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  #1  
Old 01-23-2010, 03:20 PM
carneyboy91 carneyboy91 is offline
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Default fuel injection and no back pressure is ok because the computer makes up for it?

me and one of my buddies go muddin alot (and break things) and hes got a 2.9l bronco 2 (fuel injection, no cat only glass pack after exhaust manifold...) and i got a 3.0l ranger (fuel injected cat and glass pack)

from my slight engine knowledge i came to the conclusion that fuel injection engines gas/air mix will be right no matter how little/much back pressure

and carbuereatuers are set at one single gas/air ratio which leads to f#&ked up engines when no back pressure

am i correct at all?

please help
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  #2  
Old 01-31-2010, 10:02 PM
sho_or_go sho_or_go is offline
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i'm not 100% sure about that one but it doesn't sound right, but iv'e been wrong at least once before so... lol. i don't think your computer will make up for lost back pressure.

but if it does i think (know) there will still be a loss of power

someone please correct me if i'm not right
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Last edited by sho_or_go; 01-31-2010 at 10:04 PM.
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  #3  
Old 01-31-2010, 10:15 PM
Jp7 Jp7 is offline
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Because I don't have time to fully explain how and why I'm going to just do this...

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Old 01-31-2010, 10:29 PM
sho_or_go sho_or_go is offline
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Because I don't have time to fully explain how and why I'm going to just do this...

can you specify who that was to please?
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Last edited by sho_or_go; 01-31-2010 at 10:36 PM.
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  #5  
Old 02-04-2010, 06:51 PM
98blownranger 98blownranger is offline
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you need some backpressure, the amount you have can change the power and tourque output at different rpms. if no backpressure was good drag cars would not run headers at all. just a open port on the block
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98blown you should be an MD! that's the same stuff my doc asks and ur spot on man!!!
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Old 02-04-2010, 07:31 PM
Jp7 Jp7 is offline
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Originally Posted by 98blownranger View Post
you need some backpressure, the amount you have can change the power and tourque output at different rpms. if no backpressure was good drag cars would not run headers at all. just a open port on the block
Your confusing backpressure with exhaust flow speed.
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I'm dying to see this at night. Someone go tell the sun to give up already.
Quote:
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Your the man, you bring our dreams to a reality within the lighting spectrum
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Jp7 you always do AMAZING work! Hats off to you sir
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  #7  
Old 02-05-2010, 09:36 AM
carneyboy91 carneyboy91 is offline
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maybe this is a bettr question what is the best sounding, best for engine, best gas mileage exhaust setup?
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  #8  
Old 02-05-2010, 10:25 AM
sho_or_go sho_or_go is offline
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ummm....stock? maybe a thrush turbo muffler. not a glasspack. not -cat.
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  #9  
Old 02-06-2010, 03:08 PM
THE H.P FREAK THE H.P FREAK is offline
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HI!... Read...... learn......


http://www.cobbtuning.com/info/?ID=3222
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