Sorry about the typo, I meant it to be about HS4 carbs but brainfarted the last
reference to a HS6.
Looking for a solution like the â??leaner B1Afâ?? that Apple Hydraulics sent me
(and Iâ??ve never really known what the numbers are at each station on the
needle) for the ZS carbs that I still run to this day on my TR6.
Thanks for the confirmation on the needles. They â??areâ?? bent, and since I
have new jets for them then new needles are in order. My experience with some
biased needles on ZS carbs made me overthink it.
Which flavor now for needles at altitude (5340 ft.) for racing?
Thanks
Bud
> On Nov 14, 2018, at 4:05 PM, Barr, Scott <sbarr@McCarty-Law.com> wrote:
>
> Wow, HS6 sounds like a lot of carb for a Spit, but maybe that's just me.
> That's plenty for the 2-liter engines.
>
> Yes, I would think that the needles should be straight. I know some carbs
> have a needle biasing function, but I'd still assume they should be straight.
>
>
> Here's a site with an SU tuning book that includes a needle chart. It does
> indeed show a "3" needle. Does that match what you have?
>
> Scott (B.)
>
> -----Original Message-----
> From: Fot <fot-bounces@autox.team.net> On Behalf Of Bud Rolofson via Fot
> Sent: Wednesday, November 14, 2018 2:25 PM
> To: FOT <fot@autox.team.net>
> Subject: [Fot] SU needles bent ???
>
> Iâ??m working on some HS4 SU carbs and upon looking at the needles I rolled
> them on a flat surface much like youâ??d do a pool cue to see if itâ??s
> straight. They do not roll flat and look like they are bent. Shouldnâ??t
> they be perfectly straight?
>
> Also the only stamping I could make out is a #3. I was expecting to see and
> AN or a DD stamp but these werenâ??t original to my Spitfire (came off a old
> mini cooper) so they could be both wrong and bent. Anyone know an appropriate
> leaner needle (for Denver) for Spitfire HS6 Su carbs?
>
> Thanks
> Bud
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