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- From: neal@cmptrc.lonestar.org (Neal Howard)
- Subject: Re: Freewheeling Engines
- Message-ID: <BzMyts.Czn@cmptrc.lonestar.org>
- Sender: neal@cmptrc.lonestar.org
- Date: Tue, 22 Dec 1992 01:01:03 GMT
- Distribution: na
- Organization: CompuTrac Inc., Richardson TX
- Lines: 23
-
- In article <1992Dec18.143800.9476@mcnc.org> brooks@mcnc.org (Ted Brooks) writes:
- >I would recommend changing the timing chain & gears at about 100k if you
- >have a nylon tooth gear. Change over to a steel gear, and you'll probably
- >never have any more trouble.
-
- Even steel timing gears on an classic designed OHV American V-8 is no guarantee
- against breakage or slippage. I once had a catastrophic chain/gear failure in
- a Ford 460 that had about 25,000 miles after a major rebuild. The cause: revving
- the engine in neutral very high (to make a lot of racket from the pipes to
- impress a girl with my big bad engine) and apparently the valves floated enough
- to hit the piston tops and resulted in a busted timing chain, a few teeth
- stripped off a solid steel cam gear, a few bent valves, and some small nicks
- in the tops of some of the pistons..... and no, a Ford 429/460 isn't a free-
- wheeling engine, especially when you have a Sig Erson cam with ~.570 lift and
- high compression TRW pistons :-(. The steel sprocket is definitely the way
- to go , though.
- --
- =============================================================================
- Neal Howard '91 XLH-1200 DoD #686 CompuTrac, Inc (Richardson, TX)
- doh #0000001200
- "Let us learn to dream, gentlemen, and then perhaps
- we shall learn the truth." -- August Kekule' (1890)
- =============================================================================
-