=20 Sent: Friday, October 26, 2007 10:49 AM Subject: [FlyRotary] MAP port location What is the best location for MAP ports on the intake. Close to the engine or further away? I have the modified Renesis lower manifold that has two ports installed. Are these the best locations for the EC2 or should I place new ones further back in the upper manifold? =20 Thanks, =20 =20 Bobby J Hughes =20 =09 ________________________________ =09 -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html =09 ------_=_NextPart_001_01C8181F.3BA94B24 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Ed,

The ports in the renesis lower manifold are = at the=20 primary and secondary runner join. The stock upper renesis manifold also = has=20 other ports as well. Not sure what they are for in the car. I need to = get the=20 shop manual out and do a little research.

Bobby

From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of Ed=20 Anderson
Sent: Friday, October 26, 2007 3:18 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: MAP port=20 location

It'll work just about at any location. = But, you=20 generally want a location that will reflect the total engine condition = rather=20 than say one runner. Besides there are some fairly substantial = pulsation=20 in the runners. I prefer to have the sensor in the plenum = immediately=20 after the throttle body, but out of the way of the air flow at this = point the=20 pressure changes in your plenum probably reflect the over all (average) = of what=20 is going on in your runners. The pressure wave travels at the = speed of=20 sound whereas the air mass travels less than 400 ft/sec (much less in = most=20 cases), so where ever you put the sensor - even down my the ports, it = won't=20 matter timing wise.

However, a location where the pulsation are = damped is=20 where I would put it. In the plenum after the throttle body and = out of the=20 direct air flow path. On the other hand, I have used the ports on = the=20 stock lower manifold (tying together the primary and secondary ports = with a "T"=20 so as to better get an average).

Some folks have used a dense air filter/fuel = filter? to=20 damp out the pulsation, so if you are going to run your manifold like = off a tube=20 near a port, that is what I would try as well.

----- Original Message -----=20

From:=20 Bobby J. = Hughes=20

To: Rotary motors in = aircraft

Sent: Friday, October 26, 2007 = 10:49=20 AM

Subject: [FlyRotary] MAP port=20 location

What is the best location for MAP ports on = the=20 intake. Close to the engine or further away? I have the modified = Renesis lower=20 manifold that has two ports installed. Are these the best = locations for the EC2 or should I place new = ones=20 further back in the upper manifold?

Thanks,

Bobby J=20 Hughes

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