Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

Want to order aftermarket pistons,but not sure about sizes

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Old Dec 15, 2007 | 03:59 PM
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Default Want to order aftermarket pistons,but not sure about sizes

Want to order aftermarket pistons,but not sure about sizes.
it is for a B16A JDM SiRII engine and block. but i found out there are standard and oversizes pistons. from 81mm, 81.5mm(0.2"), 81.75mm (0.3") and 82mm (0.4")
which one do i get? thanks
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Old Dec 15, 2007 | 04:02 PM
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Default Re: Want to order aftermarket pistons,but not sure about sizes (Powered by VTEC)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Powered by VTEC &raquo;</TD></TR><TR><TD CLASS="quote">Want to order aftermarket pistons,but not sure about sizes.
it is for a B16A JDM SiRII engine and block. but i found out there are standard and oversizes pistons. from 81mm, 81.5mm(0.2"), 81.75mm (0.3") and 82mm (0.4")
which one do i get? thanks</TD></TR></TABLE>

i believe the standard piston size is 81mm. anything else is oversized and would consist of boring out the block.
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Old Dec 15, 2007 | 05:41 PM
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Default Re: Want to order aftermarket pistons,but not sure about sizes (philosofy1)

Yes, B16A/B, and B18A/B/C standard piston size is 81mm.
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Old Dec 15, 2007 | 06:58 PM
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Default Re: Want to order aftermarket pistons,but not sure about sizes (black_EM1)

thanks to you all
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Old Dec 15, 2007 | 07:01 PM
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Default Re: Want to order aftermarket pistons,but not sure about sizes (philosofy1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by philosofy1 &raquo;</TD></TR><TR><TD CLASS="quote">

i believe the standard piston size is 81mm. anything else is oversized and would consist of boring out the block.</TD></TR></TABLE>

x2 if you do this...be planning on paying a machine shop to bore it which means you have to take everything off and out of it and put it all back together. that means alot of money and time will come of it. just use standard size forged pistons.
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Old Dec 17, 2007 | 12:57 AM
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And don't intend to use the CTR piston.It won't fit because they have a higher deck height on a b16a block.x2 better,get forged piston from wiseco,Jepiston.Good luck.
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Old Dec 17, 2007 | 07:25 AM
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Default Re: (baulum)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by baulum &raquo;</TD></TR><TR><TD CLASS="quote">And don't intend to use the CTR piston.It won't fit because they have a higher deck height on a b16a block.x2 better,get forged piston from wiseco,Jepiston.Good luck.</TD></TR></TABLE>

Slow down there. Good on you for trying to help out, but you're a little off.

When the term "deck height" is used it refers to the height of the block itself, not the height of the piston.

The piston can be flat, domed, or dished. Flat, is well, flat. Domed is anything above flat, CTR pistons have a high dome. Dished is below flat, like a dish, and usually used for lowering C/R for turbocharging purposes.

I'm generalizing a little, but that's the jist of it.

CTR pistons will fit. They are 81mm, just like the B16A. If you are interested in them, please read before you act.
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Old Dec 17, 2007 | 07:37 AM
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Default Re: Want to order aftermarket pistons,but not sure about sizes (Powered by VTEC)

Don't people usually have the block honed when putting new pistons in and end up needing to get 81.25mm?
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Old Dec 17, 2007 | 07:41 AM
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Default Re: Want to order aftermarket pistons,but not sure about sizes (SkoundrelUSA)

Most of the motors that I've touched have just been bored over to 81.5mm when people get new pistons. But I think he's looking for standard size.
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Old Dec 17, 2007 | 09:36 PM
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Default Re: (black_EM1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by black_EM1 &raquo;</TD></TR><TR><TD CLASS="quote">

Slow down there. Good on you for trying to help out, but you're a little off.

When the term "deck height" is used it refers to the height of the block itself, not the height of the piston.

The piston can be flat, domed, or dished. Flat, is well, flat. Domed is anything above flat, CTR pistons have a high dome. Dished is below flat, like a dish, and usually used for lowering C/R for turbocharging purposes.

I'm generalizing a little, but that's the jist of it.

CTR pistons will fit. They are 81mm, just like the B16A. If you are interested in them, please read before you act. </TD></TR></TABLE>
CTR piston do not fit a b16a2 block perfectly,simply because the height of the piston is higher than the b16a2 piston.When you try to use the CTR piston in a b16a2 block,it sticks out about 0.16.And of you try to start up the engine,then you say good bye to valves.Me also,i wanted to use the ctr in my b16a2,but basically it don't fit that easy.A b16a2 block is different from a b16b block.Despite that the bore and stroke are all the same.Forged piston will work better.
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Old Dec 18, 2007 | 08:51 AM
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Default Re: (baulum)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by baulum &raquo;</TD></TR><TR><TD CLASS="quote">
CTR piston do not fit a b16a2 block perfectly,simply because the height of the piston is higher than the b16a2 piston.When you try to use the CTR piston in a b16a2 block,it sticks out about 0.16.And of you try to start up the engine,then you say good bye to valves.Me also,i wanted to use the ctr in my b16a2,but basically it don't fit that easy.A b16a2 block is different from a b16b block.Despite that the bore and stroke are all the same.Forged piston will work better.</TD></TR></TABLE>

Um, I think I'm the one who pointed this out to you. The CTR pistons are 81mm, just like the PR3(B16A2) piston. However, yes they are roughly a certain distance "out of the hole" because of the high dome.

There are quite a few people here with CTR pistons in a B16A. To determine piston-to-valve clearance, you clay the motor. Please PM me if you want to know what that is.

And for the last time. A B16A/2/3 is not a B16B. A B16B is a destroked B18C5. A B18C5 block, with different internals.
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