SLIPSTREAMOFFICIAL PUBLICATION OF MAVERICK REGION PORSCHE CLUB OF AMERICA

SEPTEMBER 72

"There is no such thing as the perfect car.There is only the perfect car for now.A car with all the latest provenengineering concepts and design ideas'

Dr. Ferry Porsche

Forest LanePORSCHE I AUDI2640 FOREST LANE DALLAS

SLIPSTREAMOFFICIAL PUBLICATION OF MAVERICK REGION PORSCHE CLUB OF AMERICA

DON SPAULDINGCHARLES DAVISCHEE RICKETTSTOM PURTILLLEE PAULSEL

RODNEY RICKETTSBARRY GIBBSJANE PURTILLJOHN STOREYLEON COWANRICHARD CORBEILLENANCY CORBEILLEROGER CHANEYPEGGY CROMERMYRON KRUPPBOB HORNBARRY GIBBS

817/738-8998817/261-6175817/732-6829214/350-7395817/924-8927

817/732-6829214/826-4786214/350-7395214/298-1321214/328-3449817/275-7728817/275-7728817/834-1826214/528-4337817/283-6913214/231-6290214/826-4786

NOTE:EDITORS JOHN AND DIANE ETZEL ARE ON SUMMERVACATION. CONTRIBUTIONS TO SLIPSTREAM THRUTHE MONTH OF SEPTEMBER SHALL BE MADE TO THEADDRESS AT THE LEFT BEFORE THE 28TH OF THEMONTH.

RibbetEvery four years the Republicans and Democrats get ready for an elec-

tion year. Not so with Maverick Region - every year is an election

year for us. As an early reminder nominations shall be in order in

October with elections following in November. Nominations and subse-

quent voting are your club responsibility. Non-participants in this

Democratic process have no room for complaints concerning choices of

administration for the next year. Put on your thinking caps and have

your nominees ready for October.

It was with regret that I received a resignation recently from John &

Diane Etzel, our Slipstream Editors. For the first half of this year

they had done yoeman duty in this difficult position. Thanks to them

for a job well done and congratulations to the new parents of son,Karl (8 lbs. and 2 ozs). Until a suitable replacement can be re-

cruited, please bear with us.

If you change your address, please notify the Slipstream office, Box

17483, Fort Worth, 76102. Without this information we cannot find you

and besides at $0.10 per returned Slipstream, I'm going broke. Help'

Plans are being finalized for Octoberfest, (at Forest Lane Porsche-Audi), 28 October and a wine tasting on 13 October. No formal dinnershall be served at the wine tasting event and chances are good thatthe location shall be other than our regular meeting place. Consultnext month's Slipstream for complete details.

The Telephone Committee has not been pressed into service this monthfor several reasons. If you have comments, good or bad, concerningthis service to members, please contact Chee Rickets, Chairwoman ofthe Committee or this writer.

Entrants in the various events at the Seventeenth Porsche Parade at

Lake Geneva recently received a booklet listing all final results.

Maverick Region did very well. Concours, Charles Davis was 4th in

Class 911 and 16th Overall; Autocross, Ralph Akimoto was 38th in

Class 9, Charles Davis was 3rd in Class 10; Rallye, Charles Davis and

Don Spaulding were 18th in the Unequipped class. Overall placing for

all events in the Parade showed Charles Davis 3rd.

Roger Chaney was presented a special citation for his many years as

PCA's National Technical Chairman.

Attending from Maverick Region were Ralph, Marge and Tina Akimoto,Roger Chaney, Charles Davis and Don Spaulding.

4

Championship AutocrossSunday, September 24, marks PCA-MR's turn at sponsoring a ChampionshipSeries Autocross. Site of the event is Forum 303, Arlington. Regis-

tration is 11:30 AM, timed events begin at 12:30. Negotiations are

currently in progress for trophy sponsorship from our friends at Green

Oaks and Forest Lane Porsche-Audi Dealerships. Trophies shall begenuine silver plates with appropriate engraving.

