This is actually a B16 IM I had it done to. I didn't get a chance to do a before and after, but the plenum has a mirror polish.
http://www.we-todd-did-racing.com/wetoddim...GZkMzF5NTQx.jpg

 

There's lots of power to be made in the intake plenum, otherwise ITB's wouldn't do crap.

 

well duh, your more then doubling the volume being takin into the engine with itbs. i am saying the massaging the factory or a near factory intake mani probably isnt going to make that much of a diff, maybe with the response, but not hp.

 

I'd be interested to see what kind of gains could be had with the full-race intake manifold:
http://www.full-race.com/catalog/product_i...roducts_id=1028

 

There was a big thread about this in s2000 talk. I thought they wernt building it though? I would love to see it built and put down some nice numbers!

 

wow thats one interesting manifold

 

I have a hard time seeing 60...maybe 30 rwhp...
60 is alot for just changing an air plenum....

 

I saw that full race manifold at SEMA, and talked to their guys about it. Its full race's design but its manufactured by some company in australia. It is an amazing piece of work! However, they still havnt fully released it to the public yet because apparently you can only use it if you use their throttle body as well. They told me that with a stock throttle body it wouldnt clear the hood. MSRP on it is $1,650.00.

 

wow. expensive!!!