flyrotary@lancaironline.net Mailing List Archive

Mike,

One way to test for intake manifold leaks is to pinch off hoses one by one while the engine is running to see if RPM decreases. You could also remove the each hose at the manifold an plug the inlet. Also be sure that the intake manifold gasket and throttle body gasket are sealing good and that all bolts are tight.

Jim

--- On Mon, 5/11/09, Mike Fontenot <mikef@apexconsultingservices.com> wrote:

From: Mike Fontenot <mikef@apexconsultingservices.com>
Subject: [FlyRotary] Re: Initial Tuning - Today
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Date: Monday, May 11, 2009, 3:50 PM

=== JIM,

I will look at what kinds of adjustments I can make on the Throttle Body. Wow, that is low RPM!. I had no idea. Problem is I don't know what I don't know.

>>> 1. Manifold leak - if this is the case it should be found and fixed before any tuning is continued. Check all hoses and fittings on the intake manifold and throttle body. Check that the throttle is closing all the way. It may need adjustment. <<<

What technique do you use for leak detection?

>>>2. Idle setting on throttle body not properly set. If the throttle body has a idle speed setting

screw (allows air after the throttle plate) try to turn it to reduce the idle.<<<

I will look for that.

Thanks again

--
Mike

================================
Mike Fontenot
Apex Consulting & Services LLC
Lakewood, Colorado
303 / 731-6645
mikef AT apexconsultingservices DOT com
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