[Fot] SU float needle/seat

[JS Performance Motoring, LLC]

Andrew,

I presume they are sticking closed, not open?

I've seen some where the brass seat has a sharp edge that grabs the viton,
locking it shut.

I take a small center drill and break the sharp edge by hand.   That seems
to help.

3 to 4 psi is plenty high enough.   I run closer to 2 psi on mine.

Jason


On Sat, May 25, 2024, 9:59 AM Andrew Devenish via Fot <fot at autox.team.net>
wrote:

> Hi All, am having a little trouble with the needle/seat in my SU HS4 using
> the AM viton tipped parts from Moss. Using pressure 3-4 PSI (running) they
> have a quickly (< 1 hour use, but a lot of assembly/disassembly) shown a
> visible line, and are now sticking. Is there a recommended source for these
> parts ?   I see 070 and 096 bore parts offered - which is considered best
> for HS4 on a race 1300 ?
> Should I be running higher fuel pressure ?
>
> Thank you,
>       Andrew Devenish
>
> Sent from my iPad
>
> > On May 23, 2024, at 5:34 PM, Barr, Scott via Fot <fot at autox.team.net>
> wrote:
> >
> > I loved the Carbotech pads when I was using them on my GT6 for track
> days.  I never had the odd wear problems that have been described.  I
> always used the Hawk Blues on my Spitfire racer and liked those as well,
> though they didn't have to deal with the same heat as was generated by my
> GT6 brakes at Blackhawk.  The Hawk Blues I use on my Spec Racer Ford also
> work really well and stand up to enough heat to turn the rotors blue.  If
> you're unhappy with the Carbotech pads, the Hawk Blues are a good option,
> in my opinion.
> >
> > Scott (B.)
> >
> >
> > -----Original Message-----
> > From: Fot <fot-bounces at autox.team.net> On Behalf Of Scott Janzen via Fot
> > Sent: Thursday, May 23, 2024 4:02 PM
> > To: finishing Touch <fintouch at ptd.net>
> > Cc: Mark Cook via Fot <fot at autox.team.net>
> > Subject: Re: [Fot] TR6 Porterfield R-4 Rear Brake Shoes - Carbotech
> relining
> >
> > I agree. I get the pre-heated ones too. Carbotech stops as well or
> better, and last longer than any other pads I’ve tried, and I’ve tried
> quite a few.
> > Sent from my iPhone
> >
> >> On May 23, 2024, at 4:10 PM, finishing Touch via Fot <
> fot at autox.team.net> wrote:
> >>
> >> I'm on my 3rd set of Carbotech front pads for my TR6 race car and
> never had any issues....I do spend the extra $ and have them pre-bedded.
> >>
> >> Mike Kurtz
> >> #51 TR6
> >>
> >>
> >>
> >> _______________________________________________
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