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View Full Version : Ross Powroll 415 vs. Je 416


400EX QUADER
03-31-2005, 08:56 AM
What would give me the most power and be reliable? The Powroll 415 kit with the Ross 10:8:1 piston or the Je piston with all the same stuff but the Je 10:8:1 416 piston?:D Also what would be the advantage of either one?:confused:
cory
400EX QUADER
03-31-2005, 05:37 PM
Bump!
Kilabanshee
03-31-2005, 05:43 PM
I believe the JE weights slighly less then the ross. This helps the piston to rev alittle quicker. The difference between the two pistons are probobly very minimal probobly .5-1 hp max.
400EX QUADER
03-31-2005, 05:56 PM
I heard the opposite.:confused: Thanx anyway. Cals do you know?
400EX QUADER
04-01-2005, 09:08 AM
Bumpo!
400EX QUADER
04-01-2005, 01:12 PM
TTT:confused:
cals400ex
04-01-2005, 11:47 PM
the ross are the lightest. the je is the heaviest when comparing it with ross and wiseco. actually, i think the wiseco piston is actually heavier than the je but when you add the piston pin to the piston, the je weighs the most. now, i never weighed this myself. however, i run a ross with an aftermaket ross light piston pin so i know mine should be lighter. :D
400EX QUADER
04-02-2005, 01:52 PM
Ok thanx,does anybody know what pin comes in the powroll 415 kit?
400EX QUADER
04-02-2005, 09:40 PM
Anybody,thanx for all the responses.:D
cals400ex
04-02-2005, 11:39 PM
the standard pin should come with it. when you order a light pin from ross, the standard one comes with it too. so you have two. the light ones from ross are an addition $20. i also choose to have my piston thermal coated and i won't put another one in my bike without this done.
400EX QUADER
04-03-2005, 01:39 AM
Where and how do you get those thermal coated? Also why and price?:D Thanx cals you're a great help.
cals400ex
04-03-2005, 02:18 PM
the price depends on who does the work. i think i paid $40 or so from C&D for an 88mm piston. here are a few links you can check out:

http://www.swaintech.com/header.html

this is where i had my header and silencer coated.


http://www.swaintech.com/twostroke.html

this talks about coating a 2 stroke piston. it is more of a benefit to coat the 2 stroke but similar advantages apply to the 4 stroke.


http://www.automotiverebuilder.com/ar/ar29836.htm

here is another article about coating in general.
400exredrider
04-03-2005, 06:55 PM
JE and Ross are basically the same thing as far as construction,, the Ross is slightly lighter,, but ther JE and Ross stay true to Compression,, make sure you get a XR400 gasket set! helps quite a bit
cals400ex
04-04-2005, 10:24 AM
yeah, i run a thin cosmetic head gasket (i think this is slightly thinner than the xr400 head gasket) and no base gasket (hondabond). this helps provide a better quench and flame travel across the top of the piston.
Kilabanshee
04-04-2005, 01:31 PM
Yeah I had the 416 je 10.8:1 piston. I had friends which removed the base gaskets and such and were around 11.1 compression but they ran race fuel. I just got the JE 13.1 compression piston for my 450r with the thermal coating. I was told this helps reduce head and that way your safe to run 93 octane with the piston. This is all I was told. I run a 40/60 mix of vp-c12 to 93 after I got my porting, valves and other mods done which usually benifit if you run a higher octane.