993 Faq Frequently Asked Questions about the Porsche 1994-1997 993


How can I plug my front license plate mounting holes?

Filed under: Exterior — Jeff 993TT @ 8:59 pm

Many 993 owners have chosen to run without a front license plate. As a consequence, the front license plate holes are exposed.

There are 3 options:
a) Buy pre-made color matched plugs from BumperPlugs.com. Cost is about $30.

b) Buy generic black plugs from any auto parts store and touch up body paint from the dealer. Cost is about $10.

c) If you are planning to repaint your bumper or get any body work done on the bumper, the holes can be filled and repainted during that time. Be warned that any fillers used will expand/contract at different rates from the bumper, so you may see some wavyness depending on the temperature of the day.


Differences between AutoCross and Driver Education events

Filed under: Driving Technique — Jeff 993TT @ 10:24 am

Autocross the the term Porsche Club of America (PCA) uses for an event where you drive as fast as you can trough a course constructed from orange traffic cones. SCCA calls this “solo2” competition. Regardless of what it’s called, it’s a great way to learn car control in an environment where it’s nearly impossible to damage your car. PCA has more information here

DE (Driver’s Education) is a common way to refer to events held at a race track where you are not actively racing against other cars and your laps are not timed. As these events are at a track, speeds are higher and the chance of damaging your car are significantly increased. PCA has more information here


How can I become a better driver?

Filed under: Driving Technique — Jeff 993TT @ 10:23 am

Practice. Seriously, the only way to get better is to learn what the car is capable of doing (you’ll be amazed) and what you have the guts and skill to do with it.

The cheapest way to get started is to autocross. DE (driver’s ed) sessions are of benefit, and attending a driving school like Skip Barber or Jim Russell is not going to hurt. In fact, dollar for dollar, they will provide you the best way to improve over modifications to your car.

Driving skill is something you will carry with you forever. Carrying a supercharger with you thorughout your life is a bit harder. 🙂


Why should I never lift the acellerator during a turn?

Filed under: Driving Technique — Jeff 993TT @ 10:23 am

Driving at the limit is all about smooth weight transfer.

This is a hard concept for many becuase 99% of our driving we are well within the limits of our car, so whatever incorrect driving technique we do does not have any bad effects.

But when you are driving at the limit of your car, you can easily spin your car causing harm to yourself and your car.

If you are in a turn and you lift off the throttle abruptly you will transfer the weight to the front wheels and off the rear wheels. Since most the weight is in the back in our 993s, this is going to allow the heavy rear end to keep going in the direction it was before you lifted (remember that high school physics about an object in motion tending to stay in motion?).

The result is you spinnig. The rear end can keep moving becuase there is not enough weight on the tires to provide the friction to keep it in place, becuase you transferred the weight to the front tires.

Only do an abrupt lift (and only do heavy braking) when you are going straight. Yes, slamming on the brakes in the middle of a turn is another way to spin.

Staying on the gas during a turn is one of the hardest things to learn. It goes against every ounce of common sense. When you are going too fast into a turn, the last thing you want to do is go faster. But you have to fight that urge becuase you will spin otherwise.

What is heel/toe’ing?

Filed under: Driving Technique — Jeff 993TT @ 10:23 am

The “heel and toe” technique is used when downshifting during performance driving. The driver places the toe of his right foot on the brake pedal while leaving the heel on the gas. An alternative is to use the left side of your right foot for the brake and the right side of your right foot for the gas.

This allows the driver to then brake, downshift, and “blip” the throttle in a very smooth and coordinated motion without lurching the car when the car reengages in the lower gear.

This motion allows the driver to match the engine speed to the actual wheel speed upon downshifting.

To practice this, you should start with just mentally matching revs on a deserted street. Drive about 30-40 mph and run through 2nd, 3rd, and 4th gears. All the time matching the engine revs with your speed and gear selection so that the engine engages smoothly.

