Hey thanks for following. As I watched the dyno results (mainly the vacuum readings) from the diffrent intake manifolds I am guessing on what I might need next. The stock mani with out the VI working (only short runners working), and having the "twiggys" AKA stage 3 N/A cams worked great up until 6K or so. Then the vacuum would spike up and down, just like ICE experienced. Then I got the VI working the long and the short runners, switching at 5250RPM. The vacuum reading would go crazy from 3500 to 5250 till the short runners would switch open, and calm back down until 6K again. I then put on 626 mani with even longer runners (yet nice and smooth with no bs to go through) and that made the vacuum spikes the worst yet so far.The results are extremely relevant to my interests.![]()
My super lame theory is that short and fat runners might make this thing breath ok. yes... just ok. I know going to ITB's will liberate this motor, and changing stack lengths easy, but at a cost. A cost at the dyno w/tuner guy.
IF
you are running stock or J-spec cams you will most likely be loosing power by doing this IM shtuff. As you need to keep a nice velocity ramming a column of air into your tiny bit of scavenging effect mazda spec ed into the stock system. However with the amounts of air the stage 3 cams need I hope I can satisfy them with this cheaper solution than ITB's as I need to also get the brakes %100 and also pay for a few more races to keep my racing license current. THIS YEAR. and pay morgage, and bills and feed myself and pay for gas to get to work ect.. ect..
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