<VV> A couple of 94mm questions

Marc Marcoulides hharpo at earthlink.net
Sat Feb 24 15:13:36 EST 2018

on question 3, why not find another case?

>Hi All,
>I purchased a "kit" to make a 94mm big bore engine when I was at the 
>CORSA Portland National Convention.   I think that was about 2005.   The 
>machinist was named John and I think the last name was Warner.   I heard 
>that he did good work.
>I am now about ready to start assembling that engine for possible use in 
>either the Devin C or a Rampside.   However, I have heard of horror 
>stories about the 94 mm big bore engines and wanted some advice.   I 
>have heard of some of the 94 mm jugs cracking or splitting at the block 
>end where they are pretty thin.   I checked the bore and it appeared 
>well within specs for both taper and runout.
>I was thinking of taking a junked head and having it bored out so I 
>could do a trial torqued measurement for possible changes in taper and 
>runout before the pistons and crank are installed.
>My first question:
>Is that needed or even recommended or worthwhile?
>My second question:
>Am I in dangerous territory with the 94mm big bore jugs?   They seem 
>pretty stout and this will be for a normally aspirated engine, so no 
>turbo pressures involved.   The engine is NOT for racing, except perhaps 
>for the Devin C use in AutoX.   Rpms will likely remain south of 
>6,000.   I am interested in an engine that will have plenty of power for 
>fun but will not require frequent rebuilding.
>Third question:
>Since the upper row of head studs have been removed, what should I do 
>about replacing them?   I normally would use TimeSerts, but these studs 
>are getting pretty close to the larger bored diameter.   I am concerned 
>about taking even more material very close to the edge.   Should I 
>simply replace the studs and call it good?
>Thanks for any suggestions,
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