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Old 10-22-2007, 02:48 AM   #13
Ivan D.
glamoros piece o' lowlife
 
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Join Date: Mar 2007
Location: Redford, MI
Posts: 1,164
Re: Aluminum vs. Iron intake

I have some weird Offenhauser intake in my 350, tis a split-port runner design (about 1:2 ratio) and the primaries feed the smaller part whic theoretically keeps the airspeed high. This intake design is good for low-rpm torque and supposedly dies up high, but hey, my usual operating range is 1000-2000rpms so I really couldn't care less how it flows at 5-6k. Now I don't have actual sheets with the old and the new intake data, but the butt dyno tells me the split port design works well for what I want from it - honestly, at 2k rpms the truck feels like it can climb vertical walls! I've been told that this whole split-port deal is an outdated concept, but Summit still carries several models of these intakes, if anyone is interested here they are:

http://store.summitracing.com/egnsea...rdSearch#rstop
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