Dutch944

He made the intake for the RP968 as well.. Real class work!

https://scontent-ams3-1.xx.fbcdn.net...2b&oe=5734999E

333pg333

Yes, most definitely!

Duke

I designed a 16v intake along with fuel rail etc. Not as fancy as a fully CNC-machined intake but with great care taken to the dimension of the full radius bellmounths, runner length etc to maximize power. I'd say it's race proven with 672 rwhp at 1.5 bar

We had several made, I have one left for sale.

333pg333

Results speak for themselves. You have an esteemed admirer for this. :-)

V2Rocket

Duke,
nice piece!
Do you know if the injector holes are drilled at any angle, or are they vertical (perpendicular to the flange)?

I have another 4v intake here and they seem to be about vertical...

Duke

Thanks. It's vertical, as the stock intake.

V2Rocket

thanks!

azbanks

Price?

sm

Duke:

Can that intake work with the factory 968 MAF or do you have to use a standalone (eg VEMS)? And will sanding down the welds compromise the strength of the intake? I am interested for my 968.

Thanks

MooreBoost

It seems everyone uses velocity stacks that extend into the plenum. Is there a reason for this? Ross machine set up are flush with the plenum wall.

Chris White

There are two parts to this - bell mouths and stacks.
The length of the stack is critical to the RPM range you want to maximize. Is a resonance circuit that is tuned to a particular frequency.
The Bellmouth is there to try and impedance match the runner to the plenum for less resistance (OK - i'm using that term non-technically!).

You can play with both to get what you want!

gruhsy

More interest to what Chris has posted

https://rennlist.com/forums/944-turb...d-i-found.html

refresh951

Construction reasons. No stack makes a difference but not much. Ross stuff is nice, I use it.

V2Rocket

You'll never find a conclusive answer but the general idea is that stacks sticking into the plenum are to get a desired overall runner length while short on plenum packaging space (can't move the plenum 2" to the right but you can make the runners stick 2" into the plenum).

And idealized bellmouths can pull air around 180* from the entrance point (from "behind" the bellmouth) which wouldn't be possible with a flush stack.

I made my 16v intake with stacks into the plenum more for construction reasons.

Duke

We don't have any intakes to offer but we are looking at a new design with more machined billet parts for the future.