[yragat]

I see that in holleys float adjustment guidelines they have 2 different dry settings depending on what material the floats are made of.They have one adjustment for brass and nitrophyl floats and another for duracon(plastic) floats.Anyone know what the difference is between nitrophyl and duracon and how to tell which one you have? My carb is a 390 cfm 4160 4barrel.

 

[dgcantrellsr]

I see that in holleys float adjustment guidelines they have 2 different dry settings depending on what material the floats are made of.They have one adjustment for brass and nitrophyl floats and another for duracon(plastic) floats.Anyone know what the difference is between nitrophyl and duracon and how to tell which one you have? My carb is a 390 cfm 4160 4barrel.

Why should it matter what type you got? Just adjust the level till it just seeps out of the plug hole on the side of the bowls.

 

[yragat]

I'm doing the dry setting with the bowels off.My engine is a L20B nissan and the carb is right over the exaust header,I din't want to blow myself up.I guess thats why holley has 2 different ways to adjust them.

 

[dgcantrellsr]

I'm doing the dry setting with the bowels off.My engine is a L20B nissan and the carb is right over the exaust header,I din't want to blow myself up.I guess thats why holley has 2 different ways to adjust them.

I just put a 3/8 drill bit between the float and top of bowl, then fine tune it when its on the vehicle.

 

[orangef4]

brass = brass
nitrophyl = solid black plastic
duracon = hollow white plastic

Hope that helps.

 

[matt167]

I'd run a nitrophotyl float, they last a bit longer

 

[yragat]

Thank you very much!!!
mine is a nitrophyl,so now I will know how to adjust it dry.