open face/venturi

[MrPink]

Don't listen to him LJ - You don't want to do things in the right order do you?

 

[L J]

ahem, bling over function

 

[Roland]

Originally posted by Rabies
My opinion is that all a venturi does is restrict the air flow. Oh, and ensure that the marketing people have a nice buzzword to plaster all over their product. Aerodynamics ensure that the air flows around the ball without the aid of funny-shaped holes in the front of your bolt.

Now delrin/aluminium - there's a difference. Delrin is lighter and self-lubricating, so there's no o-rings and no oiling. Result: less kick, faster cycling, lower maintenance and possible lower cocking pressure. Some delrin bolts suffer from a blowback problem though, due to the lack of o-rings and a slightly loose fit.

I saw a delrin bolt at Planet today with two o-rings!

 

[jeevusmaximus]

My belsales delrin has its 2 o-rings still on it.

 

[spyderflashlcd23]

i believe it is called a super charger bolt.....that eclipse r useing on the eblades.........hands down to belsales for making such a nice bolt

 

[Rabies]

OK, some delrin bolts come with o-rings. Although I think Belsales in particular say you can take the o-rings off if you don't find blowback a problem. It's all in the tolerances - if the bolt is a loose fit then you'll get a lot of blowback gas up the feed tube leading to poor feeding.

 

[le-pig]

yep,but only on closed bolts

 

[Rabies]

You want to see the fun that people who bought the first batch of Evil Impulse bolts had. And delrin bolts on pretty much any blowback are a bad idea for the same reason.