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Do I need to overbore when switching pistons?

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Old Oct 16, 2003 | 10:36 PM
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Default Do I need to overbore when switching pistons?

I want to increase the compression on the b17. Money is an issue, so I was thinking of throwing some stock bore b16 pistons in there w/ new rings. There is nothing wrong with the cylinders, so can I just hone it and put the stock bore pistons in w/o going overbore?
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Old Oct 17, 2003 | 08:39 AM
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Default Re: Do I need to overbore when switching pistons? (SilverCIVIC96)

You should be able to but first get a Haynes manual and read the specs for the cylinders. If it follows the specs then you are good to go. I just rebuilt 2 honda engines. One had 65k on it and the other had 120k on it. Niether had to be bored, just honed.
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Old Oct 17, 2003 | 08:56 AM
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Default Re: Do I need to overbore when switching pistons? (SilverCIVIC96)

How many miles are on the block? I ask this because hondas with over 100K on them the cylinders start to take on an egg shape that you might not be able to take out with a standard hone. The rings might be able to seal it at first but after you start abusing it a little you may get some blow by, because the new pistons were are more perfectly round than the egged cylinder.
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Old Oct 17, 2003 | 10:48 AM
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Default Re: Do I need to overbore when switching pistons? (SilverCIVIC96)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SilverCIVIC96 &raquo;</TD></TR><TR><TD CLASS="quote">I want to increase the compression on the b17. Money is an issue, so I was thinking of throwing some stock bore b16 pistons in there w/ new rings. </TD></TR></TABLE> good idea! are you sure you want just B16 pistons? you should throw in CTR pistons for 11.5:1 or so compression... that is great compression ya know.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SilverCIVIC96 &raquo;</TD></TR><TR><TD CLASS="quote">There is nothing wrong with the cylinders, so can I just hone it and put the stock bore pistons in w/o going overbore?</TD></TR></TABLE> just honing is the right idea in your case. go for it
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Old Oct 17, 2003 | 11:21 AM
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From: Norcal
Default Re: Do I need to overbore when switching pistons? (owen_the_soyboy)

Engine has about 65k miles, what do you guys think?
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Old Oct 17, 2003 | 11:38 AM
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Default Re: Do I need to overbore when switching pistons? (SilverCIVIC96)

A simple honing should do it, in your case
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Old Oct 17, 2003 | 01:28 PM
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Default Re: Do I need to overbore when switching pistons? (Archidictus)

I agree!

But look for the crosshatched look in the cylinders. If you hone it too much you could take off too much material and then have to get it bored .25 over.

Good Luck!!!!
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Old Oct 17, 2003 | 03:22 PM
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From: Norcal
Default Re: Do I need to overbore when switching pistons? (dohcter g)

would you guys recommend honing it myself (never done it before)... or taking it to a shop?
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Old Oct 17, 2003 | 03:30 PM
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Default Re: Do I need to overbore when switching pistons? (SilverCIVIC96)

honing is pretty simple just try to watch the pattern ...keep the cylinders lubed...and try not to go to fast...practice makes perfect..take your time...and if your not sure have a machine shop do it......are u puting in new b16 pistons or used?
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Old Oct 17, 2003 | 03:46 PM
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Default Re: Do I need to overbore when switching pistons? (SilverCIVIC96)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SilverCIVIC96 &raquo;</TD></TR><TR><TD CLASS="quote">would you guys recommend honing it myself (never done it before)... or taking it to a shop?</TD></TR></TABLE>
If you do plan on honing the cylinders yourself, I want to know your outcome and your process. I am also looking to do the same but with my d block.
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Old Oct 17, 2003 | 04:57 PM
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Default Re: Do I need to overbore when switching pistons? (AlphaQup)

Im thinking of used b16 pistons w/ new rings, is that a good idea?

Ill let u know how it goes(w/ pix) if I do it myself.

do you guys know how much new rings are from honda?
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Old Oct 17, 2003 | 05:14 PM
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From: Forest City, NC, USA
Default Re: Do I need to overbore when switching pistons? (SilverCIVIC96)

New OEM rings anywhere are around $119.00.
Your part # for the rings you need if you want standard bores is:

13011-PR3-003

This is the part # of of the box for my piston rings!
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