[Fot] leakdown tester, follow-on question

[Bill Babcock]

Nope, sounds like a lot of work. What are you getting at--you think  
the sleeves are wiggly? You're right. As I think Joe discovered when  
he was looking into restoring cylinders, you need a torque plate to  
bore or hone them. Even then, nothing says that the clamping pressure  
is the same, or that they distort evenly, or that heat cycles don't  
have a big effect (they do). I don't know how much it matters. But I  
do know that if you can keep a TR motor from sticking or overheating  
for the first four or five events, then the engine gets "happy" and  
lasts a long time. Purely subjective information, I know, but the  
motor in Peyote has more than 15 events--that's probably 50  
practices, qualifiers, races and warmups. It's a very happy motor and  
I'm loathe to tear it down. It's got less than six percent leakdown  
on all four cylinders.

On Sep 26, 2007, at 10:29 AM, Jack W. Drews wrote:

> The "normal" way to do this test is to set the piston at top dead
> center. But if you take the rocker assembly loose, then all the
> valves are closed. Doing it this way, cam position is eliminated as a
> factor. Then, has anybody checked leakdown in a TR wet sleeve engine
> at, say, top, half stroke, and bottom of stroke?
>
> uncle jack
>
>
>
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