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- Path: sparky!uunet!spool.mu.edu!agate!ames!sun-barr!rutgers!concert!samba!usenet
- From: Harry.Johnson@launchpad.unc.edu (Harry Johnson)
- Newsgroups: rec.autos.tech
- Subject: Mopar 360 V-8 question
- Message-ID: <1992Dec21.170131.23484@samba.oit.unc.edu>
- Date: 21 Dec 92 17:01:31 GMT
- Sender: usenet@samba.oit.unc.edu
- Organization: University of North Carolina Extended Bulletin Board Service
- Lines: 34
- Nntp-Posting-Host: lambada.oit.unc.edu
-
-
- I recently bought a very large vehicle equipped with the Chrysler 360 V-8.
- My 1-ton Tradesman van doesn't have much original about it, but the engine
- and transmission are strong and (so far) dependable.
-
- I kind of have the willies about driving the van at highway speeds,
- though. I don't know what a reasonable top running speed for prolonged
- (120 miles or more) trips is and don't want to wear out the engine really
- fast. I have rather arbitrarily set a limit for myself of 2700-2800 rpm
- for continuous freeway driving.
-
- Do you think that this is a reasonable speed at which to run this engine?
- Am I underestimating the durability of the engine at high speeds (i.e.,
- could I run at 3500 rpm without problems)? Am I really saving any wear
- and tear with this sort of limit? The engine has good oil pressure and I
- tuned it up immediately after buying it, and I'm not worried about
- overloading the cooling system or knocking/pinging problems.
-
- On a more general front, what is the best speed at which to run an engine
- so that it lasts the longest possible? 50% of redline? Idle? By lasting
- the longest, I don't mean time-wise but rather number of rotations of
- crankshaft before some sort of rod/crank/valvetrain failure. (If running
- my engine at higher speeds causes it to fail after 10^8 rotations rather
- than 10^9 at some lower speed, I would rather run it at the lower speed
- since I could drive farther, albeit slower, at the lower speed. However,
- if the reverse were true, I'd really be a dope to drive slower while
- wearing out my engine faster.)
-
- Harry
- --
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