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>>>>Installation of a dual exhaust system will have no effect on engine braking. Engine braking in a gasoline engine results from the retarding effect of compression on the compression stroke and a similar retarding effect of restricting intake of air on the intake stroke. Yes, Installing dual exhaust on my car
didn't change engine braking a bit. I've noticed that an engine with a higher
compression ratio has better engine braking. A higher axle ratio that
makes the engine turn faster will make the engine brake better too. The 10.5 to
1 compression ratio Pontiac we had almost put you through the windshield when
you threw it in a lower gear to slow down. The 8 to 1 ratio Chrysler I have is
pitiful by comparision.
>>>>I hate to rain on your enthusiasm but if you can find old back issues of Trailer Life or some of the other RV industry magazines of the '60s and review the test reports, I think you'll find that the carbureted gas engines of the day typically returned around 10 mpg empty and 6 or 8 mpg towing You talkin' trucks here? My 1968 Dodge car
(with 318 engine) seems to get 17 to 18 MPG solo and 12 to 13 MPG towing
the Airstream. The 1973 wagon I have (with the 440 engine) gets 14
to 15 MPG solo and 10 MPG towing. My Dad's 1988 Suburban (fuel injected) gets 8
MPG solo and 7 MPG towing. Some engines were thirstier than others!
MARC WEIMER
Punxsutawney, PA - Home of the Groundhog #15767 1963 Globe Trotter 1971 Globe Trotter http://users.penn.com/~mweimer/weimer.html |