We have had some piston scuffing problems in TR-4 engines with "billet" rods
that do not squuirt oil onto the cylinders. These problems have only
happened whrn the engines were being run at very low rpm, ie, under 2,000
rpm. It turned out that not enough oil was being thrown up on the cylinder
walls. These scuffing incidents occured when idling around the pits, driving
the car on the street and idling around a parking lot, and when starting the
car and idling in a garage. It happened 3 separate times in the same engine.
Drilling the rods to that oil was squirted onto the thrust side of the
cylinder wall once each revolution of the engine cured the problem!
There is not a cam lube problem. Anything regarding the cam is probably
a separate issue.
Greg Solow
----- Original Message -----
From: <rikrock@aol.com>
To: <John.Reed@wilson.com>; <fot@autox.team.net>
Sent: Friday, November 16, 2007 12:56 PM
Subject: Re: [Fot] Crank Scrapers and Cam Lubrication
> So, you guys are saying that there is no downside to using a crank scraper
> in a wet-liner motor? That even with connecting rods that don't have the
> little oil hole like the stock rods do, enough oil gets?to the cylinder
> walls?? And that enough oil gets everywhere it needs to get, all the time?
>
> Rich Rock
>
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