bored cylinders to the max

[Surfrjag]

I am wondering if there would be any problems with running stock cylinders at 66.5. i know the sleeve gets pretty thin.

[lms1977]

I have without problems but im sure your pushing your luck

 

[Surfrjag]

warping the sleeve or overheating arent a problem?

[Finch]

I ran a set at 66 the crank went before the cyls

 

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[Nightmare]

I thought I remember hearing overheating becomes an issue

It does, I couldn't keep mine cool if the temp went over 90 degrees outside.

 

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[WINDYCITYJOHN400]

I'm running 66.75 in mine for the last 3 years making 65 hp and I'm fine.

But I won't get more than a light hone on them at this point. So I'm asking myself the classic "What next" question.

[SlowerThanYou]

Why not get them plated?

[trickedcarbine]

Yes, nicasil if they are ported nicely.

[SlowerThanYou]

Yep

[Paulie B]

I ran my ported stockers at 66 for 2 years.They were still at 155 psi when I retired them and the pistons looked fine. I also had an oversize rad and aftermarket impeller though.