Thread: If you could make your own intake manifold

Manifold looks good. Just like mine but ofcourse my runner are longer.
What size runner id are you using. And what size id are the stacks?

factory is dual 57mm with a 4" inlet, about like having two factory lowport throttle bodies, one for two cylinders. Then if I ever want to upgrade someday I can slap a single butterfly billet piece on there.



1.875" ID on runners and the v-stacks are really close to that, they're just a hair bigger in the throat but I ported the runners a little to make up for it. The top of the v-stacks are 75mm.

How much longer are your runners?

I'm using the same plenum along with 57mm runners tapering down to ve flange. The stacks protrude 1.25in inside the plenum, for a total lenght of 7in from head to top of the stack.

mine are right at 5 3/4" in total length and protrude about an inch.

i really like this intake manifold

longer runners
basically looks like a billet runner made to suit a greddy plenum camber
if any one knows where i can get the billet half please let me know
only issue i have is that the ve intake ports are bigger then the port runners which im worried might make it restrictive
but would still like to test it out and see the results

Wow, now that looks OEM fresh right there. Very cool.

I like it!!
Who makes it?

That is pretty trick looking. The runners are definitely machined on a 5 axis machine. We have something kinda close to that made for over 3 yrs now for the RWD hi-port S13 SR20DET head but just not as long runners.

^^ That looks just like the manifold that was on that bonkers B15 ashton posted several days ago!!

I've been watching some Group B rally, and they have intake manifolds I've always thought would be amazing, but would never really fit in a stock engine bay in a million years. They would also be extremely expensive to make. I'm not sure if the design is actually good or not though, as we've learned many things related to performance and turbo performance since then. It reminds me of the Ferrari exhaust headers from the 60's. They seem like they'd perform amazingly, but now that we know a lot more about cylinder scavenging, they look like they must flow pretty poorly by today's standards.

I am not referring to these style manifolds:
http://www.bufkinengineering.com/Quattro_Moteur_20V.jpg
http://bufkinengineering.com/DSCF0018.jpg
http://farm1.static.flickr.com/27/63923804_7fbaf93cc5.jpg
http://i111.photobucket.com/albums/n140/DKCHRIS86/IMG_0192.jpg

Nor am I talking about this style:
http://grassrootsmotorsports.com/media/img/readerrides/updates/IMGP0665.JPG

I will see if I can find a pic of an example.