Re:[T3] Bugpack Dual Zoom

["Martinez, Leon" <martinezl@ftscpac.navy.mil>]

I have a set of bugpack dual zoom with header. I did not like the way
the paint burned off in 3 days of driving so I am in the process of
applying very expensive special paint that can take 2500 degrees
(from JC Whitney), I hope this looks good. These header pipes get
very hot and always burn off my gaskets even metal impregnated
gaskets, I always end up with a metal screen with no asbestos. I am 
installing thick copper header gaskets from bugpack. I have had great luck 
with copper header gaskets with my Detroit monster. I have always had 
nuts and bolts loosening under heat expansion and gasket thinning from 
heat, loctite does not work for me, it just disappears under extreme heat so
I found a high heat alternative. I am using muffler patch compound. After
I tighen nuts and bolts I apply it to the OUTSIDE with just a tad. To the 
header clamps, I gob and blob it on til can't see any seams or possible
exhaust routes. This stuff is easily removed by banging with screw driver
or another hard tool. The stuff dries like hard fine cement that takes the 
heat of ceramic. I also applied this stuff on the outside insulator cover of
my heaters including sheetmetal seams before painting. This stuff always
worked for me on clean on rusted surfaces.

Damn, I got way off the subject. Back to the dual zooms. I think this setup
is quite noisy but very effective if you have the ground clearance in bad
roads
or little ground clearance and good roads. If you have the worst of both
worlds,
you can tear off or at least bend them out if you don't have the support
brackets. You can damage stuff in bad conditions, I broke the support 
brackets off  (will reweld) better the brackets than the muffler. The noise
problem can be corrected and mellowed out using conservative resonator
tips a tiney smaller or a tiney bigger than the pipe outlet you have on the
muffler. They must be welded on to be effective. I have found too big
a resonator will not bring the loudness down at all and too small may
create unwanted backpressure at high speeds but create more torque at
the lower end, very quiet though (I welded the standard vw tweety bird tips)
but not good for me. I settled for just a wee bit smaller and the sound went
mellow and low, no loud unconfortable noises, can hear low music and
low volume conversation. I invested on this experiment when I had old
heavily corroded system my new one is three months old and I will buy
and install two resonator tips because my mom has been complaining
alot about the noise (I am her ride to work). A non annoying exhaust system
is a good thing. In case you are wondering "what are resonator tips?", they
are like little mufflers in the shape of pipes similiar to the original VW 
pipe mufflers that sound like "tweety birds" but are fatter , cooler looking
and will make your system look and sound more impressive. On the inside
they are either lavoured (spelling?) or have many holes punched in them
behind the holes you can see fiberglass, that is why some times they 
are called glasspacked tips. All our catalogs have a variety of these and
various outlet stores carry these including JC Whitney. Monza
brand is pretty common but not the only one. The ones I have I bought in 
Mexico off the side of the road at one of the many side car assesory
markets,
(very common) my tips had no brand name or country of origin but worked.


LEON MARTINEZ
martinezl@ftscpac.navy.mil

1969 SQUAREBACK EFI/AUTO
SAN DIEGO AND TIJUANA
 

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