performance question
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Junior User
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performance question
i have an 03 f150 4.6 5 speed, i have the kn intake, superchips programmer, and true dual exhaust, 2.5 in pipe with no mufflers, would shorty headers be a good idea? bein that i have exhaust with no mufflers and the programmer. would a bigger throttle body or a better mass air flow sensor be a problem either? and what kind of performance gains would you expect out of these other modifications?
Post Fiend
Joined: Jan 1997
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From: Enjoying the real world.
Headers are a good idea if you can keep the intake air charge cool. Wrap the headers and use a cold air intake kit. A larger MAF will require custom programming if the MAF isn't calibrated correctly. I can't tell you the performance you'll get, there are just too many combinations of parts and factors with any custom combination.
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Junior User
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i have a cold air intake on it, its one i got from ebay, the chrome pipe with the open air filter with no box, what do you mean by wrap the headers? what is calibrated on the MAF? about what do you get with these modifications on a stock vehicle? and is this ok with the programmer?
Posting Guru
Joined: May 2003
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From: York, NE
No, it has to have a heat shield so that it doesn't take in the hot air under the hood, otherwise it is just an intake. Better than stock, as far as power goes, but not mileage. A cold air kit will bring in much denser air and give you better power and mileage.
Post Fiend
Joined: Jan 1997
Posts: 23,165
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From: Enjoying the real world.
Originally posted by The Phenom
i have a cold air intake on it, its one i got from ebay, the chrome pipe with the open air filter with no box, what do you mean by wrap the headers? what is calibrated on the MAF? about what do you get with these modifications on a stock vehicle? and is this ok with the programmer?
i have a cold air intake on it, its one i got from ebay, the chrome pipe with the open air filter with no box, what do you mean by wrap the headers? what is calibrated on the MAF? about what do you get with these modifications on a stock vehicle? and is this ok with the programmer?
MAF's send a reading to the computer based on air flow. The computer expects a specific reading for a specific volume of air. Aftermarket MAF's need to be calibrated to give the correct reading for the application they will be used for. If it isn't then the air/fuel ratio will be wrong, most likely too lean.
I highly recommend you spend some time in the engine forums on this site before doing any of the mods you mentioned, so you can get a solid understanding of exactly what your changes are doing and why. Don't bolt something on the engine because you heard its a good thing. Learn the how's and why's of the parts first. It will save you money in the long run.
