rayaapp2 Posted January 2, 2011 Share Posted January 2, 2011 Im going through a set of 40PHH side drafts to put on my 240Z. They came with K&N air cleaners and a set of big air horns. Horn Measurements in mm carb small side ID ~48mm big side of horn is 80mm OD height is ~50mm Then we have the 40PHH filter side measurements. Inside I find a step? Why is it stepped? It goes from ~48mm down to ~41.5mm in sharp 90° angles. ~3.25mm step for what? Maybe it has provision for a special slide in air horn(not the outer bolt on kind)? In any case the Air Horns I have do not appear to be functional with my setup. They are far to big, and the outer radius doesnt appear to be ideal for air horn functionality either. Am I correct in my thinking here that these things are just bling? Quote Link to comment Share on other sites More sharing options...
Tony D Posted January 2, 2011 Share Posted January 2, 2011 (edited) Why is it stepped? Because in Toyota OEM applications that was a removable part. It allows the same venturis to be transferred from the stock 40PHH to a set of 44phh's that you put on the manifold after you port the head and manifold. Early 18RG and 2TG's used these carbs. I have a few with that removable venturi. Matter of fact, there is a set of them on a VARA 510 that I lent for the cause.... Horns you got sound like standard parts for a 44PHH. Edited January 2, 2011 by Tony D Quote Link to comment Share on other sites More sharing options...
madkaw Posted January 2, 2011 Share Posted January 2, 2011 Glad you asked about that"step", since I have looked at the same thing on my 40phhs and wonderwed what it was all about. I thought maybe my very complete kit was actually missing something----I guess not. Still make me want to fill the gap with something though! Quote Link to comment Share on other sites More sharing options...
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