Stealth 993

It should be easy. I believe you also need the 95 intake plenum as it doesn't work with varioram.

mr_bock

Once you experience the added, no lag power on demand, you will never want to go back to 'stock'!!!!

I LOVE my TPC powered car!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!

George from MD

Althought I don't have the TPC kit I will say Mike Levitas and his folks do fantastic work. Mike is frequently at the track providing free adjustments (and virtually unparalled driving and set up advice) to everyone- not just his customers. He also contributed greatly to our Vets on Track program last year giving the Vets rides in his Rolex winning Supercup. Truly a great guy.

Timspu

I am running 352 bhp at the crank and have an intercooler fitted. The car is running 6.5 psi boost at 4k but drops to 4.4 psi up to 6800 rpm. This is the area where BHP could be improved. If the boost could be maintained at 6 psi it would be an animal. The problem is with the design of the roots blower, it drops pressure as efficiency falls off with increased RPM. The up side is the engine is not strained at high RPM's giving good reliability.
i have had no issues and i installed the kit myself in the back of my garage. The kit can be removed and the car put back to standard. Its an expensive mod but if you love the car and are keeping it then its the best after market bolt on you can buy. The guys at TPC are also very helpful.
Loads of fun.

TheOtherEric

Another option is run a bolt-on intercooled twin turbo setup to get over 400 fwhp, for around $8800. Just email me.

Sorry for the shameless plug.

MPB993

Dear all,

Thought you might be interested in the performance improvement I see from having a tpc kit on my 993 tip

BR, Mark.

fishing

MPB993, thanks for posting the graph. Later this year, I might asdd a TPCracing SC to my 964.

Timspu

MPB33,
Please could you also post your dyno results. When i open the attachment i can only view the speed tab.
Thanks

MPB993

Hi there,

the dyno from the gtechpro does not compensate for air or rolling resistance and shows the power at the wheels after all this so isn't really of much use in comparison to a real dyno. However, on a proper dyno I managed about 320hp at the wheels, with increased boost pressure (2.8" pulley) and methanol/water injection ahead of the SC instead of the chargecooler, 100cell cats and an improved intake for the SC. The m/w injection improves the efficiency of the SC. I also tuned the splitsecond box to optimise A/F ratio but couldn't change the ignition timing so not completely optimal. This over a large number of gtechpro runs. The rundown transmission loss was about 55hp on the proper dyno given about 375hp at the crank.

Hope this helps,

BR, Mark.

onefstm

Its a great kit. I bought my car in 2006 with 29k miles on it. It was the original prototype car for the TPC supercharger kit, was owned by Mike Levitas, and was featured in both European Car and Excellence. I should be able to scan the Excellence article for anyone that is interested.

My car was supercharged at 20k miles and tested on the road and track extensively by TPC. When it bought the car, it had the original Split Second timing control unit running 4lbs of boost. I upgraded the kit to the 6lb pulley and their new at the time uni-chip control box. I also fabricated a air-air intercooler under a RS tail. The motor is all stock and has never been opened up.

My car now has 54k miles and has seen at least 25 days on the track by me. On the track, I run 98 or 99 octane unleaded. On the street, 93 works great.

The car has been trouble free, is as fast as 993tt, and has amazing low end/mid range torque.

Denise993

Hi George,
I haven't seen you posting in a while. Hope to see you at some local events this spring!

RDS928S

Jeremy,
can you post a pic of the intercooler and the RS tail configuration?


Thxs

tjangi

Are you planning something? Here is a word of advice, Just do it

Timspu

Please could you advise what size pulley you are using onthe SC and what boost you are running. Does your boost drop off above 5k revs. I am running a 2.8" (70mm) SC pulley and a 5.76" (144mm) crank pulley. This gives me 6.5 psi at 4500K dropping to 4.5psi at the red line. My set up is a Gen 4 TPC kit.
Cheers
TI M

MPB993

Hi Timspu,

the pressure drop off is typical for this type of SC as the engine gets on cam and becomes a more efficient airpump from the intake manifold to the exhaust. Although the characteristic of the SC does change with rpm this is more linear than the engine intake characteristic. This means that the intake pressure drops but the air flow is a relatively linear increase with rpm. This is why the torque curve is much flatter than the standard engine. So far ~50k miles on the kit. Also tried a 2.6" pulley which increased the intake pressure but no overall improvement in output as more heat than power was generated.

BR, Mark.