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post #1 of 2 (permalink) Old 03-11-09, 11:56 AM Thread Starter
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Intake manifold for monster miata

I'm building a Monster Miata with a Simpson Design Italia body kit. I've taken an HO 302 to 347 CI, with K-B forged aluminum pistons etc. and AFR aluminum heads.

Because of the limited hood clearance, I'm not sure what to do about intake. My desire is to stick with fuel injection but want the lowest possible height, for the intake/manifold combination, that will give my heads enough air.

Can anyone please give me some advice, in this regard?


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post #2 of 2 (permalink) Old 03-19-09, 11:53 PM
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Join Date: Jan 2007
Location: Northern Iowa
Posts: 174
Re: Intake manifold for monster miata

Obviously many feel threatened by your Miata mix. Good luck with your build.

I have seen a Ford Motorsport GT-40 tubular upper intake that was shortened top to bottom and right to center. The cut the base off the tubes- shortened it- welded it back and then did the same with the right side. They also had the top of the lower intake planed down.

It looked like the intake was very close to the valve covers and I believe they were stock. I would guess you would need to watch out for clearance on the throttle body side too.

With shortened intake runners- you will loose a little torque- but with those AFR's- you will probably gain it all back.

Another idea is to cut the bottom and the throttle body mounts off of your current upper intake and weld up an alluminum bread box design. You can loose alot of torque if you use this design and do not have it supercharged. Should you choose this design without a supercharger- keep your small throttle body to keep the car from falling on it's face.

I also saw a design where someone had converted a carb intake to fuel injection by drilling and welding injector bungs- then bolted an angled pipe to the carb mount. It was supercharged which might mater too.
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