Supercharging (was RE: Low compression engines)

["Gary H." <62to65mopar@xxxxxxxxxxx>]

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This discussion got me thinking about supercharging a motor in a '62 to 
'65 Mopar.

"The main advantage of the supercharger is that it allows for a moderate 
compression level during normal driving while allowing for very high 
compression levels when needed. Obviously a high compression motor of 
about 14:1 makes a lot of power, but it would never survive daily 
driving. A lower compression motor is great for daily driving, but 
greatly reduces the potential for power. The supercharger allows for 
higher compression levels than could be used without a supercharger, 
while still offering the benifits of a standard compression motor. Many 
street supercharged systems will go beyond 18:1 effective compression 
under boost. Under race conditions, many supercharged race motors will 
go well beyond 22:1 effective compression. Both of these levels are far 
beyond what could be done reliably or cost effectively without a 
supercharger." 
http://www.drkside.com/perf_super.htm

I've seen a supercharged '65 B in person, and pictures of a couple 
supercharged \6 cars.

There's a Web page overview of supercharging on
http://www.gearheadracing.com/Reference/SuperChargers/Supercharging-BeyondtheBasics.htm


But if you want the "shadetree approach" some guys "down under" are 
developing a funky system called "negative pressure supercharging" that 
makes a good read.
http://www.impulsengine.com/simpleparts.htm
http://www.impulsengine.com/diagram.htm 

The links below detail an actual "case study" of a guy's 'adventure' of 
putting an intercooled centrifugal supercharger on a Mopar big block 
engine with a mild cam and fully programmable sequential multi-point 
fuel injection system:
http://users.anet.com/~sdurr/efis1.html - Phase 1  
http://users.anet.com/~sdurr/efis11.html - Phase 2 (engine explodes)
http://users.anet.com/~sdurr/efis18.html -- Phase 3 (engine blows up 
again)

Despite setbacks, I'll give the guy a lot of credit. He keeps trying! :) 


Gary H.

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