Jlt 2006 V6 Cai

Casper98GT · February 11th, 2008, 11:04 AM

I am installing on someones and in the instructions it says MUST HAVE A TUNE. Im not understanding why? Anyone install without a tune? Since when does it matter if you have a tune or not for a k&N filter

GreenFaleen · February 11th, 2008, 11:07 AM

it needs one, becasue of how JLT set their stuff up, 05+ cars need a tune for most intakes on the market

Cricket · February 11th, 2008, 11:08 AM

the spanish oak software is crazy. It will make the car really lean without a tune. A lot of them can get away without a tune, but plenty will run lean without a tune whenever you mod the car at all.

*edit* - seriously GF...are gonna do this again? I forgot how we both posted the same stuff around the same time.

bone_crusher · February 11th, 2008, 11:16 AM

cold air intake
the guy on that fourm say you need a tune becuase its sucking in more, colder air than the stock one

Casper98GT · February 11th, 2008, 04:45 PM

I had never installed one, but i figured it out once i opened the kit. Its the same as any vehicle, you get a bigger MAF you need bigger injectors. Or a tune. This kit comes with a aftermarket MAF housing, that allows for more air. Good idea, but you now need a tune because without more fuel youre correct youre going to run lean. Pretty simple idea i guess. Good way to make money off of a tuner.

Juggalo_X · February 11th, 2008, 04:53 PM

You need a tune because the MAF housing is larger then the factory unit. in turn throws off the MAF sensor. I beleive the have to modify the MAF transfer functions in order to compensate for the larger MAF housing.

Juggalo_X · February 11th, 2008, 04:58 PM

Also the reason you run lean is because the maf is taking say a 2.5V reading at Part throttle. With the larger MAF housing. But with the stock maf housing the same Throttle position might make the maf output a 3.0V reading. so essentially the MAF reports its getting less air passing through then it actually is because its calibrated for the smaller housing that doesnt allow as much air to pass by the sensor relative to that throttle position. so then its getting to much air but the injectors are of course putting out fuel for the amount of air the maf thinks its drawing in. then at the end of the chain is your O2 sensors which start to throw a lean code because there is way to much air in the emmisions according to what the pcm thinks there should be relative to the MAF's reading. and this is true. why because the larger maf housing.

Casper98GT · February 12th, 2008, 08:05 AM

yeah....i know all about it. Just didnt know the kit came with a bigger unit.

Juggalo_X · February 12th, 2008, 09:40 AM

Originally Posted by Casper98GT

yeah....i know all about it. Just didnt know the kit came with a bigger unit.

thats cool man, Just explaining it so any one who didnt know would

February 11th, 2008, 11:04 AM	#1
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	Jlt 2006 V6 Cai I am installing on someones and in the instructions it says MUST HAVE A TUNE. Im not understanding why? Anyone install without a tune? Since when does it matter if you have a tune or not for a k&N filter __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

February 11th, 2008, 11:07 AM	#2
GreenFaleen MM's Resident Ricer 2006 Scion tC 13.001@113 Join Date: Nov 2006 Location: Raleigh/Lenoir, NC Posts: 9,880 Blog Entries: 2 iTrader: 1 reviews	it needs one, becasue of how JLT set their stuff up, 05+ cars need a tune for most intakes on the market __________________ Scion Tc Turbo - 9psi 297whp 287wtq 2500lbs :p MM 4 Banger club: Senior Ricer NCMM #9 "Horsepower sells cars, torque wins races." -Carroll Shelby

February 11th, 2008, 04:45 PM	#5
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	I had never installed one, but i figured it out once i opened the kit. Its the same as any vehicle, you get a bigger MAF you need bigger injectors. Or a tune. This kit comes with a aftermarket MAF housing, that allows for more air. Good idea, but you now need a tune because without more fuel youre correct youre going to run lean. Pretty simple idea i guess. Good way to make money off of a tuner. __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

February 12th, 2008, 08:05 AM	#8
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	yeah....i know all about it. Just didnt know the kit came with a bigger unit. __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

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February 11th, 2008, 04:53 PM	#6
Juggalo_X I Post Entirely Way Too Much 2001 Mustang 232/CBR600 14+@Slow Join Date: Jan 2007 Location: South Western Ontario Posts: 6,688 iTrader: 0 reviews	You need a tune because the MAF housing is larger then the factory unit. in turn throws off the MAF sensor. I beleive the have to modify the MAF transfer functions in order to compensate for the larger MAF housing.

February 11th, 2008, 04:58 PM	#7
Juggalo_X I Post Entirely Way Too Much 2001 Mustang 232/CBR600 14+@Slow Join Date: Jan 2007 Location: South Western Ontario Posts: 6,688 iTrader: 0 reviews	Also the reason you run lean is because the maf is taking say a 2.5V reading at Part throttle. With the larger MAF housing. But with the stock maf housing the same Throttle position might make the maf output a 3.0V reading. so essentially the MAF reports its getting less air passing through then it actually is because its calibrated for the smaller housing that doesnt allow as much air to pass by the sensor relative to that throttle position. so then its getting to much air but the injectors are of course putting out fuel for the amount of air the maf thinks its drawing in. then at the end of the chain is your O2 sensors which start to throw a lean code because there is way to much air in the emmisions according to what the pcm thinks there should be relative to the MAF's reading. and this is true. why because the larger maf housing.

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