[Healeys] *** SPAM *** Re: Lightened Flywheels

Reinhart Rosner reinhart.rosner at aon.at
Tue Jun 18 14:24:24 MDT 2024


Run-on: My mechanic told me to use fuel with 98 octane (instead of 95) and if it still happens to step on the gas pedal when shutting down the engine. This works good for me. 

Reinhart

 

Reinhart Rosner

55 100 BN 1

Vienna - Austria

 

Von: Healeys [mailto:healeys-bounces at autox.team.net] Im Auftrag von Hank Leach via Healeys
Gesendet: Dienstag, 18. Juni 2024 20:11
An: Bob Spidell; Healeys
Betreff: *** SPAM *** Re: [Healeys] Lightened Flywheels

 

The best way to stop run on is foot on brake, car in gear-It's not hurting anything and is recommended by the likes of Geoff Healey and others. Denotation has a worse effect on the engine.

The downside of the lightened flywheel is a heavier clutch engagement. That said the heaviest part I ever picked up is a 100 flywheel.  Egad, what a hunk of metal!
-However the issues with the flywheel/cracked crankshaft can be traced to a lack of a front pulley dampener and that might be the better solution to the issue.  It may in fact make dumping the clutch easier on the drivetrain, but not proven. Since your problem is with the front of the engine, I would address the seal replacement -felt if you are a purest -or yes, the modern solution fancy cover to stop drips on the floor. I collect my Healey oil in a small swimming pool I constructed to hold leaks, while in storage. Then some kerosene quickly cleans up the mess when the car is moved. Since they no longer oil the roadways, think of the benifit you are supplying to the asphalt in longer life. Hank------------------- 

From: "Bob Spidell" <bspidell at comcast.net> 
To: "Healeys" <healeys at autox.team.net> 
Sent: June 18, 2024 at 10:03 AM PDT 
Subject: [Healeys] Lightened Flywheels 
Listers,
I know this one has been discussed--well, beat to death--but it looks like I'll have to pull my BJ8's gearbox/OD to replace a leaky front seal, so I'm thinking of installing a lightened flywheel while I'm at it. My main reason for considering it is to stop some pretty significant run-on ('dieseling,' which I get on my BN2 as well). I'm not totally comfortable with dropping the clutch in gear to stop it, and any performance improvements would be a plus. It just so happens I just caught an episode of 'Engine Masters' on MotorTrend TV, where they seriously reduced the rotating mass of an engine--an SBC, which is what they mostly do--and got some interesting results: more HP and torque, as measured on a topnotch dyno. The gains were shown primarily on acceleration which, intuitively I suppose, were greater when RPM was raised at 300RPM/minute vs. 600. Any constant speed increases weren't addressed as far as I could tell. The late, great Gary Andersen, who raced, said the main benefit was faster spin-up for rev-matching downshifts; anyone noted any other significant benefits? The 'Dyno Master' on EM said he'd seen timing chain failures with lightened flywheels; my main concern for both my Healeys has been reliability, with minimal maintenance required, but if it stops/minimizes the run-on I'd be happy. Anyone know how far you can go lightening without adverse effects? TIA, Bob 

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