Mailing List flyrotary@lancaironline.net Message #59818
From: Ernest Christley <echristley@att.net>
Subject: Re: [FlyRotary] Re: combo fuel pressure regulator/filter option?
Date: Wed, 22 May 2013 10:26:05 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

On May 22, 2013, at 10:18 AM, Charlie England wrote:

Good point. I wonder how the Corvette ECU handles it, & whether Tracy's ECU can be tuned to compensate.

Charlie

It's a tuning point.  If the pressure is higher, you simply program the ECU to open for less time at idle.  To get a really smooth idle, I had to program the MegaSquirt to only use one set of injectors below 2,000 RPM.  I use the injectors mounted in the block at idle.  Above 2000, the computer progressively brings the second set of injectors online so that there is a smooth transition from one set to both.




On 05/21/2013 11:11 PM, Bill Bradburry wrote:

Charlie,

You may want your pressure regulator to follow your manifold pressure.  This would be especially useful at idle if you were set at 58 lbs.  Injectors are flow rated at about 43.5 lbs, so at 58 they would put out more fuel than they were rated for, which could make getting your idle set correctly a problem.   Or maybe not??

 

Bill B

 


From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Charlie England
Sent: Tuesday, May 21, 2013 8:18 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] combo fuel pressure regulator/filter option?

 

Anyone seen one of these?
http://www.gmpartsdirect.com/results.cfm?addtocart=1&addpartnumber=19239926&singlepart=1&partnumber=19239926
(Other sites have pics; this was just the lowest price I saw with a quick search.)

I just saw it in a car magazine about an LS motor installation. Apparently, the pressure is set at ~58 lbs, but that's the approximate set point for RX-8 cars, right? I've already set up my dual fuel pumps, dual GM filters as used by Ed A, and an aftermarket 'hot rod' adjustable regulator, but this device looks attractive. The weight savings (& money savings) seem to make it an attractive option.The only downside that's immediately comes to mind is whether the entire assembly must be replaced to change the filter.

Charlie



Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster