[Amc-list] Intake manifold question

[Nick ALFANO <71amx@xxxxxxxxxxxxx>]

Although I agree with the Performer on a 360, it is questionable on a 401 as being my choice over the others out there.  If I was looking for improved fuel economy and low end torque while still getting hp when I needed it on a basically stock 401,  I would consider the Offy Dual Port (Dual Port not Dual Plane).  I agree with the Airgap not being the best if you are going to drive this vehicle in the cold months of the year where the temps are below 45 degrees.  Not only does it not have a heat cross over as stated, it also has as the name implies a gap between the runners and bottom pan.  This causes a much cooler intake charge that will hurt fuel mileage as well as take much more time before it warms up and runs good.  The R4B would be a good choice.  This will give you good power throughout the range for a stock 401.  Another good choice and better in my mind would be a Rebel Machine intake if you can find one.  Clean up the
 #5 runner a little so it gets equal flow to that cylinder and you will have an intake that pulls hard all the way to 6000 rpm, works well in cold weather and gets decent mileage.  A lot of this depends on how you will use the vehicle as with most power upgrades.  They all have their place but there isn't one that will do all.
 
Nick,
 Alfano Performance
4849-76 st.
Kenosha, WI. 53142
262-308-1302
262-942-8271 after 6pm central and weekends 
 
 
Message: 2
Date: Mon, 21 Jul 2008 17:46:15 -0600
From: James Shadwick <idahoAMX@xxxxxxxxx>
Subject: Re: [Amc-list] Manifold question
To: "AMC/Rambler owners, drivers and fans." <amc-list@xxxxxxxxxxxx>
Message-ID: <48851FC7.7060007@xxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
If it is mostly a street driver I would go with the Performer.....the 
Air Gap is an updated version
of the R4B....and does not work well in cool weather no heat 
crossover...the R4B is a good manifold
and works year a round.....I have one on the 360 in my AMX and I have a 
Performer on the 360
in my Jeep GW....I like them both....have not tried the Air Gap yet.....
Jim

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