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View Full Version : OEM cyclinder vs. NMotion


chad502ex
12-22-2004, 07:29 PM
a picture is worth a thousand words
chad502ex
12-22-2004, 07:31 PM
stock thickness- no bore
chad502ex
12-22-2004, 07:33 PM
NMotion 99mm bore w/ added support
chad502ex
12-22-2004, 07:35 PM
...
BOONE450R
12-22-2004, 07:46 PM
Chad can you show a pic of the top side? So we can get a look at the water jackets.
86atc250r
12-22-2004, 07:54 PM
Nice --- I suppose you are measuring the thick part since it's likely the weakest portion of the casting, eh?

Good looking jug though...
chad502ex
12-22-2004, 08:03 PM
top side
chad502ex
12-22-2004, 08:04 PM
Originally posted by 86atc250r
Nice --- I suppose you are measuring the thick part since it's likely the weakest portion of the casting, eh?

Good looking jug though...

i was
chad502ex
12-22-2004, 08:21 PM
oh shiznit! I spelled cylinder wrong in the thread title. hope no-one notices:eek2:

:ermm:

dang no-one is wrong too

;)
twisted threads
12-22-2004, 09:54 PM
Looks like a nice peice of work! The NMotion cylinder is a 520 right??
chad502ex
12-23-2004, 04:41 AM
Originally posted by twisted threads
Looks like a nice peice of work! The NMotion cylinder is a 520 right??

Thanks - i'm really pleased with the product thus far

yes, NMotion sells a 520r 101mm piston and cylinder kit. The cylinder pictured is a cylinder I got them to custom make to 99mm

This is a two of a kind cylinder. In other words, they indicated that they would not be selling anymore 99mm cylinders because of the added tooling jigs needed to machine the jug. They'll sell 101mm all day long though.

chad502ex
beerock
12-23-2004, 06:48 AM
isnt that a all aluminum nikasil bore on the nmotion cylinder?

or is the sleeve grinded smooth to the cylinder?
chad502ex
12-23-2004, 07:06 AM
Originally posted by beerock
isnt that a all aluminum nikasil bore on the nmotion cylinder?

or is the sleeve grinded smooth to the cylinder?

;)

no smooth grind marks
BOONE450R
12-23-2004, 12:57 PM
so in order to make it thinker they made the water jackets smaller:ermm:
Thanks
chad502ex
12-23-2004, 01:13 PM
no. most of the illusion is overhang casting on the jacket lips. i'll have to clean up the "mouths" a bit. The difference is so small id any at all.

when i clean it up better my install i'll shoot pictures measuring the jacket on stock and new with a micrometer


after cleaning the "Mouths" up a bit- I stand corrected, yes they are less than 1 mm smaller measured on the digital micrometer. in order to make the casting bigger the water jackets had to be smaller width. This still doesn't concern me a bit since coolant flows around and through the cylinder and probally would'nt affect temperature much. If someone is concerned about the jackets being a little smaller they can always cool the coolant more on the radiator side (see PWR Radiator thread).
Blown 331
12-24-2004, 12:46 PM
How much does a 101mm cylinder with piston cost?
twisted threads
12-24-2004, 01:07 PM
Originally posted by Blown 331
How much does a 101mm cylinder with piston cost?

I would like to know this also.:cool:
chad502ex
12-24-2004, 01:15 PM
Originally posted by twisted threads
I would like to know this also.:cool:

i wish i really could help you with the answer to that question. I'm sure someone here has to already bought one. I think oldsandman bought this kit. maybe he can enlighten us all. I think the 520 kit sells for $995- that includes piston rings cylinder and gaskets.