and as Chris pointed out - it takes quite a bit to package it:

Everyone geeking out on this stuff, don't mind me, but there is not nearly as much to be gained from this in the 951 as some of you may think. I still think that VCT would be both more beneficial, and less complicated.

Chris White

If you have some time read this thread (one of the best intake threads I know) – its really very interesting and I have to commend the guy making the intake manifold – he did his homework!

Warning! You will get sucked in to reading all 19 pages….there is a really good progression of design. If you just look at the final product you will miss the whole design process!

http://forums.hybridz.org/index.php/.../page__st__320

I apologize in advance for taking up an hour (or more) of your life (it’s worth it)!