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ORIGINAL: PipsBlackStang
I see where your coming from but wouldnt the spacer help that out? And if so wouldnt a 70mm t/b and spacer be more productive then a stock 56mm??(I think the stocks are 56 or so)
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The TB on the stock 94-98 is 50mm and the stock on a 99+ is 60mm. A spacer does almost nothing for your engine. All it does is add runner length for the intake spacer and for the TB spacer it adds plenum volume, but in the wrong areas. But they can create a small amount of torque but at the cost of horsepower. Torque is good down low and for getting you off the line, but once you're moving, horsepower is all that matters. Now your 99+ intake has been engineered for maximum flow for a stock engine, for the layman. Plus 40 hp is quite a bit. In the long run the spacer may end hurting you by causing the air to travel to far and not be able to reach the cylinders. To achieve a better flow in your intakes you need to do some serious porting. You need to remove the two post in the upper's crossover tube, and you need to enlarge the runners about 1/4" atleast to gasket match your intakes. If you ever take your upper apart, have you noticed that the runner holes in the gasket come no where close to the manifold runner holes? And I guess you can say a 70mm is more productive, but that's because it's bigger, it'll always flow more air.