AWD

I have been debating this project for a long time. I know its possible to get custom exhaust manifolds made for using external wastegates (Tial, HKS, Greddy), however, I want to raise the boost pressure, and am wondering if there is any type of bypass for the ECU to run any type of electronic, or even mechanical boost control. <img border="0" alt="[blabla]" title="" src="graemlins/a_smil17.gif" />

BTW, this is for 01' 996TT.

Also, if I were to use a stand alone computer (MoTec, Haltech, Pectel, etc.) would this be an effective way to control boost pressure? I think these programs can control boost...can anyone verify?

Thank you in advance.

Chris Y.

I think wilbur has an external wastegate setup. I got a ride in his car a few weeks back and I can definetly hear his wastegate!

Shoot him an e-mail at tuningparts@yahoo.com.

AWD

Yes, I've seen Wilbur's car, yet I did not know he was running external wastegates. I know he is running a pair of Garrett ball bearing turbos and a exhaust I've never seen before (I know he deals with Imec Japan, so I'm assuming that its an Imec or a Protomotive custom piece, though I could be wrong.) Wilbur?

PorschePhD

The programming has to be set higher than the EBC is set for. Otherwise as you raise the boost it passes the external map and the system thinks that it has a problem and kills the timing and throttle body closes. The manifold pressure will drop down even if the gauge reads higher because of the throttle body. This is not a common upgrade unless a special situation exist such as Chad and Wilber. The car should be able to control the boost based on external circumstances and not driver controlled. No offense but in most cases the average owner doesn't have enough info to safely turn up the boost. The ECU does.

AWD

Yes, I surely know I cannot just install the boost controller and leave it at that. If using the boost controller, I am also after more fuel, give the timing a bump, etc.

I figure the switchable ECU would be a easier route, rather than going stand alone comp., boost control, going to external wastegates (which I might do anyways), and dealing with all the tuning. Is the switchable chip available yet???

The car is making 500 hp at all 4 wheels @ 1.1 and 94/95 octane. I give most the credit to the custom turbo's I had specially made.

I am after the magical 600hp, however 550 will be just fine. I was hoping I could get it through tuning, however that sounds too dreamy...

Anyhow, I appreciate all of your feedback...This is my first attempt modifying a Porsche, so everything is a learning experience.

AWD

Chad,
I probably have a much larger drivetrain loss through dynoing my car at 4 wheels as opposed to rear wheels. I am looking for approx. 550hp at all 4 wheels. My first ever stock baseline dyno was 319hp at all 4 wheels.

The Evo and Imagine Stage IV is all rated at the flywheel, correct?

So if I did my math correctly, if I put 319 down stock, and I am hoping to get 550 at all 4 wheels, that should equate to about 715 flywheel Hp. What numbers does Evo. and Imagine claim for their Stage IV kits???

PorschePhD

We normally get out of the Stage IV 600 At the flywheel and almost 700TQ. My RWHP was 509 and my TQ was 590.

We now have the GT and V will be released soon as well.

The ECU switcher has taken another testing turn and we blieve it truly will be ready in a few weeks. So far the rest of the data is 100% on. It will have a different face which I will explain in time.

AWD

Hey Chad,
I have already had the gears cryo. treated! I am debating if I should disconnect the front differential if I am shooting for something around 650-700 f/w hp. Are you still running AWD? Chad, you mentioned earlier that the clamps and hoses can't hold past 1.2bar....I have been using Turbonetics T-Bolt Clamps throughout the entire turbo system, and I had the rubber turbo inlet pipes made out of silicon from Samco Sport. They have never slipped off.! Also, I tried out the S Car Go carbon fiber intake plenum, and my car lost some power, and had a strange surge at idle. Car felt just as fast without it, so I took it off the same day I installed it (It wasn't that pleasing of an install either... )

Chad, you strengthened your driveline in all the right places... I think you are good for 1000hp!

Stephen,
Thank you for the info...I will contact you within a few weeks regarding some info. on the ECU switcher. I would like to try it out, when all the bugs are worked out!

Again, TIA!

AWD

Chad, thank you!!

Your information is far beyond helpful. I would have never thought the diverter valve hoses would fail. Time to give Samco another call...they can make stronger versions of just about any hose. They make from silicon.

Oh man, I have to tilt my engine again...? <img border="0" title="" alt="[Eek!]" src="eek.gif" />
I hate installing these things... also, now I am thinking going to HKS blow off valves with their new recirculator kit. A bit better quality, and while I'm already doing another install...might as well upgrade to better valves.

Thanks again...I will post progress!

AWD

I'll give Rob a call in a few days regarding the diverter valve hoses.
Thank you.