Primary pipe size for turbo manifold.
About to start building a single turbo manifold for a 346 ls1, what size primary pipes should we go for, want it to spool up pretty quick and have potential for 600hp plus at wheels.
Looking at using MP T70 or MP GT45.
cheers
John
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1 5/8 is doable, but a T70 is small so I would think you wouldnt need small tubes to help it spool. You can use 1 3/4.
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on same manifold,
