I was wondering if people would chime in on their power modifications and how pleased they are with them, also how many here have had a good exprience super or turbo charging their car? I would like to thicken out the midrange of my car but I am also debating doing a FI system.

 

Here is a review I made after a few upgrades. I didnt go the FI route, I wanted to keep this car NA.

https://www.6speedonline.com/forums/...ir-filter.html

These mods are simple and made a nice difference in driveability. I have no regrets or problems and she still looks stock.

 

Matt, Thank you for the information and the link to your older review. That encourges me to proceed down this path. I am courious if you have PSE or not?

Thank You
Randy

 

Nope, I kept the stock mufflers and tips...Only thing to really gain from changing them out is looks and sound.

Good luck!

 

You can spend all you want, I did, and not gain much until you go for FI (forced induction). I am now SuperCharged, running 530hp, and it's an easy to drive daily car.

There is a used VF-E SC for sale on eBay, for sale by Jason Ellis (jellis here on 6speed) and although it's missing a few bits here and there you could have it complete for $5k which is a great deal. Add AWE cats, $1k for VF-E's GIAC ECU tune, $300 for gundo cans, and you're set. Beyond set, actually.
CATTMAN

 

I also had 2 997.1 cars (05 and 07) . The 07 I modified with the Tubi/F77/software package.

Before i explain what led me to this I want to say that my feeling has always been if a person wants a Turbo he needs to buy a Turbo. However if he wants to maintain the basic status of a normally aspirated car and simply "tune" (enhance) it then he has choices.

Porsche themselves offer an X51 package. Even though it's expensive it is very well made and tested under all types of conditions --not just in a lab with a dyno.

BUT -- given that you have a stock car and it doesn't have X51 then the next step is the aftermarket. As a person who is not an auto mechanic or a Porsche specialst I began just like you .. asking questions and listening.

That led me to accept the intake/exhaust/software config . Most whom I spoke with were happy and they had reliable cars. When it came to intakes there wrre many choices and I did like a few of them . I didn't want to have an intake which sucked engine heat in and the F77 seemed to show a beautiful cool flow design. Those wrere my impressions .. i bought it.

The Tubi is so well made and polished . I loved the sound.

Added to the setup was software flashed by Evoms. I was very pleased.

The sound was great. The gain was modest , linear, and seamless. The hardest part with choosing is that it's not easy . I didn't get to drive five different setups and decide . I only knew a few people with modified Porsches at that time because even though i owned several before it .. I had always kept them stock .. and that was ok too.

 

Cattman, did you need to upgrade your clutch or will the stock unit suffice? Do you need to pull the motor out for the install. Also I am 3 hours away from TPC and their turbo system sounds good but I don't know how it compares to the VFE SC. Also how reliable do you think the engine will be after the mod, does it throw codes alot? Do you think the motor and trans will hold up or should we budget for a replacement in the mod. I am seriously considering FI but just want to get as much input on it as possible. Also lastly, is the power delivery still smooth enough to run it hard on the track or is it pipy. Sorry for the rapid fire questions. But I am dying to do this mod.

Randy



In Christ

 

Getting lighter (especially smaller) wheels will free up some horsepower. Not to mention reducing braking distances and acceleration times.

 

i did before and after dyno
2005 997 s
giac flash
pse
suncoast headers
evoms CAI

showed zero gain!

 

High flow cats?

What about the butt dyno? Do you 'feel it', but don't see it on the dyno? Do you think others feel it, but it's not really there?

 

P997s, Ouch that would upset me. So did you appreciate it at all or big no no

 

Zero gains where? Low end, mid range, top end? If you are saying the before/after dyno plots could be laid on top of each other and show no differences, then I would be very suspect of their dyno....not your mods.

Plus if you kept the stock cats, that could be your bottleneck.

 

Let's just say I would NOT do it again

I had stock cats

 

Hi Randy,
I had already installed a Sachs Stage 2 clutch and hi-performance pressure plate, along with a lightweight flywheel prior to doing the SC. If you have to replace your clutch, then a Stage 2 is the way to go, as it's very drivable yet will hold more power than stock.

I don't much about the TPC, but I can tell you all about the VF-E SC, as I did the installation myself, and have been running it for about 4 months and 4k miles. No, I did not have to drop the engine to install it, it can all be done on jackstands, which is how I did it, although a lift would certainly make it easier and quicker.

In terms of long-term reliability, who knows. There are many out there running the same PSI or more who have done so for years, and tens and tens of thousands of miles without incident. Sometimes, even a stock engine goes bad, so it's hard to say, although even with a modest 6.1 psi boost, I am placing add'l stress on engine parts. I am confident that it's well within safe tolerances, however, so I am not overly concerned. I installed on a well-broken in engine, with over 45k miles on it.

After installation the ECU has to get tuned by VF-E, who work with GIAC on their custom package. It's a grand for that.

After full installation and testing I threw some codes, but then changed my spark plugs, and since then I've not thrown a code- nothing unusual whatsoever.

Power delivery mimicks the OEM hp and tq curves, just a lot more of each. It's perfectly linnear, as an SC is belt driven the boost builds progressively with RPM's, so there's no lag then waaaaamp moment like in a turbo.

Here is a dyno sheet so you can see how progressively HP builds with RPM. I don't get peak boost until near redline, so I can really use the throttle to control my boost.
CATTMAN

 

I have a '06 C4 and debated for a long while about which performance mods to add. I wanted better sound and more power. Selling my car and purchasing a new or used 997 turbo would cost at least 30-40k and I didn't think that was worth it for me. The cost of most aftermarket exhaust systems was in the thousands with questionable power gains, albeit better sound. The performance mods I saw like updated plenums were minor or overhyped in many cases. So... after some hesitation or read that trepidation I went forward with the TPC turbo. The TPC turbo comes with its own custom exhaust. I haven't regretted it. I feel like I have a totally different car and the power is overwhelming. And the sound is great too. Overall this is a bit over 10k including install but I think it represents the best bang for the buck and gives serious power.

If you are planning on selling your car soon, then it's probably not a great investment, but for that matter any mods are horrible investments as well! But if you think you'll hold onto your car for a few years than I'd recommend you look further at forced induction. TPC is in Jessup, MD, not far from where you are, so you could probably drive up there and catch a test drive. That may change everything!

Good luck on your investigation. And once you make your choice, don't look back. Part of the fun is in the change.

Bob