[img]i/expressions/face-icon-small-happy.gif[/img] Both the DS's Have the intakes off right now. I sent them to MisterHP for some more porting. Should be back next week some time.

 

Anybody try the Regina O-ring 520 (PN 520ORS)? Average tensile streghth of 7510 lbs. Chain weight is .4oz per link. They say its pre-stretched for minumal adjustment. They also make a 530 O Ring; Average tensile streghth 7868 lbs with chain weight is .66oz per link.

 

Marky,

I thought the 520 had a tensile strength 7868?

Regina chains

 

Depends on which 520 chain. The Z ring 520 chain you listed is quite a bit heavier than the O ring 520 chain I posted. In fact the Z ring chain you listed weighs .64oz per link, nearly the same as the 530 O ring chain! The one I listed is quite a bit lighter, but still rated excellent on strength. The only benifit of the Z would be from the weight savings from the 520 sprocket.