Topic: cheap home made intake

[polkcountysfinnest]

OK so I wanted to put on an intake but did not want to pay for those after market ones that come with the cheap filters. Then have to buy a K N filter since that is what i wanted. K N does not make one for my jeep to my knowledge. I wanted to use a K N air filter since i know that these really work and do what they say they do. So i built one of my own and only spent 69.99 for the K N filter,.99 For the coupler, 35.99 for the pipe and about an hour of my time. So here are some pics of the build

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[lanulos89]

nice look xacly like mine but i spent 30 for the whole thing.

[wrangler387]

^ 30 bucks and you got a new K&N filter? where at?

Good job on using a K&N polkcounty.

[lanulos89]

it came with a a ghetto k&n but still worked, i just bought a k&n recently to replace the p.o.s.  got it on ebay

[polkcountysfinnest]

thanks wrangler387 i like these air filters because i have done test with all of the so called power adding filters and K N was the only one who did what it claimed to do. I used a water manometer to do these test.(it messures air flow restiction) The K N on a v8 actually had less restiction than a one with no filter

[lutzke21]

thanks wrangler387 i like these air filters because i have done test with all of the so called power adding filters and K N was the only one who did what it claimed to do. I used a water manometer to do these test.(it messures air flow restiction) The K N on a v8 actually had less restiction than a one with no filter

So you're saying that having NO FILTER is more restrictive than a K&N FILTER?  Somehow common sense is telling me something different.

Does the K&N flow better, yes...  Better enough to make an impact on your performance?  In our circles, extremely doubtful.  Just so everyone is aware, better flow = worse filtration, better filtration = worse flow.  Can't have both.  So, do you want a negligible amount of increase in hp/torque, or engine longevity?  If you need the ~0.14% increase in performance, spend your money.  (BTW, the difference in filtration is also within 1%, per K&N's claims... But 1% over many miles...)

If you want more air, do the throttle body conversion.  But make sure you're engine breathes clean air.

(jumps off thread hijacking soapbox)

[wrangler387]

Its a good thing there is more to a product then common sense. A lot of K&N filters have a velocity stack built into the base with a large filter, which the filters flow very well AND filter very well. this large filter covers a large surface area which provides more then enough air for the motor. That is how it outflows no filter, the filter is excellent but then with the velocity stack on the base it directs the air better then nothing at all. Now if you want to compare a tube with just a velocity stack to one with a filter then the one without the filter will flow better. I wouldn't be to concerned about the little amounts of material that will go through the filter.

[chrisfranklin]

I have got one of those Ebay intake jobs too.  The intake pipe is metal and actually extends, with the filter, to the radiator.  I have the factory plastic shielding below the engine pulled out so that the filter can pull air from underneath the Jeep.

But, the reality is that the metal intake tubing heats up like a Mofo.  To top that off, the intake manifold (location of IAT sensor) is right above the exhaust manifold (I know about the IAT relocation trick).  

Not really in to wasting too much time nickel and diming on the 4 banger engine for a few horsepower - any way you cut it, it's going to be a long way from a V8 (which is actually ok, cause I like the decent economy and outstanding off-roadability) ; however, if somebody else was doing the install work, I could probably see getting one of those header/exhaust manifold wraps to contain some of the exhaust heat on the 4 banger; could also see buying one of those lace-up type reflective exhaust wrap deals too.

[wrangler387]

^ i know what you mean, i'll be wraping my exhaust and intake manifold/charge piping when i get around to do my set-up.... I'm also going to be installing hood vents. There is way to much heat by the intake manifold/arm.

IAT doesnt need to move, you need to contain the heat, moving it up only makes your computer think its getting more air then it really is.

[polkcountysfinnest]

ok so as far as the heating of the intake goes it really does not thats why the pipe goes up 6 inches then straightens out it is about 25 degrees cooler than those ebay ones i have a friend that has one and i stuck his on my jeep and drove around for a little while and took the temp of the intake and then did the same with mine i ended up with the design that i got now because of the temp diff.

[YJmechanic]

you know rusty's offroad sells their intake kits for 60 bucks with kn filter