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- Newsgroups: rec.autos
- Path: sparky!uunet!munnari.oz.au!titan!root
- From: c.oneill@trl.oz.au (Chris O'Neill)
- Subject: Re: Why is US engine technology so retrograde?
- Message-ID: <1993Jan22.043900.12684@trl.oz.au>
- Sender: root@trl.oz.au (System PRIVILEGED Account)
- Organization: Telecom Australia Research Laboratories
- References: <1993Jan8.155432.21223@mtu.edu> <C0vL2J.FxL@news.cso.uiuc.edu> <1993Jan15.173353.16295@newsgate.sps.mot.com> <1993Jan20.020324.8083@en.ecn.purdue.edu>
- Date: Fri, 22 Jan 1993 04:39:00 GMT
- Lines: 61
-
- In article <1993Jan20.020324.8083@en.ecn.purdue.edu> surge@en.ecn.purdue.edu
- (PhD-in-Training) writes:
- >In article <1993Jan15.173353.16295@newsgate.sps.mot.com>
- mark@wdcwdc.sps.mot.com (Mark Shaw) writes:
- >>One recurring theme appears in this thread: Larger engines are more
- durable.
- >>Sounds like an old adage that's long past it value.
- >
- >>Enough of this big block durability fable.
- >>It may have been true in the past, but it doesn't cut it today.
- >
- >Hmm, although I am tempted to agree with the poster, I can not
- >think of reasons why this would be so.
-
- I think the fable was that big blocks were durable AND fours were not, the
- fours were not part being the important point. Mark Shaw emphasised the wrong
- part of the fable.
-
- >Are smaller engines machined
- >more precisely today while larger engines are not? Have their
- >been technology improvements that benefit only smaller engines?
- >
- >Clearly, there are a host of things that benefit all modern
- >engines. Chief among them are modern electronic ignition system -->
- >engine mangement, and fuel injection. Generally, the old engines of the 60s
- >did not have these advantages. I think modern engine management
- >systems with knock sensors that can deliver accurate fuel/air and
- >timing have a significant affect on the longer life of today's
- >smaller engines.
-
- >Also people are changing their oil much more frequently.
-
- What! They should have changed it at least as frequently in the past as they
- do now. I saw a manual for an early sixties car that specified a change
- interval of 1500 miles (although there was no oil filter). The same
- manufacturer now specifies 6000 mile change intervals for its new cars.
-
- >But aren't today's large displacement V-8s a benefactor of all
- >this technnology as well? I think there can be no dispute that a
- >V-8 is working a lot less harder than a four. Seems to me if you
- >change the oil every 3K miles on your modern small-block V-8, it
- >should last close to 200K miles easy.
-
- A similarly maintained four should last close to 200K miles as well and an
- equally well made V-8 should I guess last close to 400K miles.
-
- >Perhaps this is too long
- >for most people and thus is not a real benefit.
-
- This may be the important point. If it lasts longer than 200K miles then what
- advantage is there in getting it to last even longer at the expense of using
- more petrol.
-
- >Anyone know?
-
- >(Anyone care? 8^)
-
- Yup, do you care if it lasts longer than 200K miles?
-
- Chris O'Neill
-
-