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> Greddy Type S Question
turbohcar
post Aug 30 2005, 04:07 PM
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Just picked up a Greddy Type S second hand. Now, this thing has two vaccum ports on it. One is on the black "hat" cover and the other is in the aluminum casting part right under the first. Which one do I plug into the intake manifold boss and do I leave one unplugged or not? Pics to be posted later if we need them. Thanks


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turbohcar
post Aug 30 2005, 06:29 PM
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Hmmmmm.....vaccum you say Sherlock? Well then my testor is wrong.

I assumed that when you let off the gas that there would be pressurized air backed up against the valves when you let off the gas in the intake manifold (where the boss for the BOV line feed is) which would slowly bleed off as the car slowed down (while the car is slowing down in RPM). Why is the intake manifold in vaccum while the intercooler pipes, before the throttle body plate, have positive pressure?


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