24FPS

was thinkin' of runnin' something good thru the cab for it's christmas present

if you want to treat the 993 to a lil' kick-a$$ here's the list:

(was doin' a search & found this listing... so i'd ring before you go to a station)

Agoura 76 - at the Chesbouro off ramp of the 101 freeway in Agoura.
28203 Dorothy Dr.
Agoura Hills (818) 991-6241

Bellflower 76 Service
16719 Lakewood Blvd.
Bellflower (562) 633-9176

Downs Oil Co. *
1296 Magnolia
Corona (909) 737-3421

Fishback Motorsports *
El Cajon (619) 912-3876

Huntington Beach Car Wash
18971 Beach Blvd.
Huntington Bch. (714) 847-4924

J & R Shell
1808 White Ave.
La Verne (909) 593-7015

Brentwood 76 Service
12037 San Vicente Blvd.
Los Angeles (310) 476-4818

Graham 76 Service
2690 San Miguel Rd.
Newport Bch. (949) 644-7151

Norwalk 76 Service Center *
10951 W. Imperial Hwy.
Norwalk (562) 868-8659

Southern Counties Oil *
1825 W. Collins
Orange (714) 744-7140

Arroyo Parkway 76 *
155 E. Glenarm
Pasadena (626) 441-3392

Phillips Ranch 76
16 Village Loop Rd.
Pomona (909) 623-2429
Phillips Ranch in Pomona, CA. Take 60 fwy, exit phillips ranch road and go north, then turn right on village loop and it will be on left hand side (about 1/2 of fwy exit).
100 Octane unleaded

OsbornÍs 76 Service *
1870 S. Elena
Redondo Beach (310) 373-5043
www.osbornauto.com

Cosby Oil Co. *
6220 Fairmount Ave.
San Diego (619) 280-6884

Star Propane *
4426 W. First St.
Santa Ana (714) 839-7676

Cosby Oil Co. *
12902 E. Park St.
Santa Fe Springs (562) 946-4404
www.cosbyoil.com

Canyon Service & Detail - Uses unocal gas*
507 Entrada Dr
Santa Monica, CA 310-454-2619

* Sears Point, Unocal 76
100 Octane unleaded (blue)Ê
114 Octane leaded (orange)Ê
Sears Point Raceway in Sonoma, CA.

KRS Distributing *
8230 Pacific
Stanton (714) 816-8983

Downs Oil Co. *
42088 Rio Nedo, Suite 101
Temecula (909) 506-4545

Playa Vista 76 *
8300 Lincoln Blvd
Westchester (310) 649-4683

Kahn 76 Service
150 S. Citrus
West Covina (626) 339-8018

Woodland Hills, Texaco
101 OctaneÊ
Woodland Hills, CA. NorthwestÊcorner of DeSoto and Van Owen

Yorba Linda 76 Service
18351 Imperial Hwy.
Yorba Linda (714) 693-2546

Martin S.

Bring it out to the Porsche Owners Club Short Track Series in January. You can get the actual date off the web site:Porsche Owners Club. This way you can run the car with your foot to the floor for at least four (4), maybe even five (5) sessions. This will be a real treat for the car (And for you too!). No fancy safety gear required other than a helmet.

LA964RS

Also, as an fyi you can calll Trick as they have several 100 octane pumps around. One right at Van Nuys Airport just of 405....

tj90

I found 100 octane gas in 5 gallon drums at a Smokeys speed shop in oceanside, ca. Im sure other speed shops may have it as well. Definietly worth calling your local shop and if they dont have it, Im sure they can point you in the right direction.

Randy 1

I remember seeing the price of 100 octane gas during the height this summer at the 76 on the Arroyo Parkway on ramp in Pasadena going for ~$7/gal. Uh, yikes.

c993k

Like $200+ a tank, Chris

Adam M

Geez, these topics on high octane gas always make me nuts. Unless your car is "pinging" there is NO NEED for higher octane. One mis-understood fact is that you do NOT get more POWER from high octane. Actually quite the opposite! You get the most power from gasoline that is just below pinging. The reason is that high octane gas is harder to burn. That also means that is makes less power!

