"soft" needle and seat for FI units

[Jerry G.]

Re: "soft" needle and seat for FI units

a holley needle is viton tipped. i have machined them for different carbs that used a metal needle to get better sealing. i used the original needle seat and just changed the needle. some had to be machined down in diameter and some needed sleeved to make larger diameter. holley also makes a spring loaded needle for rough conditions where the float vibrates

Clem As you know road racing throws a car around pretty severly. do you know of a spring loaded float that would work in a rochester FI? Jerry

[John D.]

Re: "soft" needle and seat for FI units

Clem As you know road racing throws a car around pretty severly. do you know of a spring loaded float that would work in a rochester FI? Jerry

On behave of my pal Clem let me tell you old JD never heard of such a float.
The beauty of the FI unit Jerry is they are great for auto-crossing and road racing. The float should not be an issue.
Now the float can be an issue if it's wore out. Meaning if the holes are elongated where the float pin goes thru then you will have problems.
Now to wait for Clems response.

[Clem Z.]

Re: "soft" needle and seat for FI units

On behave of my pal Clem let me tell you old JD never heard of such a float.
The beauty of the FI unit Jerry is they are great for auto-crossing and road racing. The float should not be an issue.
Now the float can be an issue if it's wore out. Meaning if the holes are elongated where the float pin goes thru then you will have problems.
Now to wait for Clems response.

i was referring to a "spring loaded needle/seat combo" not a float. they were made for 4 cylinder engines because of the vibrations but worked good for racing. i will post a picture if i can find one.

[Clem Z.]

Re: "soft" needle and seat for FI units

here it is,a spring loaded needle/seat. the spring and rod go inside the needle with the tip of the rod sticking out for the float to rest on