I run just a little over 50psi, which is the most my regulator will allow.  The higher pressure will increase atomization.  It will increase fuel flow a bit, but that is easily handled with a bit of tuning, unless you've sized your injectors to large.  I have my MegaSquirt configured for staged injection, so that at low MP and RPM only one set is used.  That has been effective in delivering a smoother idle.



On Jan 19, 2013, at 10:57 AM, Bill Bradburry wrote:

> All of the fuel injector capacity figures that I have seen are at a pressure
> of 43.5 psi. That is the pressure I use for my Renesis.
>
> There is a calculator on the lower part of this page that will tell you what
> injector flow you will get with the fuel pressure changes.
>
> http://www.witchhunter.com/injectorcalc1.php
>
> Bill B
>
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
> Behalf Of Charlie England
> Sent: Saturday, January 19, 2013 10:43 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Renesis fuel pressure question
>
> While perusing an old document describing the then-new Renesis, I
> noticed that the fuel pressure was spec'd at 392kPa, which if Google is
> to be believed, amounts to 52psi. How many of you are running pressure
> that high? If you're not ( I seem to remember 30-35 for a lot of
> installations), how much does that affect injector capacity and fuel
> atomization (efficiency)?
>
> Charlie
>
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