Return-Path: Received: from mailc.telia.com ([194.22.190.4]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Sat, 13 Jan 2001 12:13:32 -0500 Received: from d1o9.telia.com (d1o9.telia.com [194.236.185.241]) by mailc.telia.com (8.11.0/8.11.0) with ESMTP id f0DHLpU27123 for ; Sat, 13 Jan 2001 18:21:51 +0100 (CET) Received: from telia.com (t5o9p75.telia.com [62.20.231.165]) by d1o9.telia.com (8.10.2/8.10.1) with ESMTP id f0DHLor26027 for ; Sat, 13 Jan 2001 18:21:50 +0100 (CET) Message-ID: <3A608FDF.922FDDBA@telia.com> Date: Sat, 13 Jan 2001 18:26:56 +0100 From: Martin To: flyrotary@olsusa.com Subject: Re: 13B rpm (was...???) References: <3A5E705A.D12549D6@Qwest.net> <000601c07c46$f9518c80$6a5ba318@carolina.rr.com> Reply-To: flyrotary@olsusa.com Mime-Version: 1.0 Hi Ed !!

Ed Anderson wrote:

I believe all 13Bs in autos use staged injection where only the primary
injectors are on under a certain manifold pressure and rpm (I believe around
2500 rpm) with the secondary injectors joining the primary injectors above
that set point.
The RPM where this happened is 3800 - 3850.
This is known as the 3800 hesitation, when the injectors are worn and the pump flow are low (old fuel filter etc..) the engine will stumble at that rpm.
That's in the car, of course

Just 4 your info....

Regards !

Martin