All wheel drive Yours
truly can hardly wait for a test drive in the new small Jag, the X-Type.
Having owned 4 wheel drive vehicles since 1966 and recently purchased an
all wheel drive I’m a big fan of the theory that power should be applied
to the road at all times through whatever medium is available. Most of you
know that cars that race on pavement don’t need AWD to be a winner, but
that doesn’t mean that there is no advantage to it in the real world.
For the average driver and the average bumpy, off camber road with the
light dusting of sand, gravel, water or ice in the corner it can’t be
beat. I hope that Jag is going to give us the most sophisticated system
available, with automatic traction and yaw control and the option of
flipping a switch and locking all the differentials. Can’t you see
yourself high-balling it sideways at 100 mph on a muddy logging road some
moonless midnight . . . just like a Group B rally car of yore? Well, maybe
manual-locking differentials won’t really be necessary, but it would be
kinda fun!
Herr Doktor Reitzle Most of you know
that Jaguar is part of Ford’s Premier Auto Group which is headed
up by Wolfgang Reitzle, the would-be president of BMW, who jumped to Ford
after he was passed over twice for BMW’s top spot. It is Reitzle’s
goal to increase Jaguar sales to 200,000 per year, finally making Ford a
profit. The X-Type will be the major component in the algorithm that will
accomplish this. I have no doubt that the X-Type will blow the BMW 3
series into the weeds, but please, Herr Dr., if you are reading this, give
us the F-Type, and do it soon. Make it AWD, make it an aluminum monocoque,
make it a technical tour-de-force that will crush the Z-3 and the Boxster
into road kill. Remember how the E-Type took the world by storm 40 years
ago? Do it again!
Tappet guide retainers
If you have a high mileage XK engine (‘50-’87) you should really
consider installing tappet guide retainers. The steel inserts that guide
the tappet buckets in the aluminum head tend to loosen with age and heat
and if they start moving around, not only will you have a noisy engine,
you run the risk of some very expensive head damage. The retainers
themselves cost $35, but the labor to install requires drilling and
tapping the head and is best left to an expert. Al DeLong quotes $420
parts and labor. Give him a call.
Don’t top up that tank!
With gas prices and lines at the cheap stations the way they are these
days, it’s very tempting to squeeze in as much gas as possible at each
fill-up. It’s not a good idea. All modern autos have a sealed gas tank
and a vapor recovery system that catches any evaporation from the fuel
tank and directs into the intake system of the engine. If you over-fill a
tank on a cool morning, then park the car in the heat of the day without
driving it more than a few miles, the gasoline can expand so much that it
will flow up the vapor tubes to the engine, soak the vapor storage
canister and even leak out on the ground. After the second click-off the
tank is full. Unless you intend to immediately drive 50 miles, stop
pumping!
Radial engines Spent a few hours
last month at the Smithsonian Air and Space museum in D.C. while waiting
for a flight home and couldn’t help but marvel at the Pratt and Whitney
Wasp Major that powered the last of the piston engined airliners, the
DC-7. This engine, originally designed in the 30’s, produced as much as
4500 hp, and used such sophisticated technology as turbo and supercharging
(dreaming about Group B rally cars again), water-alcohol injection under
maximum boost and an elaborate gear reduction system to keep the tips of
the humungous props from exceeding the speed of sound. It had 28 cylinders
and displaced 4360 cu.in. The most intriguing aspect of the engine to me
is the radial layout. The crank is so compact, and the overall volume of
the engine so small considering it’s displacement, that it makes you
wonder why all automobiles aren’t powered by radial engines. Just lie
the engine flat under the rear seat and apply a right angle gear drive
(the prop reduction gearing could be used this way). 5 cylinders should do
it, although luxury models might have as may as 15. With direction fuel
injection and a camless valve activation system you would end up with a
piston engine that rivaled the Wankel rotary for compactness and light
weight per displacement. Are you listening Herr Dr? If you’d like to
learn more about the P-W Wasp Major checkout google.com
Key words are "Pratt Whitney Wasp"
Setright on Jag quality
L.J.K. Setright recently held forth in the Pilgrimages
supplement to Automobile Magazine on the history and present state
of Jaguar. The man has a nice way with the prose, but technically he ranks
with Tom McCahill. Particularly erroneous where his comments on Jaguar
handling dynamics and quality control. If you haven’t read it and would
like me to send you a copy, just e-mail me. The man’s license to write
should be restricted to FICTION.
Recycling Plastics Got myself in a
little hot water recently when I stated that plastics weren’t really
recyclable. I’d like to defend myself. Yes, some plastics can be ground
up, melted, and turned into other plastic products like synthetic deck
boards and polyester jackets. BUT those products cannot be recycled. To me
the term recyclable means that the raw material can be used over
and over again. The only materials that I can think of that meet this
criterion are water, glass and metals. The steel in your new Jaguar may
well have had a previous life in a Ford Anglia, or even a Boer War sabre!
