And they are roughly the same as the Stillen.
Greddy: 4X6X8 = ~192c.i.
Stillen = 3.5X9X8 = ~252c.i.
Z1 = 4.5X7X8 = ~252c.i.The cores are all different from each other in terms of their design which is going to make the comparison not *exactly* the same in terms of volume and efficiency, but the rough figures show that the Z1 is very comparable to the stillen in terms of volume. The intention was to make an intercooler that fits well and has greater flow capability than stock. The larger frontal area of the Stillen is going to add to the efficiency of the core since it will be impacted by a greater area of cool air, but you must have the Stillen ducts (~$250) in order to take advantage of the frontal area of their core. The price of their intercoolers and ducts is around ~$1300 and they pose problems with fitment as they interfere with the sidemarker lights. The Z1 intercooler uses stock ducting and although it doesn't have the larger frontal area, it has a thicker core to make up the difference. All of the cores have the same running length so the pressuredrop associated with the different designs will be limited solely to the core's internal structure. The Z1 core uses less but taller running veins for the air to pass through than the stillen which IMHO is going to flow air better as the change in velocity of the gases will be less with the Z1 core. Bigger changes in velocity = less efficient. But we will see how things pan out on the dyno once we have our "battle of the cores" dyno-day.
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[ agpowers@bellsouth.net ] [ Zemulator Information Sheet ] [ Z1 Motorsports Website ]
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