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Originally Posted by graham bahr
when i arrived at the optimum inlet trumpet length after many hours on the rolling road, i meassured the total intake length from the back of the valve to the end of the trumpet, it was exactly the same length as the exhaust primaries.
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Now that is interesting...
Maybe rather than looking at the intake to the turbo, it might be productive to look at a "branch manifold" between the turbo and the head... A mirror image of the exhaust manifold (in length) perhaps?
(I'm assuming multi-point injection just before the head)