It could have future lives in the cars or buildings of the 22nd
century, assuming you don’t let it turn into rust. Paper isn’t really
recyclable. Each time the paper is ground up and bleached the wood fibers
get shorter and weaker. Eventually, after 3 or 4 rounds, they aren’t
even good enough for the cheapest newsprint. Metals can go on forever with
no degradation in quality and the energy savings are enormous. You
probably know that recycled aluminum can be made for 10% of the energy it
takes to manufacture aluminum from bauxite ore. The push is on to make
cars lighter. Plastics are being touted as the answer. Check out www.sae.org
and their online magazine for the past month. The plastic content of cars
will double in the next 5 years. Will these plastics be truly recyclable?
I doubt it. If you would like more info on plastics and recycling a good
place to start is EBSCHost, available at your local library. It’s
the online Periodic Guide to Literature. You can find a reprint
from Earth Island Journal, Fall ’96, "7 Myths of
‘Recycled’ Plastics". Read it.
Engine storage stand In the
accompanying photos you will see an engine stand that I whipped up out of
$10 of scrap steel in about an hour. The side view demonstrates the basic
principle. The engine is balanced over its center of gravity. The
attachment to the lower rail is as far behind the center of the engine as
the mount is ahead. I used 2 in. eighth wall tubing and low hydrogen stick
for the welds. This is a great way to carry an engine in the back of a
truck or on a trailer. No danger of denting or cracking the pan. You can
add wheels. I did, and that old V-12 rolls neatly under an XK that sits on
a conventional three-wheeled engine stand. When the stands aren’t in use
they take up minimal space in the garage.
click on the links to see
pictures
Engine
Stand
Balanced Over CG
Toe In Gauge
Upright Detail
Toe-in gauge Everytime I work on the
steering of one of my Jags it costs me $35 to get the toe-in accurately
set. So I made a simple, universal toe-in gauge based on one that I used
back in the 60’s. It may not be quite as accurate as the laser systems
of today, but it’s good enough for street use. The photos are pretty
self-explanatory. The upright bases are 2 in. square tube, the uprights 1
¼ in angle, the cross tube is 1 ½ in. square tubing. If I had to make
another I would use heavy wall tube (1/4 in.) for the upright bases and
just tap for the locking bolts instead of brazing nuts on. Use grade 8
bolts or you run the risk of stripping the threads. Each slotted upright
has a 5/16th bolt with a point ground on its end. To use the
gauge I jack each wheel off the ground and spin the tire so that a roller
tip pen makes a thin line all the way around (it doesn’t show well in
the photos, but there is an L-bracket to hold the pen steady). The
pointers are lined up on that line and compared front and rear at a height
equal to the axle until the toe-in is correct, usually about 1/8 in. max.
The car must be on the ground and rolled back and forth at least 4 feet to
be sure the suspension has taken a proper road set. I made both uprights
removable for compact storage. You could attach one solidly, making the
fabrication easier. This gauge can be built without welding. Just bolt the
uprights solidly to the sleeves with a couple of carriage bolts. Total
cost of materials is about $15.
Leaking carbs If your Jag has HD S.U.
carbs you should replace the main jets as a preventative measure. The jets
are about $18 each at XK’s Unlimited and a few hours work will
get them installed. The modern crap that passes for gas will make short
work of the old rubber diaphragms that allow richening of the mixture when
you pull the "choke". Someday when you are on one of Roger’s
high-speed tours you will stop and see a big puddle of gas under the car.
Maybe you will be so unlucky as to have the gas ignite! New jets are cheap
insurance. If your main jets have been replaced in the recent past the
rubber will be green or blue in color instead of the original black
Rack bushings You’ve probably
heard that replacing the stock rack bushings on an XJ with polyurethane
will improve the road feel and accuracy of the steering. True, and you
probably won’t notice the difference in harshness. The stock bushings
tend to deteriorate quickly if any oil leaks on them. Poly bushings are
available from XK’s for about $25. What the pundits don’t tell
you is that you have to remove the rack from the car and use a press to
get the old bushings out. Harbor Freight Salvage (www.harborfreight.com)
sells a crude 12-ton press for $99 that will do a lot of pressing work if
you’re a little patient and a bit ingenious.
Old wiring and new headaches Some of
you know that our esteemed publisher, Bill McGraw has been perplexed by an
electrical problem on his E-Type for the past few months. The alternator
wanted to charge at maximum no matter how well charged the battery was.
Bill checked all the connections, measured the voltage to see if the
voltmeter might be telling a fib (it wasn’t) and replaced the regulator.
The problem persisted???? Bill finally solved the problem. In rechecking
the spade connections at the alternator one of the wires came off in his
hand, spade still attached to the alternator. Seems the copper strands had
parted company inside the insulation, making it impossible for the
regulator to do its job.