does any one know if there any good????

 

I don't know the brand but i just wouldn't do ebay internals not the place to skimp on.

 

Npr(Nippon Piston Ring Co.) Have been around since the 30's.they are a japanese company and make very good quality parts from automotive to marine

Here is a list of some of their Main Customers
TOYOTA Motor Corporation, NISSAN Motor Co., Ltd., MITSUBISHI Motor Corporation, MAZDA Motor Corporation, HONDA Motor Co., Ltd., ISUZU Motor Ltd., FUJI Heavy Industries, Ltd., DAIHATSU Motor Co., Ltd., SUZUKI Motor Corporation, HINO Motor Ltd., NISSAN DIESEL Motor Co., Ltd., MITSUBISHI FUSO Truck & Bus Corporation, YAMAHA Motor Co., Ltd., KAWASAKI Heavy Industries, Ltd, Daimler AG, BMW AG., MITSUBISHI Electric Corporation, MITSUBISHI Heavy Industries, Ltd., KOMATSU Ltd., KUBOTA Corporation, ISEKI&Co., Ltd., MITSUI Engineering & Shipbuilding Co., Ltd., Hitachi Zosen Disel & Engineering Co., Ltd., Akasaka Diesels Ltd., KOBE DIESEL Co., LTD., HANSHIN DIESEL WORKS., LTD., HYUNDAI HEAVY INDUSTRIES Co., Ltd., MAN B&W DIESEL A/S

They are Long term suppliers of Piston rings to Mercedes Benz

 

I've bought some PR3 pistons from NPR, no complaints here.

 

i have pct (b16b/ctr) pistons from ebay by npr, 3rd set of pistons from npr i have had, and all 3 sets have worked perfect for my set ups.

1 set of pr3 in my old b16a
1 set of itr in my buddys ls
and now pcts in my b18c

 

has any1 used them with boost?

 

Eh it will be like boosting your factory pistons. They're not meant to be a strength upgrade and are normally used for N/A builds even though they sell some "low compression" castings.

 

x2, factory cast piston is basically what you're getting. if you do boost, get a good and i mean GOOD tune and don't get carried away with the HP. at 300whp and under the {stock} b18c seems to live for a few years. above 400whp, they become time bombs

 

There's a good thread over at Team Integra about a member who boosted with Nippon Pistons. One ended up failing and blew chunks of metal all through his water jacket. Block was toast as were the valves but the head was somehow OK.

 

im thinking about getting a set of these pistons too.

 

this happens to lots of stockish bottom ends when you get crazy with the pressure. something eventually gives. the rods also get nervous at 400whp. unless i was throwing money at a drag car there's no way i would take a stock b18c over 300whp, doing so just puts you on the clock

 

I already have my CTR's just waiting to get them machined to accept a floating wrist pin and then progress continues.

 

+1 Get reputable name brand or oem internals. my #1 rule.

 

Will they be full floating when youre done? in the piston hole and rod hole? I heard that causes problems.

 

Did you get the standard bore or oversized?

 

nippon pistons have been used in countless builds. is that not reputable?

 

I got 82mm, oversize by 1mm or .040.

Yes they will be full floating; if you were to buy a set of aftermarket forged rods and pistons they will be full floating. Factory rods are press fit but I'm using forged I-Beams with the CTR's because I got a deal on them.

Nippon and RS Machine are quality manufactures that sell on ebay and are very reputable. Now other than those two I'm not too sure.

 

you guys do realize the difference between full floating and press fit right? a press fit floats in one place or the other. generally you expand the pin in the rod and let it float in the piston. full floaters float in the piston and the rod. with aftermarket rods it's not a big deal. on a factory rod. you're honing out material that isn't exactly thick in order to insert a bronze bushing. full floaters also use clips to hold the pin in place. easier on a tear down but in theory less reliable than a press fit. if you have factory style cast slugs and factory rods, make the job easier and stay press fit. aftermarket pistons full float pistons can be setup either way, the choice should be with what rods you have.

 

Yes exactly. I'm having the CTR pistons machined to accept a c-clip because I'm running aftermarket rods.

 

so I've been looking for a thread with someone using a npr pistons with boost. I want to see what kind of power did others make with theses pistons reliably.

 

make power reliably is all over the forced induction forum. in fact i already gave away the numbers in my previous posts. seriously though. it depends on the tune, how hard you drive it on a daily basis and how well you control the heat. at 300whp you will live for awhile. at 400whp the whole engine is starting to get nervous. if i remember right , the top hp figure for a stock b18c was something like 618whp. it's anyones guess how long that engine will be alive

 

Did you not read the thread before posting? Those pistons aren't any stronger than a factory piston so just sarch for how much hp can you make on a STOCK motor.

 

my boy hue is running it. and it's ran fine with no problems.. isn't nippon from japan?