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Author Topic: How much is really gained from manifold spacer? Dag302 ¯ Member # 4682 posted                              If I do not use the 1" spacer with my manifold I can use my stock hood. How much is really gained from the use of the spacer? -------------------- 04 Expedition 4X4 93 Cobra #822 96 Cobra Posts: 2842 | From: Sacramento | Registered: Jul 2004  |  : 93PONY Mr. Valve Events Member # 60 posted                           1" adds to the runner length so you'll gain low-end TQ. If you're asking how much is gained by keeping the intake cool....that depends. If you're still running an EGR valve & spacer, there's no real gain as the EGR lets in hot exhaust gasses & the spacer has hot water running through it. Eliminate the EGR & spacer it the intake spacer will help to keep the upper cool. I've seen consistant 12-15HP on N/A motors from cooling off the upper intake & keeping the bottom end hot. But this was done on a dyno with a fan & a bag of ice on the intake manifold....so the #'s are gonna be higher than what you'd gain from a spacer on the street/strip. -------------------- www.advancedenginedevelopment.com SCT dealer Dynotuning (916)715-7569 Posts: 4265 | From: Fair Oaks, CA | Registered: Nov 2000  |  :

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