|
|
Post by Rocketdog on Nov 1, 2010 18:23:03 GMT -5
Just out of curiosity, and I need to know for a project. Have any of ya'll weighted a 50mm BBK piston before. The standard 47mm dished type weights 63 grams w/rings. If your interested.
RD
|
|
|
|
Post by 90GTVert on Nov 1, 2010 21:24:46 GMT -5
Luckily my engine blew up a few days ago, so I just happen to have a 50mm piston lying around. lol I have cut the valve reliefs a little, so weight will be slightly off of a box stock piston. My NCY 50mm piston w/rings weighs 76.7g. I dug the 39mm piston out and it weighs 43.3g.
|
|
|
|
Post by Rebel on Nov 2, 2010 1:27:10 GMT -5
|
|
|
|
Post by Rocketdog on Nov 2, 2010 6:11:14 GMT -5
Thanks GT. That helps a good deal. Sorry to hear about your mishap with the scooter though.
I saw it Rebel, but forgot about it. More good info. Thanks.
RD
|
|
|
|
Post by Rebel on Nov 2, 2010 11:09:26 GMT -5
Ya, I went brain dead, you posted on that thread.
I'm wondering if there would be a gain of any power with that mod. Better oiling would reduce some friction. A even slightly lighter piston might be more responsive. But then it might not be enough to make any real difference.
|
|
|
|
Post by Rocketdog on Nov 2, 2010 12:48:51 GMT -5
Kinda depends, I think. Does the stock setup splash enough oil on the cylinder walls? If so, is it as effective on a larger bore? Some splash systems work pretty well, others are iffy. Are the oil rings getting more than they can handle?
I do think that lightening the piston on a BBK is a good idea. At least if you don't get lighter than the stock 49cc piston. It might be too light to balance well. The opposite is why I wanted to know what the 50mm big bore piston weighted. I have a 47mm piston I want to try out for compression reasons and didn't want to get heavier than the 50mm one. The more towards the 47mm stock BB one the better, I think.
RD
|
|
CAN YOU HELP ME OUT MAN,AS i LOST ME JOB DUE TO NOT BEING ABLE TO GET THERE?ANY INF