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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old Dec 31, 2003 | 04:23 PM
  #1  
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hugeion
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performance upgrade

I have 1990 f150 351w I was wondering if I could change the injection system to a carb and keep it legal I live In tx we have emissions testing
 
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Old Dec 31, 2003 | 05:36 PM
  #2  
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Just curious...why do you want to change it over?
 
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Old Dec 31, 2003 | 05:39 PM
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modru2004
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indeed. why switch over. better milage and better performance than a carb. if you just switch over to carb your gonna get worse performance and gas milage.
 
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Old Dec 31, 2003 | 10:48 PM
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If you switch over, you should stay within legal limits of exhaust emissions if your cats are not all used up. But that doesnt matter, cause you dont want to switch. I see nothing good coming from the switch. Ofourse the parts dealer wants you to believe its a great idea.
 
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Old Jan 1, 2004 | 08:27 AM
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From: Dallas, Texas
Why? Well, going from stock, you would gain ALOT of power throughout the rpm range if you chose the right carb and intake. Plus it is much much cheaper than comparable efi parts that will produce the same results.
That said, you would lose the driveability that your efi offers you. As well as the ability to pass a visual emmision inspection for your year model.
So the short answer is no, it won't pass. But it would improve your performance.
 
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Old Jan 1, 2004 | 11:47 AM
  #6  
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modru2004
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From: Wichita Falls
not if he switched over to near stock carb. he woul dhave to get a demon or holly carb for performance to get anything from it. but he can do some work on his efi for higher performance as well even if it is more expensive. simply put its not something i would recommend for a daily driver. it may not be i dunno.
 
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