Renown Performance

iTrader: (8)

YAY! you the man!
your a man right. lol

redturbomiata

iTrader: (5)

I wonder what you can do with a 90-93, seein as how it doesn't have egr.

shuiend

iTrader: (24)

I am almost certain that is my old 94 IM that I just sent them. I can not wait to see what type of numbers it makes.

Renown Performance

iTrader: (8)

That it is! Very excited how it turned out personally!

-Sam

Doppelgänger

iTrader: (12)

Depends on the day...

Renown Performance

iTrader: (8)

LOL. ooooh Fridays!

Faeflora

iTrader: (2)

Y8s FYI I have a 99-00 intake that is completely gutted.

Faeflora

iTrader: (2)

BTW Renown, please measure volume before and after port/gut.

I gained about .7 or something liters after gut

y8s

iTrader: (8)

Yeah I'm still unconvinced that it's a worthwhile mod but then I haven't seen apples-apples dyno plots comparing a stock 99, 01, gutted 99, and Keith's dual runner style 99, and an 01 with the VTCS removed.

But I'd like to.

Oh Reeeeeknownnnnnn?

Faeflora

iTrader: (2)

Hey now, two dyno days ago, I demonstrated a lovely flat HP line holding to redline. Proof of gut airflow joy. And that was with a big *** boost sag too.

Braineack

iTrader: (62)

what? if anything that proved your setup sucked big time.

Faeflora

iTrader: (2)

Sigh... maybe you're right. But I will dyno again next week and report here. Boost is holding steady to redline now so results should be useful.

Braineack

iTrader: (62)

cuase if anything, the better flowing IM will keep the TQ flatter longer, thus the HP peaking later.

y8s

iTrader: (8)

that's fine
now put a stock manifold on yoru car with exactly the same setup and do it again.

Renown Performance

iTrader: (8)

Yea the Extra volume will be measured we just wanted to get this first one opened up to show you guys what whats up. LOL

I am working with Ben at DIY Autotune about testing the different Manifolds for us. We hope to have dyno results soon. Its nice to keep things unbiased.

One thing we would like to make clear is that we are trying out a few different porting Theory's on the manifold, one may work better then the other. However we have an awesome Porting team that have mad porting skills yo! LOL. In all honesty though our team has years of experiences and will be applying what they know and and have seen work in past projects.

oreo

I did this exact porting on my manifold, used in conjunction with a PD supercharger running at ~20psi. Opening the manifold valve, results in a boost drop of 2psi @ 7100rpm, indicating this mod improves flow. (it also increases boost at 2500rpm, so I am controlling the valve with a MS)

In turbo applications, I understand you are also looking for additional volume, so you probably want to remove as much material as possible.

Before:

After:

triple88a

iTrader: (2)

Any noticeable difference in power?

Faeflora

iTrader: (2)

More flow = more air which + fuel = more power

nitrodann

Same setup and less boost at the plenum= more flow, more flow = more power.

What do you know, someone agrees with Fae. Just kidding mate.

Dann

oreo

Yes, with a turbo, you should have constant boost, so the engine will be flowing more air, which means more power.

With a positive displacement supercharger, it's a little different. The supercharger will pump almost the same amount of air with 2 psi reduction in backpressure (boost). Lowering the boost, by reducing the engine restriction, will reduce the HP required to turn the supercharger, and allow the supercharger to pump a tiny bit more air.

I'm going to the dyno later this week, and intend on doing a run, with the butterflies in reversed position (open at low rpm, and closed at high rpm), to see what the HP difference is. I would expect there to be a larger difference with a turbo.