Jim:
I completely overhauled my motor for less than $2,000 which
included raising the compression, a cam, 3 angle valve job, porting the
heads and K&N air filters (stock exhaust, however). I estimate 140HP
with a good idle and good mileage. The downside is that this is hardly
"bolt on". The upside is that I got a complete engine rebuild out of the
deal, corrected a boffed head gasket installation, and replaced the cam
which had a flat lobe.
I would say your motor needs to be in good condition for this to
work well. Compression needs to be good in all cylinders, your cooling
system needs to be up to snuff, etc. Adding a blower to a tired motor
may well push it over the edge. In particular, check to make sure your
cam is giving you the correct valve lift on all the cylinders - it is
not uncommon to lose a lobe on the camshaft.
As for the detonation, recall that the later motors had a paltry
7.75:1 compression, which is perfect for supercharging. 6 lbs of boost
is nothing for an engine with that low of a compression ratio. The only
fly in the ointment is that you would like a cam with wider lobe centers
(112 to 114 degrees) to really take advantage of the boost. The stock
cam is set up for natural aspiration, so the lobes are a tad too tight
for a blower. Change the cam and 10 lbs of boost would be reasonable.
Hoo-yah!
Vance
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
Behalf Of Jim Jones
Sent: June 18, 2006 6:55 PM
To: 6pack@autox.team.net
Subject: Moss supercharger
<snip>
At first I gulped at the $3500 price tag, but after considering what
it would cost to increase performance by more traditional means (head
grind and porting, new valves, cam, new valve springs, lifters, more
carbs, exhaust system, etc.) the price almost seems reasonable. For
people like me who don't have All The Tools In The World, this could be
halfway doable.
The first question that came to my mind was what kind of burden would
this put on the cooling system? In an article in the magazine by Robert
Goldman, it was said that cooling wasn't an issue in their test mule,
even in 90 degree plus weather. He states it's because the blower
delivers the mixture more evenly to each cylinder and with greater
efficiency. Somehow that doesn't seem right when you're pushing six
pounds of boost into the cylinders. I can almost hear the detonation! I
know that some people on this list have fitted blowers to their cars.
Does this jibe with your experience?
Don't want to start an argument - just think this something of
interest to many of us.
JIm
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