[Fot] 87mm liner needed

[Larry Young]

I've had this happen more than once. My last problem was with #3 not #4. 
I always add at least 0.001 to the recommended clearance. If I remember 
correctly, Wiseco recommends 0.003 for the 87mm and 0.004 for the 89mm.  
I use 0.005 for both and always check it by sliding an 0.005 feeler 
gauge in next to the fat part of the piston. Did you check to make sure 
the piston skirt was not collapsed?
Larry

Henry Frye wrote:
> Many thanks to Joe Boruch, I am all set partswise.
>
> Interesting follow-up, I brought the offending liner and piston to my machine
> shop and they said I overheated that jug. The piston had a black spot 90
> degrees from the crankpin, halfway up the skirt that matched the grooves in
> the liner. The opposite side of the piston showed a little scuffing, but no
> metal transfer yet. That is the area of the piston that expands the most when
> hot. Apparently, I was running insufficient piston to cylinder wall
> clearance.
>
> Here's the kicker, this happened to the front cylinder, number 1, closest to
> the water pump. The last place I would expect to overheat a jug.
>
> So we are going to open up the piston to wall clearance some more across the
> board...
>
> -----Original Message-----
> From: Henry Frye
> Subject: [Fot] 87mm liner needed
>
> I tore down my race engine yesterday and found I have one
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