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86.4mm or 86.5mm ?

 
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PostPosted: Tue Jul 24, 2001 3:37 am    Post subject: Reply with quote

From: Ben
Email: ballison@vt.edu
Date: 24 Jul 2001
Time: 02:37:38

Almost ready to fire up my engine after a rebuild and a thought just struck me.

I re-used my pistons and didn't rebore my cylinders (they were perfect), but I did put on new rings. My old cylinders all measured at 86.4mm (stock specification, I believe), but the rings (Deves) are 86.5mm. Is this just a rounding difference, or am I going to have to tear this thing back apart and bore out the cylinders by 0.1mm?

thanks,
Ben

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PostPosted: Tue Jul 24, 2001 12:36 pm    Post subject: Reply with quote

From: Vaughan
Email: vscott77@nospam.hotmail.com
Date: 24 Jul 2001
Time: 11:36:36

Where in the bore did you measure? At the top? Are you aware they are tapered? Do you have the specs for the taper?

I bet you're fine... just run the cheapest 30wt oil for the first change to break the rings in quickly, then switch to a good synth like Mobil 1, and you'll be fine... on my second (race) season on just such a re-ring, and no engine problems yet in spite of elevated temps, ran out of oil once, etc... just need more power! LOL

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