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Old 03-31-2010, 07:06 PM   #1
2nd Gear Member
Join Date: Aug 2007
Location: toronto
Posts: 51
E36 325 is M50

I Instaled Headers on the engine and and converted the dual pipe into a single and put 1 cat back in but car feel's slower maybe lack of backpressure does anybody know anything or anybody who knows a proper balance for these engines
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Old 04-01-2010, 08:59 AM   #2
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Location: Ottawa
Posts: 288
Yes, Stock is probably the best setup IMO. You probably lost a bunch load of torque by opening it up like that.
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Old 04-01-2010, 10:05 AM   #3
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It was probably moved higher in the rpm range. Get (or make) and intake, then get software for these mods ... it will work much better. Cams is another big power changer ... M3 cams do wonders!
2007 BMW 328Xi Touring, 6 speed
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Old 04-01-2010, 12:11 PM   #4
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I dont understand why everyone jumps to do exhaust work on these motors. They dont flow that poorly.

I doubt your loss in power is due to lack of backpressure.
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Old 04-01-2010, 08:39 PM   #5
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It Pulls good till 4thousand RPM than flatens out with no pull at all as if the stock cat is restricting flow maybe it is because origionally it's ment for 3 cylinders to exhaust threw it not all six maybe if I just put on a high flow magnaflow cat will solve my problem somebody in the maxbimmer community must have made a similar setup P.S I do have a PRM intake no chip yet my car must weigh 200 lbs less since I removed the stock setup and it sounds great but slow as hell midrange
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