Thanks. To be clear, my comments below on finding psi were for the Tiger
SU and about people posting to this list in the archives.
My SU is mounted in the stock location.
I did find it odd though the number of layers of rubber that were wrapped
around the pump to fit in the round clamp holding the pump. What is
supposed to be there?
Jay
On Fri, Apr 13, 2012 at 12:43 PM, <genepadgett@comcast.net> wrote:
> Hi Jay,
>
> Following your thread here with great interest. Have two old SU's in the
> "do not throw away anything" storage area.
>
> Just passing along a comment I once heard about Carter fuel pumps. I do
> not have personal experience to validate the point. Supposedly it is very
> critical that they be mounted lower than the fuel tanks because they like
> to push fuel but do not like to pull it.
>
> BTW, is your pump in the stock location? Most non-SU pumps mount
> vertically so in the stock location the Carter will extend down closer to
> the muffler, making heat shielding particularly important for reliability
> and longevity purposes.
>
> Just my 2 cents.
>
> Gene
>
> ------------------------------
> *From: *"Jay Laifman" <jay.laifman@gmail.com>
> *To: *Carmods@aol.com
> *Cc: *tigers@autox.team.net
> *Sent: *Friday, April 13, 2012 11:50:38 AM
> *Subject: *Re: [Tigers] Fuel Pump Pressures
>
> I also looked through the Archives for this information when I was thinking
> of rebuilding the SU or perhaps using the Carter I have. The Carter is
> pretty cool. It flows the gas without pulses and is very reliable.
> However, I never found any clear indication of the PSI rating. I found one
> guy who said he thought it was 3 psi. I found someone else that said 3-5
> is good, and suggested a pressure regulator be used for the common 7 psi
> pumps out there. But, no one came out with any authority of the rating of
> the psi.
>
> That said, as someone pointed out, the psi is often affected by the float
> valve. That would be carb specific. So, for those with non-stock carbs,
> they need to look to the specs of their carbs.
>
> I do know that Weber specifically provides that the Webers for Porsches
> should be at 2.5-3.5 psi. But, those float valves are much different than
> I have been used to in other cars. They vary their rate of flow based upon
> the level of the float. They are not just on/off valves that close at the
> top. So, on those, it is critical to have the right psi/flow and to set
> the floats at the top and the bottom (I'm used to just the top).
>
> Jay
> _______________________________________________
>
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