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oem oversize jdm b18c pistons and rings

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Old Dec 2, 2009 | 12:48 AM
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Default oem oversize jdm b18c pistons and rings

is there any way to get a set of these? which pistons do you guys usually use for rebuilding your r's engines? i want my teg's engine to be close to stock
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Old Dec 2, 2009 | 01:07 AM
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Default Re: oem oversize jdm b18c pistons and rings

Have you tried ICB? I got mine from there back in the day.
http://yhst-1408381693991.stores.yah...rpikitb11.html
http://yhst-1408381693991.stores.yah...ctyrrise1.html
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Old Dec 2, 2009 | 01:33 AM
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Default Re: oem oversize jdm b18c pistons and rings

really overpriced ones...but I don't think you want to pay $1500 for a set of pistons
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Old Dec 2, 2009 | 01:46 AM
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Default Re: oem oversize jdm b18c pistons and rings

the prices quoted on the website are for 1 piston, right?
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Old Dec 2, 2009 | 02:59 AM
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Default Re: oem oversize jdm b18c pistons and rings

No they're not that expensive

http://www.inlinefour.com/usspecintypp.html
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Old Dec 2, 2009 | 05:17 AM
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Default Re: oem oversize jdm b18c pistons and rings

Originally Posted by itrSteez
No they're not that expensive

http://www.inlinefour.com/usspecintypp.html

Those are USDM ITR pistons  But you're right; they aren't as expensive as they were once upon a time. Or I may have been thinking forged overbore pistons.

Anyways, you can pick up Spoon .25mm over pistons for about $500 for a set of four.

http://www.spoon.jp/jpn/database/details.php?id=631
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Old Dec 2, 2009 | 06:24 AM
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Default Re: oem oversize jdm b18c pistons and rings

Just get them from ICB, good prices and good service.
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Old Dec 2, 2009 | 09:13 AM
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Default Re: oem oversize jdm b18c pistons and rings

seems like getting a set of pistons and rings from spoon is the cheapest option. how do you order fro the japanese spoon website?
a set of pistons and rings from ICB would cost about 700 bucks (

Last edited by xQB21x; Dec 2, 2009 at 09:51 AM.
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Old Dec 2, 2009 | 09:15 AM
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Default Re: oem oversize jdm b18c pistons and rings

Originally Posted by itrSteez
No they're not that expensive

http://www.inlinefour.com/usspecintypp.html
Thats where I picked mine up from.
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Old Dec 2, 2009 | 09:52 AM
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Default Re: oem oversize jdm b18c pistons and rings

Originally Posted by jordanitr
Thats where I picked mine up from.
but they are usdm b18c pistons and i need jdm ones
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Old Dec 2, 2009 | 11:32 AM
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Default Re: oem oversize jdm b18c pistons and rings

What's the better piston to go with performance wise? JDM or USDM, and why?
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Old Dec 2, 2009 | 02:17 PM
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Default Re: oem oversize jdm b18c pistons and rings

USDM pistons will lower your compression. I'd go with the spoons....I think they have a US website....or you can order through me (with conditions of course)
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Old Dec 2, 2009 | 02:29 PM
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Default Re: oem oversize jdm b18c pistons and rings

here is a site that sells them in the states...They charge about what I would have charged, so timewise it might be quicker to order through them.

am I not merciful?....AM I NOT MERCIFUL!!!!

http://www.outperformanceshop.com/pr...30-18c-010.htm
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Old Dec 2, 2009 | 02:31 PM
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Default Re: oem oversize jdm b18c pistons and rings

and yet another shop in the states....same price

http://www.einoxtuning.com/index.php...dir/asc/cat/4/
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Old Dec 2, 2009 | 05:13 PM
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Default Re: oem oversize jdm b18c pistons and rings

I may just go with the JDM ITR piston kit then, on my USDM B18C5. But the Spoon kit is something to think about. How much will it actually increase performance?
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Old Dec 2, 2009 | 07:01 PM
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Default Re: oem oversize jdm b18c pistons and rings

Well, if its not changing compression, and its not forged pistons, it probably won't change the performance at all. Spoon has been known to take OEM parts and making them only slightly better, then rebadging them as their own. It looks like that's the case here, because I see no real major difference between them and OEMs. Perhaps the rings are stronger and more resistant to breaking.

If you're looking for an performance increase, might want to source some B16B pistons to raise the compression, but you'll need consider retuning.
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Old Dec 2, 2009 | 07:07 PM
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Default Re: oem oversize jdm b18c pistons and rings

going by the description, it seems that they've balanced OEM pistons so that the weight of each piston are within 1 gram of each other. And the rings are within 0.07mm of the grooves. That's pretty good tolerance.
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Old Dec 2, 2009 | 08:39 PM
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Default Re: oem oversize jdm b18c pistons and rings

Originally Posted by xQB21x
but they are usdm b18c pistons and i need jdm ones
I bought the JDM oversized and rings from them.
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Old Dec 15, 2009 | 10:31 AM
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Default Re: oem oversize jdm b18c pistons and rings

In line 4 don't carry JDM itr spec 98 oversized pistons, they only offer USDM itr oversized ones and they also produce their own replicas of USDM itr pistons.

Seems like ICB do not have oversized JDM itr pistons in stock. I wrote them an email about a week ago asking if they are going to have such pistons in stock sooner or later but have not receved any reply.

Not I think about using CTR pistons. I'll get about 11.8 comp ratio with them. What do you think about such setup? I also have GSR engine lying in my garage for a couple of years, maybe i should build something out of it. Any suggestions?
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Old Dec 15, 2009 | 01:16 PM
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Default Re: oem oversize jdm b18c pistons and rings

They did in October when I bought them from inlinefour, they are stamped p73-00 on top. US ones are stamped P73-A0.
I payed $240 for them and $140 for oversized rings also. I had my block bored out .25 and put these pistons in, 2 months ago.
Maybe they just quit selling them.


Just called them and asked, they said they are out of stock but should be recieving more in 3 months.

Last edited by jordanitr; Dec 15, 2009 at 02:18 PM.
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Old Dec 16, 2009 | 09:07 PM
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Default Re: oem oversize jdm b18c pistons and rings

oh thanks man.
i am curious what cr i will get using pct (b16b) pistons with b18c5 block and head. different calculators show different figures. any ideas?
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Old Dec 17, 2009 | 01:40 PM
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Default Re: oem oversize jdm b18c pistons and rings

Originally Posted by MiraiZ
going by the description, it seems that they've balanced OEM pistons so that the weight of each piston are within 1 gram of each other. And the rings are within 0.07mm of the grooves. That's pretty good tolerance.
also very easy to do yourself with a $15 harbor freight gram scale and a die grinder
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Old Dec 18, 2009 | 02:49 AM
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Default Re: oem oversize jdm b18c pistons and rings

Originally Posted by idrivesideways
also very easy to do yourself with a $15 harbor freight gram scale and a die grinder
yeah but the problem is that no seller have them in stock so that you could apply those instuments to it )))
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