After you are comfortable with that, try to add the braking element. You will try to follow these steps in this order:

a) Drive along in 3rd gear
b) Brake slightly
c) Clutch in
d) downshift to 2nd
e) blip the throttle

Note, steps b, c, d, e are all done at the same time

f) Clutch out
g) get foot back on gas ( just keep an even throttle for practice though.. )

Why is the ignition key to the left of the steering wheel?

Filed under: Electrical System,General — Jeff 993TT @ 10:00 am

The ignition switch on the left side of the steering wheel ( right side for RHD cars ) is left over from Porsche racing heritage.

These old races started with the drivers sprinting to their cars, starting the car, and then driving away.

Porsche put the ignition on the left side to make it faster for the driver, allowing the driver to start the car and shift into gear at the same time.


What is the origin of the Porsche crest?

Filed under: General — Jeff 993TT @ 9:58 am

by Terry Lovett, Porsche Club of Canberra, Australia


THE CREST: In 1951 Porsche was finalizing plans for its move from the war time sanctuary of Gmund back to Stuttgart. Importers and agents selling his product made it clear that customers wanted some sort of trademark or badge to identify their vehicles, which till then, only carried the word “Porsche” on the body work. In 1952, Professor Porsche had devised the basic design of the crest. Folklore has it that he sketched it on a serviette during a luncheon. Whether true or not, it was Messrs. Lepper and Riemspiess of the publicity and design studios who carefully finalized the design.

There are three components: the family name, of course, is positioned at the top, while the other two components reflect Porsche


Can I install GT3 seats in my 993?

Filed under: Interior — Jeff 993TT @ 10:09 pm

GT3 seats can be sucessfully installed in the 993, with the appropriate rails. These seats are much lighter than stock seats, weighing approx 6.5 Kg. The stock seats are around 30 Kg. The seats are available in both leather and cloth.

Click here for a picture of the GT3 seats.

Installing the GT3 seats also has the benefit of lowering the seating position from 1″ to 1.5″.

These seats can be ordered online from Carnewal.com.



Smoking exhaust on startup ( NA cars )

Filed under: Engine,Exhaust — Jeff 993TT @ 11:17 am

A small puff of smoke on startup is not any cause for alarm. If it does not go away after 5 seconds, then you will have to seek the advice of your mechanic.

There are many different reasons for this:

a) Boxer engine design – Allows oil to pool in the cylinders after running, probably due the expansion/contraction of the cylinder walls, allowing a small amount of oil to seep through. This has not been verified.

b) Overfilling the oil. Check the owners manual for the proper procedure for checking a dry sump oil system.

How do electronic boost controllers work?

Filed under: Exhaust,Turbo — Jeff 993TT @ 9:54 am

A wastegate is a valve that regulates the boost in our cars. It does this by opening at a preset setting and allows exhaust gas to bypass the turbo out to the atmosphere (either through a muffler or directly out.). This keeps the turbo from spinning faster, therefore keeping the boost at the preset setting.

Speaking strictly of external wastegates, most, maybe all, wastegates, electronically controlled or manually controlled have a mechanical spring in them. When you install a 1bar boost spring in the wastegate, the turbo will not produce anything more than 1 bar of boost. Since it is a mechanical device, as the pressure on the spring increases, it begins to open the wastegate, so by about .5bar, the wastegate is starting to open even though it has not yet reached full 1 bar boost. This causes some degree of inefficency as the boost does not build as fast as it could by keeping the wastegate closed until 1bar. Additionally, a manual wastegate, although set with a 1 bar boost spring, may tend to fall off in the upper gears and may only allow .8 or .9bar.

An electronically controlled wastegate, uses engine vaccuum/boost pressure to assist the spring tension and keep the wastegate closed until its preset setting. Take the above example of 1bar. An electronic controller can usually handle about 150% of the spring rate, so if you install a .7bar boost spring, the controller can be set to control from .7bar up to about 1.05bar of boost. Once the electronic controller senses 1bar, it will release the spring and the wastegate will open and it will regulate it exactly at 1bar assuming it was programmed properly. You can also usually change the setting on the fly. If for instance, you wanted less boost while driving in the rain, you could set it to .7bar with the touch of a button.


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