Now if you are building a race motor, the way to increase power is to raise the compression. If you raise the compression you need a higher octane gasoline. That is why high octane gasoline exists.

So the bottom line is DON'T WASTE YOUR MONEY!

Have a nice day.

Martin S.

Adam may be right on....in my experience, as verified by wifey (Scientific enough?), if she were to drive the care after a weekend where the car had been at the track and had been running on a blend of 91 octane and 100 octane to create a 95 octane blend, she told me the car seemed to run better. I have learned never to argue with wifey!

Also, I always blend up to 95 octane for the track. That's about 9 gallons of 100 octane to 10 gallons of 91 octane = 95 octane..spendy, but maybe worth it?

There is no time when my foot is not to the floor, well almost no time...if I can eliminate any possible pre-detonation with higher octane gas, then the electronics won't have to retard my ignition, at least I think that's how it works. Maybe its all an urban legend....

chris walrod

The risk is, most pinging cannot be heard by the driver. I know my car pings on the uber high octane we get here (91) cause every once in a while, I can hear it when I am near a wall or high curbing where most sounds bounce back. I hate it.

With 99K on the original engine, perhaps its time to pull her down and clean-up the heads, valve job, guides etc.

Adam M

Well see that is different. If it IS pinging that is bad. Your lucky you can hear it. My track car is way too loud to hear it and it's has cost me...

For cars that don't have knock sensors, it is better (safer) to go higher on the octane (93 if you can get it), *especially* if you are tracking the car. For the new cars, like the 993, the knock sensors are amazing. They can retard the timing in any one cylinder as needed. Now if your car IS pinging, a higher octane will make more power because you are not loosing power due to 1) the pinging (pre-ignition) or 2) the motor retarding the timing to protect it.

Keep that in mind that my whole point was that you make the most power at the octane level that is just above any situation that causes pinging. My old chevy van (tow vehicle) got to the point where "regular gasoline" was pinging after putting on an additional 40k+ miles of towing and many long years. You could feel the difference when putting in the next grade octane because it wasn't detonating.

I heard about all this from my friend who grew up and is still friends with Danny Jessel (if you've ever heard of "Jessel"), who builds 1000 - 2000+ HP drag race motors. These guys go insane trying to eek out every possible horse power. These guys are really nuts.

deltawedge

Not exactly.

Although it is true that running higher octane than your engine needs to avoid detonation does not improve performance, as Chris noted, a driver may not know when the engine is experiencing detonation (monitoring using a Hammer would be ideal). At high rpm, there is a lot of background noise (music?) which may drown out the detonation. Detonation in all cases is never good, and it can be very bad. So spending a few extra bucks to avoid major problems may seem like a good trade. Especially, if you occasionally hear detonation.

An interesting link on octane

That said, the energy content of a fuel is independent of the octane rating, so a blanket statement about a higher octane fuel than needed making less power is not a logical conclusion. Higher octane rating fuel has an increased resistance to detonation (i.e spontaneous combustion of the unburnt air/fuel ahead of the flame front initiated by the spark); it is only a rating system used to indicate the resistance of detonation. Now, if all gas stations advertised the energy content of the fuel along with the octane rating, then we would have something.

A point I had not thought of (as mentioned in the link), is that premium fuel may have a higher energy content due to the composition of the fuel (i.e. more carbon bonds).

deltawedge

Thanks 24FPS, I'll be making a visit to the Newport Beach location.

Adam M

I never said that you should run less octane than needed. What I'm trying to point out that putting in a tank of 100 octane is not necessary. If you are detonating, then it is worthwhile to add enough higher octane fuel to bring it to where you need it.

That is a nice link and does state that people always think that higher octane = more power. That is the point I was trying to make. I did find it interesting that it says that if you live in a higher altitude that you may only need 91 octane instead of 93 for maximum power.

When I look on the inside of my fuel cover on my 95 993, it says that it requires 93 octane. Luckily we have that on the East Coast. I've heard that it is not available in all areas of the country, but maybe they don't 'need' it where altitude is higher. So I found that very interesting!