Mister Quickie

With 315 hp being non competitive on the street at this point I've been taking a serious look into this:
http://www.tpcracing.com/products/TP...CT-Conversion/

a) has anyone had experiences with after-market turbo on a 996 and if so, good/bad?
b) what's the difference between a supercharger kit and a turbo kit?
c) would either kit in b) above be too stressful for my engine causing it to prematurely fail or can the engine handle the extra boost?

520 hp ...

NZ951

Sorry but non competitive on the street? You dont need to be competitive on the street...

Apologies for the flame, but not knowing the answer to question b suggests 315HP is more than enough for you for now.

ChristopherG

A modified car is never as reliable as stock. There is always a trade off, The boost levels are relatively low so lag shouldn't be too bad but there is always some lag. Looks like full boost dosen't hit until about 4,000 rpm.

Finding someone that can do repairs on a modified car is iffy sometimes also.
At $10,000 for the kit I would sell current car put that $10,000 plus the cost of install on top of it and buy a car that was a turbo from the factory.

nick49

This had been discussed many, MANY, MANY times already. Do a search. If you don't want to read all the crap. The short answer is sell your car, buy a 996 Turbo. Want more, and all the reasons, do a search.

82_930

Do you honestly think that some guys in a garage know better than 10 years of research from a team of PhD's with a budget consisting of millions of dollars from Porsche? If so, go buy their turbo/supercharger...

The ONLY thing I would mess with, is perhaps mufflers...just for the sound and no other reason.

911FM

+1. Not sure what you mean by street competition... Started on the wrong foot.
If you want to have fun, may I suggest participating in DE events (PCA, BMW, etc.).
With a few minor modifications, you will see that your car can actually be very competitive and keep up with much higher HP cars. Straight line power is not the only factor. Cornering and handling is more important. In any case, the biggest mod is behind the wheel... Once you are sure you have reached its limit, you may choose revisit the Supercharging vs. Turbo issues (which is still an interesting topic).

FM

Lawson4323

A) Unfortunently you won't find much of that going on here. I'am still new to the Porsche forums but there's no where near as many people doing serious hp mods as people would do in the for example bmw forums

B) If your asking this question forget about any aftermarket turbo Porsche. You'll reget it big time. Get yourself a little car like a Jetta vr6 and turbo that. Build a kit yourself and familiarize yourself with turbo cars. You'll gain more then 300whp and youll kill your bank account far less. Right now your not ready.. Sorry. Then again if you really got that cash then go for it.. Make sure you put up a build thread to motivate others.

C) Making more power in anything, any way, any how will cause more stress. It's just the way it is. Boosting a car that came na from 300 to 500hp is a lot and you WILL break things because you WILL want to push it and DON'T kid yourself and say your going to baby it everywhere

philooo

sell your car and buy a turbo, will cost the same and it will be RELIABLE !

Hyper911

I agree with the others for big power buy a turbo to start. I did mods and enjoy the car more, its quicker and handles way better and is 10x more fun to drive. If you want to win on the streets you should get a new Mustang, S/C it and have a 10 sec car. Porsches are not about winning on the street, the track though is where they shine, brightly.

TPC Racing

The turbo kit is not too much for your engine to handle. We recommend running the car at 4 to 6 psi with the boost controller. We have several cars with this system and they all run great and very strong.

Mister Quickie

Just to clarify on the difference between turbo charger and super charger:
I wasn't asking from a technical perspective but moreso from a "in what situations/driving conditions/scenarios is a super charger the better tool and when is a turbo the better tool?" perspective.

The track is great but 95% of the time, the challenges occur either at a stoplight or on the highway, not the track and the "course" isn't going to have many turns but a straight shot for the most part

dotframe

LOL

Capt. Obvious

There are as many answers to this question as their are turbo/supercharger options.

Generally speaking, a supercharger is going to give you "instant" power, more low end torque and a smoother power curve whereas a turbo will offer more horsepower higher in the power band and will have a more aggressive curve.

With that said, you can make a turbo or supercharger behave in either manner based on the size of the turbine/compressor/pulley/etc. you choose.

Kodiak535

Show you are a real man by declining those challenges. You have nothing to prove and are only endangering yourself, others, and your car.

Rdrcr

I've had both (and nitrous too) on many, many cars that I've owned and raced (drag and road course). For the street (and occasional track), I always preferred the instant power of a positive displacement supercharger. The Turbo is more efficient and will always give you more HP and higher trap/top end speed but, it really depends on your goal.

Mike