This event has historically been the principal source of revenue; first

aid to our Region bankroll. Our success depends on your cooperation.

Workers are currently being contacted. If you have not been contacted

and are willing to help please contact one of the chairmen following

(No experience necessary!): Eventmaster, Bob Horn; Registration, Nancy

Corbeille; Scoring, Barbara Horn; Timing, Richard Corbeille; Course

Workers, Jim Giffin; Tech Inspection, Charles Davis; Staging, JimSidwell; Public Address, Don Spaulding. Bob Horn has designed a trulychampionship type course; challenging.

Our Autocross date choice for the 1973 season depends solely upon par-

ticipation by our club; the more active, the higher our choice. So,why not enter your Porsche as long as you are already at the event as

a worker.

... and to DatePCA-MR as a club has dominated the Championship Autocross Series this

year. Individual performances have been outstanding. Participation

by our members in the series is up over last year. It's been a very

good year - and it's not over yet! Our championship event is coming

up this month. Bob -orn is Event Master and has a reputation for

design of excellent courses.

Class A Class IP-21st Jack Walker 35 pts. lst(Tie) Jim Giffin 30 pts.

3rd Don Muncy 25 pts. 3rd Bob Horn 21 pts.

Class B Class Modified1st Russ Larson 39 pts. 2nd Jim Sidwell 16 pts.

4th Jim Sidwell 22 pts.Class Ladies

Class IP-1 1st Linda Sidwell 36 pts.1st Charles Davis 43 pts. 5th Barbara Horn 14 pts.

2nd Barry Gibbs 28 pts.5th Bill George 10 pts.

5

Singing PorschesEverywhere there were Porsche cars singing their way along back

woodsy roads in search of a tune that would bring them some gold.

This was the way it was, Sunday the 27th.

It all began with Nancy and Richard Corbeille in the Forum 303 parking

lot. They were responsible for the "Bouncing Balls" that afternoon;

it was up to the Mavericks to follow them. The Rallye took the parti-

cipants into the country side where they could openerr up" and take

the banked corners "flat out". Along the way the rallyists were sup-

posed to spot pie plates with musical notes on them. If he or she was

on course, a few bars of "Theme From Romeo And Juliet" (not Love Story,Harold and Pam) became apparent on the score sheet. However, if the

Rallye team strayed off course, a mirage of sharps and flats gave the

tune an air of modern day hardrock. (Sharps, flats and whole notes,when appearing on the score sheet, denoted an offcourse excusion to

the Rallyemaster, but not apparent to the Rallyists! Ed.)

At the end of the Rallye, awaiting the tired and hoarse country sing-

ers, was a barbecue party hosted by the gracious Laughlin family of

Gary, Vivian and Daughters. The courtyard setting was typically

German with Gary's fleet of BMW's, VW, and Porsche, surrounded by some

30 other Porsches. We certainly owe our thanks to the Laughlins for

opening their house to us.

At the end of a great evening, congratulations went to the top "Sing-

ers" of the day: Charlie Davis and Barbara Smith with the most

correct notes. Following them were the duets of Roger Chaney and Don

Spaulding and Ken and Patti Kenyon. Their trophies will be awarded

at the September meeting.

This event was undoubtedly one of the highlights of the Maverick Region

1972 with 64 participants. Again our thanks to Dan Dudley, Karl

Karbach and Charles McFarland of Mountain Creek Rallye Club, for a fine

event.

Rodney Ricketts

1E48 PROTOTYPE

6

Buenos DiasI'm afraid it doesn't take much prodding to get me to any event wherefood and drink are involved, so when the get together at Joe T.

Garcia's with the Vette folks was proposed I knew right away that I'd

have to make it to this one. Although the plan to caravan to Joe T.'s

sounded like fun, the idea of driving all the way from far west Fort

Worth to Grand Prairie just to come back to Fort Worth sounded a

little crazy so I'll have to assume the caravan attracted attention.

