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I know the ZD30 had the swirl flaps in the intake manifold but do they also have the swirl ramp in the port bowl itself? I can't find any pics to verify, pics of other engines to explain what I mean by intake swirl ramp.

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GUII ZD30DI Wgn
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I took a DI head down to Eclipse for sectioning when they first started (bloody valve seats ruin power saw blades I can tell you), maybe drop in there and have a look It was still around last time I was down there. I've got pics somewhere but I'll need to do a search, the DI and CRD heads have complicated passages which could be interpreted in many ways.
 
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