over bore on b18c1

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Jul 27, 2005 | 06:24 PM

OH_SNAP10k_SHIFT!

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From: R.O.C., NY, US of A

over bore on b18c1

what up all! i'm thinking of boring out my block with .25 o.s. jdm itr pistons. i just want to know what my displacement will be? and also, my friends tell me i can go to NAPA to get my machine work done. is that a good idea? and how much does something like this cost? would i need to do the same thing to my combustion chamber also?

Jul 27, 2005 | 06:45 PM

xtrafastcivic

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Joined: Mar 2001

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From: Bay Area, CA

Re: over bore on b18c1 (OH_SNAP10k_SHIFT!)

when boring over to .25 is to just to clean up the sctraches on the walls and what not.. it will not affect displacement enough to make a difference ..
this is IMO...
so no to the combustion chamber question and about NAPA you would have to see if anyone has used them before....

Jul 27, 2005 | 06:49 PM

civicgsr19

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From: Oklahoma City,, Oklahoma, Da 73170

Re: over bore on b18c1 (OH_SNAP10k_SHIFT!)

Youll go from 1797cc's to 1808cc's, and a compression ratio of 10.0:1 to 10.6:1
Got this from c-speedracing.com

When it comes to honda's, especially na ones, every little bit helps, i'd say do it.

Jul 27, 2005 | 07:08 PM

OH_SNAP10k_SHIFT!

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From: R.O.C., NY, US of A

Re: over bore on b18c1 (civicgsr19)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicgsr19 »</TD></TR><TR><TD CLASS="quote">Youll go from 1797cc's to 1808cc's, and a compression ratio of 10.0:1 to 10.6:1
Got this from c-speedracing.com

</TD></TR></TABLE>
i'm just wonderin why my comp would go up. thanks!

Jul 27, 2005 | 07:31 PM

civicgsr19

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From: Oklahoma City,, Oklahoma, Da 73170

Re: over bore on b18c1 (OH_SNAP10k_SHIFT!)

You are going with a bigger dome on the piston than your stock usdm p72 ones.

Less room in the combustion chamber at TDC = more compression.

Jul 27, 2005 | 07:34 PM

OH_SNAP10k_SHIFT!

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Joined: Jul 2005

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From: R.O.C., NY, US of A

Re: over bore on b18c1 (civicgsr19)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicgsr19 »</TD></TR><TR><TD CLASS="quote">You are going with a bigger dome on the piston than your stock usdm p72 ones.

Less room in the combustion chamber at TDC = more compression.</TD></TR></TABLE>yeah tru. that makes sense. thanks

Jul 27, 2005 | 07:58 PM

ninor

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comp ratio is more like 11.3:1

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Jul 27, 2005 | 08:08 PM

civicgsr19

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Joined: May 2002

Posts: 913

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From: Oklahoma City,, Oklahoma, Da 73170

Re: (ninor)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ninor »</TD></TR><TR><TD CLASS="quote">comp ratio is more like 11.3:1</TD></TR></TABLE>

Neg.

Check it yourself...

http://www.c-speedracing.com/h...c.php

Jul 27, 2005 | 08:19 PM

Hybrid96EK

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Joined: Apr 2003

Posts: 6,919

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From: In the garage

Re: (civicgsr19)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicgsr19 »</TD></TR><TR><TD CLASS="quote">

Neg.

Check it yourself...

http://www.c-speedracing.com/h...c.php</TD></TR></TABLE>

Quit being a ****. GO back, correct the cylinder bore size, MAKE SURE to select stock head gasket thickness and a B18C1 cylinder head along with JDM ITR pistons and you will get:

11.415091306947745

Thank you, drive through.