IML: MARINE FYI

[sosmi@xxxxxxxxxxx]

For those, that like to read for enjoyment, this might be interesting. Chrysler did some significant things, when they had the "PREMIERE", marine engines. I won't cover the Hemi  motors, but the same care and technology, was involved. In the 60's they had the 383,413, 426, 440 engines. Many 413,  426 ,and 440's engines, had single, and dual 4bbl carbs.(6-PACK'S on some)The strange thing was, after so many years of hydraulic lifters, many mid 60's marines had solid lifters. And most were based on HI-PERFORMANCE auto engines.Chrysler chose to rate all their engines, below the other manufactures RPM ratings.Usually 4000 rpm.This gave them the PREMIERE rating, and these engines were used in some of the most expensive boats that could be bought, at the time.I sold my last new 440 marine engine, in 1986. Surely a sad day. Ya'll have a nice day, Dave

 

> -------------- Original message -------------- 
> From: Kenyon Wills <imperialist1960@xxxxxxxxx> 
>
> > 
> > --- pnkmoore@xxxxxxxxxxxxx wrote: 
> > 
> > > I'm curious to know what it 
> > > means for an engine to have "small duration" as 
> > > referred to by Roger and/or Gabby. 
> > 
> > Others will add, but what it means to me is that the 
> > cam, which is responsible for bumping open the 
> > spring-loaded valves, opens them for a shorter 
> > duration of time, thereby allowing less fuel/air into 
> > each cycle and yeilding a more fuel-efficient engine 
> > that is more durable, as an industrial or marine 
> > engine might be. 
> > 
> > 
> > 
> > The engine that is an industrial or marine engine is 
> > obviously not a car engine in its expected 
> > application, and will likely operate at a co
> nsistent 
> > speed, so it has different needs/designs than a car 
> > engine. Taking a boat out to an island or running a 
> > welder/cement mixer will result in a very constant RPM 
> > demand over time, and not the stop & go 
> > acceleration-oriented stuff that you get in a vehicle. 
> > 
> > One important parameter for such an engine might be 
> > comparative fuel efficiency at the expense of torque 
> > or HP at RPM that it is not expected to operate at. 
> > 
> > -By inserting a different cam into an engine that had 
> > already been developed, Chrysler and other companies 
> > are able to broaden their offerings without totally 
> > reinventing their products. 
> > 
> > -Kenyon 
> > 
> > 
> > 
> > ________________________________________________________________________________ 
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