Roberto, poor spark could produce the kind of power loss under load that
you experienced. If your car's ignition system is anything like that on
the M130 engines that came to the States, you should consider upgrading
it to a Pertronix electronic ignition system.
See www.pertronix.com. Some M130 distributors can accommodate a stock
Pertronix trigger unit, but they may require that you ship them your
distributor for a custom installation.
Russ Maki
Ixonia, Wis.
Roberto wrote:
No power up hill
--------------------------------------------------------------------------------
Hello MB lovers
I would like to take advantage to introduce my self as well as post my
first question.
I live in Venezuela and I am a proud owner of a 1972 W108 280S that
will be a full restoration project in a few years, the car was in good
generaly conditions when I bought it few years back but after and
overheating I decided to rebuild the engine, it is a M130 that I just
finished, rebored cylinders to 0.75mm over size with a linnig in the
cylinder #4, new 0.25mm over size cam and crankshaft bearings, new
vavle guides and the seats was resurfaced as well as the head.
I started the engine set the timing in 10° BTDC, dwell at 39° and ran
it for 20minutes at 2000 rpm, after that the car has logged about 200
miles in short runs near home, the temperature always around 176° (200
in traffic with out electric fan) and the oil pressure 43 psi (3 bar).
Since I have been testing the car in flat terrain and city conditions
maybe I did not be aware before but yesterday I had to take a humongus
steped hill and when I said huge is true the road is about 1 mile long
and the inclination must be more than 30°.
The point is the car started to climb well but a soon the climb became
harder I noticed lost of power to the point that I had to put the
transmission in 1 in order to made the top since there is no way to
return before.
Another thing I noticed was a high gas comsuption during this climb,
the onlly thing i ddi not mention before is that the transmission slip
in reverse and the pressure modulator vavle is leaking a little
besides that there is nothing abnormal to report.
What do you guys think could be wrong here, I will perform a new
compression test in order to compare, the one I did before wasa round
165 psi all around.
Thanks for your patient and waiting for your thougths about.
Roberto Alvarado
1958 VW Karmann Ghia (project)
1965 VW Beetle
1972 MB W108 280S
1977 VW Westfalia camper
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