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  #1  
Old 04-04-2011, 09:47 AM
ivan01ranger ivan01ranger is offline
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Join Date: Jul 2010
Posts: 2
Default Backpressure loss while dumping exhaust?

i have my 01 3.0l ranger
i have read that dumping/side outlets lose backpressure reducing mpgs
tis true?
40series flowmaster dumped
should i upgrade the cats and or new exhaust kit ?
i noticed my truck sucks gas for a lil 3.0l with the exhaust being dumped


any suggestions
thanks
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  #2  
Old 04-04-2011, 09:50 AM
AlxGry AlxGry is offline
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Posts: 670
Default Re: Backpressure loss while dumping exhaust?

4.0l sohc with no muffler period stops after last cat and i got 14mpg last check, and that was like an eigth inch below full from start of calc to gas light. Im currently doing acheck on it now too from over full to gas light after my body lift. Ill let you know.
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2001 Ranger Edge Super Cab
4.0L SOHC 4.10 l/s Rear
3" Summit Body Lift
15x10 D Window Rims 3.76" Backspace
33x12.50 Goodyear Duratracs
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  #3  
Old 04-04-2011, 10:24 AM
Dabiscuit Dabiscuit is offline
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Default Re: Backpressure loss while dumping exhaust?

I have my exhaust dumped and didnt notice any difference in mpg's. Definately has less back pressure than it use to.
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  #4  
Old 04-04-2011, 10:27 AM
matt224 matt224 is offline
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Join Date: Jan 2011
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Default Re: Backpressure loss while dumping exhaust?

backpressure is nothing, it isn't needed nor does it exist. If you are going to upgrade your exhaust to get more of the gases OUT of the engine, why would you need a pressure buildup going in the opposite direction? You shouldn't lose anything if you dump the exhaust before the rear tire. However, you still need ample exhaust piping for the exhaust gases to cool, and contract while inside the exhaust piping, as this will create a vacuum and help speed up the flow of the exhaust gases; this is in no way "backpressure" as people try to refer it to.
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  #5  
Old 04-06-2011, 08:58 PM
RedNeckMetalTruck RedNeckMetalTruck is offline
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Join Date: Mar 2011
Posts: 15
Default Re: Backpressure loss while dumping exhaust?

No muffler. Dumped down. I get 16.5 on trips from San Jose to Tahoe.
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2001 Ranger Ext cab XLT 4x4. 4.0 SOHC. Throttle Body Spacer. Cold Air Intake. Hi-Flow Cats. No mufflers. 32x11.5x15 BFG AT's.
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