RCinXS

Searched and searched. I can't find anything on this anywhere on the Internet or Rennlist.

Has anyone ever done actual flow testing on the 16V plenums and runners? (Spiders)

SC, Turbo or NA?

Not theoretical, but actual real world testing.

It's a given that the Euro will flow more air. And I'm sure Porsche probably did a great job in design for a NA engine.

But I'm interested in the pressure differentials from runner to runner, under vacuum and boost.

Ducman82

carl made a great intake for his boosted racer. i plan to make on some what like it. ill see if i can find the thread. might give you some ideas

Ducman82

https://rennlist.com/forums/928-foru...prototype.html

RCinXS

I've seen this thread.

Very interesting, and a lot of work went into it, but it's not what I'm looking for.

More interested in real world flow numbers and pressure differentials from the original plenums and runners. In particular, the flow / pressure differences at the runner outlets to the heads and what real world RPM points that they shift in preference. (harmonics)

Since the engine was designed for touring, it will likely happen in pairs. Once the first pair reaches it's full flow potential, all the rest will begin to take up the slack, but one particular pair will begin to flow more air than the other four, etc, etc., untill all eight are maxed out.

Knowing the sequence and RPM points would be most excellent for tuning injector trims.