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I'm confused here. These heads come in an EFI version with the threaded
hole, but the hole is too big for our
sensor? Or is the boss cast in and left blank, so that you can drill and tap
it yourself? What's the price
on a regular head? How about an EFI head? (with valves, etc and bare?) Or is
there a web site that
covers all this?
Jim Adney
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Jim,
The cost is the same for the EFI or carb head , it seems that the carb head
uses
larger valves than the EFI head. My EFI head has tiny exhaust valves with
stumpy
(thick) valve stems. both have the EFI bosses casted in them but the EFI one
has
the boss threaded way too big for the sensor that the type 3 uses. The new
type one
engine manufactured in Mexico uses an advance type of EFI that uses a bigger
head temp sensor. Best to buy the carb type head and tap the boss for your
sensor requirement. Both castings are the same.
The Bug patch sells the head for 110.00 dollars . It seems that the middle
man
for these guys work larger valves into these heads and the work is of good
quality.
The owner of this establishment takes pride on what he sells and works on.
His site is below with prices and all. Make sure you are getting a Genuine
VW
Mexican head because he also sells Autolinea/CB from Brazil . I have been to
his shop
and he is good people, give him a call with requests. Like I said the new
Mexican
heads this gentleman sells have been enhanced with larger valves as it would
seem,
I did not buy these because I wanted to see what was actually factory for my
version of durability. Real professional Baja racers swear to the
reliability and quality of
these Mexican heads. This place is local to me .
http://www.thebugpatch.com/
I bought my head for 150 dollars from the VW dealership in Mexico, it cost
this much
because it was a dearship. Beetlemex sells the same unmodified factory VW
head for
100 dollars but it is a Bare head with no valves/springs and keepers. The
gentleman that
I spoke to can sell the correct original hardware for the head but did not
specify the
price because no one has ever asked for the original hardware, customers
use the
bare head as a blank slate to machine in bigger valves and stronger springs
.
The reason I believe the factory stock setup is better for me or people who
are similarly
destructive is because the smaller valves and seats gather and lose heat
faster , especially
at the exhaust valve area, it is harder to cool off a bigger block of metal
than the smaller
block of metal, same goes with the valves, the head looks and weighs the
same as
the stock heads you are familiar with but careful inspection, will show that
these are different
castings, engineers at VW changed that for a reason.
To some of you, the tiny valves look like they belong on a lawn mower. The
space between
both valves and the space between the plug hole and seats is relatively huge
(1/2 to 1 inch) compared
to performance heads or even stock German ones, this seems to have been done
to prevent
cracking under high temperatures and load , remember these go on cars in
Mexico City
(above 10,000 feet elev.) many hills and big families. The bugs are also
used for delivery
companies, taxis, police cars, security etc... if you ever seen a picture or
a video of
Mexico city , you will notice that at least 15 to 20 percent in the picture
are VW Bugs.
The cars are also used in areas where I used to live, the temps routinely
got to
120 degrees while my buddies and I where either packed in a Bug or a
Brazilia on our
way to the beach. My buddies never had a problem with their cars, my jeep
always broke down in
that hot weather but their cars always kept going. This may be due to the
head design.
On the outside, the casting shows smaller breathing runnners but big holes
for
fresh fan air to flow through and cool the exhaust area. the smaller runner
breathing may have
been compensated by eliminating the casted in valve guide bosses and
shortening the stock
valve guide.
All out drag racers or big breathing type performance folks may not like the
smaller
(limited) runner design but others may prefer durability with good
performance. Most
performance heads have traded long life reliability for speed/power . The
head I have
runs way below standard operating temperatures that Baja bug guys told me it
should be in
during desert offroad driving. runs about 75 degrees below their operating
temps of 350 degrees.
Big bore engines may benefit with these better cooling heads.
Check Beetlemex out, they have lots of good stuff for bugs that can be used
in
our cars for example , cases , longblocks , seatbelts all made by VW of
Mexico.
http://www.btlmex.com/store.asp
http://www.btlmex.com/product.asp?0=201&1=210&3=54
Beetlemex, Inc., (DBA Btlmex, Inc.),
441 N. Grand Ave. Suite 7-350,
Nogales, Arizona 85621
Toll Free Tel. (888) 384-2814
Fax and Voicemail: (309) 216-4650
Offices in Mexico: 011-52-(662) 210-7878
E-Mail: Sales@btlmex.com <mailto:sales@btlmex.com>
http://www.thebugpatch.com/
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