We went straight to Joe's to discover just three other Porsches and a

pile of Corvettes. Now, we had never been to Joe T.'s before but I

already knew what to expect the neighborhood to be like (that's why we

had never been before). This time, though, we figured one little un-

obtrusive 912 wouldn't be near as enticing as a red, white and blue

Corvette or a $500 set of factory alloy wheels. Besides, there was go-

ing to be a guard, right? Wrong. At least not where we could see him

when we pulled in. Anyway, drawn ever onward by the magnetic prospect

of beer and Nachos, we proceeded to the pool area.

Surprise number one, it is really nice. I was definitely impressed

with the patio and pool area, especially after first sight of the

place. The Corvette people apparently had gotten a head start at the

bar and bodies were being flug into the pool as fast as they could be

captured. I quickly spotted an unusually dry group (water not

alcohol) and, sure enough, it was the PCA-MR contingent. We were not

immune to the baptizing disease, however, as our Prez found out upon

his arrival.

Surprise number two, rain. Not just a little rain, a lot of rain. By

this time, however, most everyone was wet anyway so it didn't much

matter. Except that when the rains came the Joe T. Garcia personnel

disappeared. Bar closed (keg was open), Nachos stopped appearing, all

J. T. folks into the house. Once again, however, our alert Presidentdemonstrated his leadership ability and pretty soon the P.C.A. crowd

was in an unattended kitchen making Nachos like Nachos should be made.

Shortly thereafter, dinner was announced and we adjourned to the din-ing room. About this time more Porsche people started appearing and

before long the turnout looked nearly even for both clubs. The food

was just as Barry had implied, it was great.

All in all, it was a good event, especially for those of us who like

to eat. Muchos Gracias to Green Oaks Porsche-Audi for the beer.

Mike Kaler

7

Rol,Some physical concepts are difficult to accept and understand. Astatement made at one of the Technical Seminars at Lake Geneva, pro-posed that one of the reasons that Porsches are often sold withoutanti-sway bar(s) is that they develop higher cornering forces thatway! The explanation was that normal street tires (even though theyare radials) tend to roll under and lift the inside edge of the con-tact patch at high cornering forces. By allowing the car to roll,the outside wheels undergo negative camber changes which results inless tire roll. The difference between a Porsche without anti-swaybars and one with them is slight, with regards to cornering forces.

This concept was apparently difficult for the audience to accept andproduced much discussion. The explanation which was next fielded wasa shocker! Most drivers can develop higher cornering forces withanti-sway bars on their Porsches: They are supposed to feel more se-cure that way. This is true of even the best drivers.

Thus the Psychological concept that your Porsche should be "set-up"so that you, the driver, can function optimally. This may result ina "funny" handling car, but if you like it, leave it that way. Yourmental condition is more important than the physical configuration ofyour Porsche.

Charles Davis

Roll OnThe presence of stabilizer bars (also called anti-sway or anti-roll

bars) in a Porsche suspension is an important element for any type ofhard driving. A stabilizer bar is a piece of steel that links thefront wheels (or rear wheels) together in such a way that when onewheel is pushed up into the fender well, the other wheel is subjectedto force in the same direction. When the left wheel moves upward, theleft arm of the stabilizer bar also moved upward, causing the bar torotate and lift the right arm. If both wheels are being deflected, asthey would be when hitting a bump, the bar has no effect. However, ifthe car is leaning as in a corner, one wheel is moving up while theother is going down. During a right hand corner, the right wheel isbeing forced downward by its spring or torsion bar and resists beingforced upward by the right arm of the stabilizer bar. This resistanceis transferred to the left wheel by the bar and decreases the degreeof body roll.

8

The purpose of stabilizer bars is twofold, to increase roll stiffness

and to permit 'chassis tuning' between the front and rear suspensions.

Roll stiffness is desirable because it causes the car to respond more

quickly to steering input. The car reaches its suspension configura-

tion for maximum cornering force sooner because it doesn't have to

roll as far. Also, increased roll stiffness keeps the car closer to

level and allows the suspension geometry to keep the maximum amount of

tire tread on the ground.

