New 8.1 intake manifold?
May 1, 2003 | 08:36 PM
#1
New 8.1 intake manifold?
We should have this available in the near future -
The new futuristic hi-performance intake manifold was developed by Arizona Speed & Marine. The profile and design is a two fold configuration, it has long intake runners and a large plenum that helps increase velocity for high horsepower custom EFI marine engines, combined with a very low profile which is only 1” higher than the OEM manifold. It is a unique two-piece design that allows servicing and setup of the injectors without removal of the complete manifold. Removal of the plenums portion (top half) exposes two o-ring grooves around the perimeter of each side providing for a perfect seal.
Testing of the new cast piece vs. the earlier mocked up model tested at Flagship Marine Co. and Tyler Crocket Marine has shown so efficient that the standard 75mm GM Throttle body is not adequate enough for the volume of air that the engine requires when using this manifold. A new larger AS&M 85mm throttle body is now being developed that is mechanical actuated linkage, rather than the larger motorized (drive by wire) model that GM currently offers. It has been configured to work GM Fuel Injectors, Throttle Bodies and controlled with the new MEFI 4A Controller.
This manifold has been dyno tested on a large displacement modified version of the new 8.1 litre (HP3) engine family. With the addition of this manifold and other specialty parts it produces 600+ horsepower from only 535 cubic inches on only 89 octane.
Tom
The new futuristic hi-performance intake manifold was developed by Arizona Speed & Marine. The profile and design is a two fold configuration, it has long intake runners and a large plenum that helps increase velocity for high horsepower custom EFI marine engines, combined with a very low profile which is only 1” higher than the OEM manifold. It is a unique two-piece design that allows servicing and setup of the injectors without removal of the complete manifold. Removal of the plenums portion (top half) exposes two o-ring grooves around the perimeter of each side providing for a perfect seal.
Testing of the new cast piece vs. the earlier mocked up model tested at Flagship Marine Co. and Tyler Crocket Marine has shown so efficient that the standard 75mm GM Throttle body is not adequate enough for the volume of air that the engine requires when using this manifold. A new larger AS&M 85mm throttle body is now being developed that is mechanical actuated linkage, rather than the larger motorized (drive by wire) model that GM currently offers. It has been configured to work GM Fuel Injectors, Throttle Bodies and controlled with the new MEFI 4A Controller.
This manifold has been dyno tested on a large displacement modified version of the new 8.1 litre (HP3) engine family. With the addition of this manifold and other specialty parts it produces 600+ horsepower from only 535 cubic inches on only 89 octane.
Tom
May 2, 2003 | 06:21 AM
#3
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From: Anderson, Indiana
Re: New 8.1 intake manifold?
Manifold looks good!
It looks like it will accept the stock TB if desired; that's a plus. It would be interesting to see the fuel rail required to reach down to each injector.
We're setting up an 8100 right now for street rod use, and the stock manifold leaves a little to be desired in the looks department, unless you use the plastic Vortec cover.
Any pricing info yet??
It looks like it will accept the stock TB if desired; that's a plus. It would be interesting to see the fuel rail required to reach down to each injector.
We're setting up an 8100 right now for street rod use, and the stock manifold leaves a little to be desired in the looks department, unless you use the plastic Vortec cover.
Any pricing info yet??
May 5, 2003 | 11:54 AM
#5
Re: New 8.1 intake manifold?
The stock throttlebody won't bolt upto this manifold (note 4 bolt holes). They have a modified throttlebody that can be used. I'm waiting for pricing and will also check into the traction bars.
Tom
Tom
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