In Sunday's race last weekend at Road Atlanta one of my push rods (TR-4)
floated off to the side of its rocker and held the exhaust valve open so it
blew hot stuff out through the SU. I pulled the push rod up and straightened
it out on the only flat surface around, the tongue of my trailer.
Put it back together and the engine ran fine. So I hooked up the trailer and
drove back home (70 miles)....oil pressure and temp normal; no funny noises
and typical power.
If the compression checks normal, I plan to assume everything is just fine.
Any foreboding warnings out there?
Richard
-----Original Message-----
From: fot-bounces+tarch=bellsouth.net@autox.team.net
[mailto:fot-bounces+tarch=bellsouth.net@autox.team.net] On Behalf Of Mike
Munson
Sent: Saturday, May 10, 2008 3:40 PM
To: 'Chuck Arnold'
Cc: fot@autox.team.net
Subject: Re: [Fot] TR6 forged pistons needed
Thanks Chuck,
It sounds like you have had some trials also.
It appears that the locknut on the rocker worked loose. The tappet and
pushrod rotate in the direction that will tighten the valve adjuster which
will close up the tolerance. Then all hell breaks loose, valve head hits
piston, breaking off head then the head floats around in top of cylinder,
wreaking all sorts of havoc.
I wonder if I could mix them with my Arias if the weight and pit to deck
height is the same.
That is something to think about.
Mike
_____
From: Chuck Arnold [mailto:triosan@gmail.com]
Sent: Saturday, May 10, 2008 11:37 AM
To: Mike Munson
Cc: fot@autox.team.net
Subject: Re: [Fot] TR6 forged pistons needed
Wow, really sorry to hear of the disaster! Any idea how the valve was
"dropped"?
I think I have 4 [and for sure have two] .04 over JE forged pistons -- not
sure if you could find others to match. I sent them a stock piston a few
years ago and they made a set for me. Burned up a couple due to no oil flow
at break in and had to order a minimum of 4 more.
Chuck
On Fri, May 9, 2008 at 3:10 PM, Mike Munson <fasttrs@mindspring.com> wrote:
Hi Gang,
In a race at Indy last weekend I dropped a valve and destroyed one of my
Arias forged pistons along with the cam, head and block.
I know this is a long shot but do any of you out there have any forged
pistons or do you know a good source?
I am starting to get things together to build another engine.
Mike
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Chuck Arnold
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