Chassis turning is the other benefit of stabilizer bars. If you

picture a car as a rectangle with a wheel at each corner, it would be

level when going straight, but when cornering, the rectangle would be

leaning with the outside wheels supporting most of the weight. Now,if

you lift the low front corner of the rectangle - the rear corner will

move down. The low front corner is effectively lifted up by increas-

ing the size of the front stabilizer. By so doing, the outside (low)

front wheel must carry an increased load but the weight distribution

between the rear wheels is made more even. Since the traction avail-

able from a pair of wheels (front or rear) decreases as the weight

distribution shifts to one side, the result of increasing the size of

the front stabilizer bar is to decrease traction in the front while

increasing traction in the rear. Exactly what you do to reduce over-

steer of a 356.

-- Torsion ber"A" crams

4 D - "eelStabilizer bar

Now, what would have happened if the rectangle had flexed? The

effect of a larger front sway bar would have been drastically reduced.

In fact, the Targa and 914 flex so easily that chassis tuning is all

but impossible in stock configuration. In addition to stiffness, a

further requirement for a tunable chassis is a predictable spring rate

or torsion bar stiffness. What I am leading up to is that the hydro-

elastic front suspension in 1969 and later 'comfort group' cars is not

suited for hard driving, much less competition. The front struts are

so unpredictable that one of our member's car went up on two wheels in

an autocross and later got dangerously close to rolling over on an

otherwise normal corner at driver's school. Several other comfort

group cars have had similar experiences. It is sad that Porsche has

produced a suspension that is unsafe under hard cornering. The normal

suspension parts can be ordered but unfortunately many sets are back

ordered for other Porsche pushers who would rather switch than roll.

9

Getting back to real Porsches, the following is presented as an em-

pirical guide to sway bar sizes based on autocross competition. Porsche

356: stock bar 16mm front only, recommend change to 19mm. Porsche 911-

912, '65-'68: 13-14mm front bar only is OK; 14-15mm front bar with 15mmrear bar; 16-17mm front with 16mm rear. Porsche 911, '69-'71 with

longer wheelbase: 12-13mm front bar only is OK; 14-15mm front with 15mm

rear; 15-16mm front with 16mm rear.

Note: The B&B 19mm rear bar is approximately equivalent to a 16mm fac-

tory bar because the arm lengths are different.

John Leonard, Potomac Region

Club PointsListed below are the collective points accumulated by each area clubthrough the 5th event (of 7). Following the club name is listed the

number of top-time-of-days, 1st places, 2nd places, 3rd places, 4th

places, 5th places/classes entered. Next the total number of points

on this basis: TTOD = 10 pts., 1st = 9 pts., 2nd = 7 pts., 3rd = 6

pts., 4th = 5 pts., 5th = 4 pts. Last is the index which is totalpoints/classes entered.

INDEXE/R 0, 14, 19, 19, 13, 10/10 468 46.8PCA-MR 5, 14, 13, 9, 4, 3/7 353 50.4MCRC 0, 7, 4, 5, 7, 2/7 164 23.8(No Club) 0, 5, 4, 6, 6, 4/8 155 19.3DSCC 0, 3, 4, 0, 4, 6/7 99 14.0SCCA 0, 4, 2, 3, 2, 5/6 93 16.3FWSCC 0, 4, 3, 1, 1, 4/4 84 21.0GSWCC 0, 0, 2, 3, 4, 3/4 64 16.0CTC 0, 3, 1, 1, 1/5 49 10.0CCT 0, 0, 2, 2, 2, 2/3 44 14.7PIRT 0, 0, 0, 1,1, 2/2 19 8.0TSD 0, 0, 1, 1, 0, 0/1 13 13.0

Being a single marque club, PCA-MR does not have entrants for the

sedan classes and a couple of sports car classes. Also, we do not

have nearly the overall participation as E/R has. However, with one

exception, in the classes in which we compete, we do extremely well as

the index shows. The one exception is Class C which should be 911

territory, but isn't. The class is composed of 240z's and Datsun 2000

cc Roadsters now. If you can't beat them, you spent $4000. too much.

