Carb Barrel Material - Delrin?

[Mike Rappold]

For carburator barrels, has anyone used a plastic material like Delrin (Acetal) with good success? I have used brass but looking for other ideas for something lighter in weight.

Aluminum barrel in an aluminum housing eventually sticks.

Thanks in advance.

Mike

 

[steve wood]

delrin swells,and locks up.been there

 

[camaroboy383]

maybe charles could shed some light......the zoom i had from him had a composite barrel of a sort...... shoot him a pm...... it could be a closely gaurded secret,,im not sure,,, but knowing charles i dont think it would be ......

 

[Rick Reisinger]

For carburator barrels, has anyone used a plastic material like Delrin (Acetal) with good success? I have used brass but looking for other ideas for something lighter in weight.

Aluminum barrel in an aluminum housing eventually sticks.

Thanks in advance.

Mike

we are testing the WK-33 on gas right now with a brass tube pressed over the stock plastic barrel that comes stock in the carb.

Rick Reisinger

 

[David Bryant]

yeah, hard anodized aluminum barrel inside aluminum carb housing. Also popular back in the day with aluminum exhaust throttles.

 

[Buckshot]

Mike,

My barrels are aluminum bar turned down with a brass sleeve sweated over it. Works great.

Like Steve said, Delrin will swell and stick.

 

[RaceMechaniX]

I've machined aluminum barrels and hard Teflon Ano'ed before and had great success. You have got to have a good ano shop that knows what they are doing or you will likely have parts that are too loose or too tight.

 

[dave roach]

Try peek plastic.I run a drum made from peek plastic with no problems.It should work for a carb barrel.

Dave Roach

 

[David Bryant]

Try peek plastic.I run a drum made from peek plastic with no problems.It should work for a carb barrel

I've got PEEK wedges implanted between two of my lumbar vertebrae, held in by screws B)

 

[Jeff Schindler]

For a small carb, maybe machine the barrel out of brass?

For larger carbs, solid brass would maybe add too much weight, so the hard coat aluminum or brass sleeve methods would be best.

The hard coat would be expensive, unless you know a guy.

I wouldnt use any type of plastic due to the swelling with temp & aborbsion.

 

[HendricX]

PEEK with Teflon and carbon added will do fine.