[Fot] Float needle valves

Fri Mar 19 04:24:40 MDT 2021

Marcel;Yes, that could be.  I wonder of the viton valve seat needs this, as there are some viton tipped needles out there with no spring in them.  
Just curious at this point. Seems like nothing to worry about for a race car...
Thanks again,Phil

-----Original Message-----
From: van.mulders.marcel--- via Fot <fot at autox.team.net>
To: fot <fot at autox.team.net>
Sent: Fri, Mar 19, 2021 4:50 am
Subject: Re: [Fot] Float needle valves

 Maybe  the spring is there to even out the pressure on the needle/valve seat surface when the fuel is agitating on the float . In doing so the plastic end on the needle doesn't wear out but higher fuel pressure can easily lift the needle off the seat. I believe this is useful for a road car but not for a race car.Marcel.

Van: "fot" <fot at autox.team.net>
Aan: "Bruce Stutzman" <stutztr4 at gmail.com>
Cc: "fot" <fot at autox.team.net>
Verzonden: Vrijdag 19 maart 2021 02:38:52
Onderwerp: Re: [Fot] Float needle valves

Yes. I don’t really understand why the little spring is used, which is why I asked. Joe told me the same thing but not why....Phil

Sent from my iPhone

On Mar 18, 2021, at 3:37 PM, Bruce Stutzman <stutztr4 at gmail.com> wrote:

Unfortunately I don't remember which, but Joe Curto specifies solid needles for certain SUs and spring loaded for others.Bruce Stutzman
On Wed, Mar 17, 2021 at 5:58 PM Phil Gott via Fot <fot at autox.team.net> wrote:

Thanks, everyone!Phil

Sent from my iPhone

On Mar 17, 2021, at 3:27 PM, Erik Jacobsen via Fot <fot at autox.team.net> wrote:

 Tony,Yeah, same scenario in my Bugeye with 3-screw tops (even if they're tiny compared to your TR-4 carbs), one front pivot, one back pivot. 
    On Wednesday, March 17, 2021, 02:17:43 PM CDT, Tony Drews via Fot <fot at autox.team.net> wrote:  

With the SU's with the 3 screw tops we ended up with one pivoting at the front and another at the back.  Any other orientation resulted in weirdness after hard braking, right when you want to stomp the gas.

Another vote against grose jets, they couldn't handle hardly any fuel pressure and the stock needle valves did great under up to 7 psi (more than we wanted, but fighting the doggone regulators).

- Tony Drews

 On 3/17/2021 1:22 PM, Phil Gott via Fot wrote:

 Yup. Had that problem. Floats must “face” fore and aft, meaning the pivot points across the car. WIth pivots at an angle to the car we first tried to overcome the apparent starvation in turns by increasing the fuel pressure, which just made things worse. Fuel pressure at 2 1/2 psi and fore/aft floats works well. Thanks., Phil 

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On Mar 17, 2021, at 12:41 PM, rek46 via Fot <fot at autox.team.net> wrote:

    NO GROSSS JETS...lousy and not for competition....Use GOOD/New old style floats....you need positive open and close.....heres a tip..check your float direction for best perf....meaning , are you having brake to accel. probs on heavy brake corners?  You prob have each float facing toward center...not best....Solved by making both floats face same direction(frt. or back)....rick    In a message dated 3/17/2021 12:04:02 PM Eastern Standard Time, fot at autox.team.net writes:    
  Thanks, Erik and Joe; Good to know. I’ve had Gross Jets hang open with some royal flooding. Won’t use those again! Phil

 Sent from my iPhone  

On Mar 17, 2021, at 11:19 AM, Erik Jacobsen <kekjacobsen at yahoo.com> wrote:

     Phil, I use the plain old solid needles in both street and race cars and haven't had any issues. They do wear out eventually, but after 7 years in the race car, I still haven't had a problem.   Jake      On Wednesday, March 17, 2021, 10:13:30 AM CDT, Joe Boruch via Fot <fot at autox.team.net> wrote:           Phil, years ago I stopped using Gross Jets, which have the spring loaded ball on the end of the float needle.  I suspected some flow issues and others had said that they had issues.  JoeB       On Wednesday, March 17, 2021, 08:16:11 AM EDT, Phil Gott via Fot <fot at autox.team.net> wrote:        Anyone have experience with needle valves that do not have the spring loaded contact where the needle valve rests on the float? Is a solid one better, worse, or require different set up? Phil Gott   Sent from my iPhone _______________________________________________ fot at autox.team.net   http://www.fot-racing.com   Donate: http://www.team.net/donate.html Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot   Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/jaboruch@yahoo.com                   _______________________________________________
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