Come on, 911 drivers'

Charles Davis

10

That Other CarThe people at Green Oaks Porsche-Audi recently raffled-off the use of

several Audies for a three-day test drive by PCAers. In order to re-late to the membership the reactions and opinions of the drivers of

these cars, I have conducted a survey. When asked what they liked

most about the car, the drivers said it was a very comfortable car to

drive. The exceptional handling and general body integrity seemed to

instill confidence in the driver. The car had excellent brakes and was

a good highway car giving good gas mileage.

The bad points of the car were not as well defined. Several complain-

ed of poor engine tune resulting in hard starting, stalling, rough

idle and poor performance. The rocker switches on the dash seemed

confusing because of poor placement and lack of illumination at night.

Other complaints, each mentioned by no more than one driver, were

wheel imbalance, weak shocks, seat belt and seat belt buzzer malfunc-

tion, poor instrumentation, brake noise, poor air conditioning, poor

interior lighting, hard low-speed steering, poor placement of outside

rear-view mirror and too much cheap-looking plastic used in the car.

When asked to rate several features of the car from 1-10 (1-poor, 10-excellent) the drivers rated the car as follows:

8.4 - Body integrity 6.9 - Transmission8.4 - Comfort 6.8 - Engine Starting8.2 - Seat Belt & Harness 6.7 - Acceleration

8.2 - Brakes 6.3 - Engine Response8.1 - Radio 6.1 - Tires

7.9 - Handling 6.0 - Engine Smoothness-low speed

7.2 - Engine Smoothness - 5.9 - Instrumentationhigh speed 5.8 - Lighting

7.0 - Air Conditioning

Barry Gibbs

1939RACER

11

Giant Liquidation Sale of PylonsThe Porsche Club of America, Maverick Region is going to offer two lotsof pylons for sale following Championship Autocross #6 on September24th. Other clubs, organizations or individuals wishing to purchaseany number of these pylons must submit a written bid in a sealed enve-

lope prior to the last timed run of the day. This bid should state

only the per pylon price and the pylon size, not the number of pylonsdesired. The highest bidder (for each lot) will be offered any numberof pylons from that lot up to the maximum number available. If anyare left, the next highest bidder will be offered any number of pylons.This will continue (with each lot) until either no pylons or no biddersremain. Limited quantities of pylons are available. Total quantitiesavailable are set by Maverick Region. All bids must be above the mini-

mum established price to be considered. All bidders must have a repre-sentative present for the opening of bids. Terms are cash (or check)and carry.

Lot #1

All medium size pylons (18" high) - assorted colors - black/yellow,red/yellow, & yellow/yellow. Conditions vary from good to excellent.

Minimum price $0.85 each.

Lot #2

All large size pylons (28" high)All black/yellow colors.

All excellent condition .Minimum price - $2.00 each.

For information Contact: Don Spaulding 817/738-8998or

Charles Davis 817/261-6175

Bourland AnnouncesDick Bourland, "General Manager of Forest Lane Porsche Audi (formerly

Don Miller P/A) has announced the following personnel appointments:

Pete Portman, Service Manager; Rennie Burns, New Car Sales Manager;

Ray Averitt, Used Car Sales Manager; Bill Hargis, Parts Manager; Berry

Berryman, Service Advisor; Gay Irwin, Service Advisor.

12

Coming EventsSept. 10 ER Practice Autocross - "George Parker Memorial Autocross"-

TBA.

FWSCC - Gimmick Gymkhana - Navigator required - Meiman-

Marcus, Fort Worth - 1:00 PM.

Sept. 17 GVRA - Club Races - Greenvalley Raceway.

SCCA - Solo II Autocross - Runoff - Texas Region - TBA.

Sept. 24 PCA-MR-CHAMPIONSHIP AUTOCROSS #6 - Leonards (Forum 303) -Intersection Spur 303 & Hwy. 360, Arlington. See articlein this issue.

Sept. 26 SCCA Activities Council - Texas Electric Bldg., Center &Abram, Arlington - 7:30 PM.

For further information, contact Barry Gibbs at 214/826-4786.

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