does anyone know if the ETA intake manifold will flow more than the "i & is" manifolds. also will it bolt up? I am getting ready to get a head and a mani to port and pollish. I didnt know if anyone has ever done this. This will also be for a turbo.
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1989 Turbo 325is
87 ETA Dinan Stg 2 -
The reason no ones ever done it is because the answers no.
The I manifold, just by comparing the two, obviously has a lot more surface area inside than a Eta manifold. Just use an I manifold.- Sean Hayes -
I used the eta manifold (ported) when I did my head work and cam thinking it would give me good low end and alright top end.
I went to the i manifold and i lost no low end and gained much more mid range and top end. (I also switched to the motronic 1.3)Old and improved:
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