Only buy one if you just can't stand having a stock looking engine. Because it sure won't help performance or mpg. Not in the least. Really.
I would just go for a good quality air filter like AC-Delco (normally ranks first in filter tests), Wix, Purolator, etc. which are not restrictive thus your engine will run as well with them as with any so-called "free flowing" air filter which for the TJ is really a misnomer.
__________________ When you have a choice, buy American.
That's not true. Can you drink as much from a coffee stirrer as you can a regular straw? Larger diameter tube as well as a composit material make a larger denser charge of air. I went with the volant cold air kit with dry filter. Making my daily rounds stock I filled up at 17.5 gallons used and 290 miles. After the intake same trip I fill at 17.5 gallons used but now have run 340 miles as well as much better throttle responce. I'm pretty sure companies like banks, volant, airiad don't spend tons of money on design composition of components and testing for a product that does nothing. To capitalize on a better intake a more free flowing exhaust will help more.
Doesn't matter how big the tube is. If you can draw all the air you need or can use through a 2" tube, how is a 3" tube going to help?
Those companies also spend tons of money on marketing to find suckers to send them money. But just to play your game. Do you think Jeep spent tons of money to come up with the NON RESTRICTIVE air box on the Jeep. When a simple tube would make it get better MPG and HP? A tube that would be cheaper to make, require less design work and work on almost any model. What would be there reason for not installing this? To hold down the HP and MPG?
They dont do it because they accomplish nothing. Do a search and you will find a guy who did 18 dyno pulls with his jeep and the aftermarket intake added no usefull HP.
Looked at information on this several times and I agree... The auto company has more to gain by giving you a more efficient engine... For example... My gf has a ford focus, they added almost 30hp by redesigning the same engine... Plus greater fuel economy... This is a major selling point... Plus that dyno pull thing shows no statistical difference... Unless you fill your tires to 50 psi... That is proven to add hp at the wheels not just the crank... Haha
Scoob the one thing that's missing from the argument is something that's the same on all auto makers. The stock intake is designed to be restrictive so as not to make noise in the cabin and to hold the engine at legal limits for emissions. Granted the jeep one isn't to bad but increased throttle responce was enough for me to buy one. On a nj hwy the difference between hitting 65 and 85mph could be your life lol. And don't listen to the companies that make the intake. Go with simple media. Car forums, magazines. Project car was a good one when I worked on some imports. Pure grass roots or rice paddy roots. Plus to make an air pump like an engine run better you need better output as well. Which means better exhaust.
I bought mine off eBay a few years ago. It looks similar to the last one and it was a eBay intake company only. It was made by INSYS-USA. It was only $40, and cant complain. Has held up good. I always check the tube for signs of dirt and its clean as a whistle.
That's not true. Can you drink as much from a coffee stirrer as you can a regular straw? Larger diameter tube as well as a composit material make a larger denser charge of air.
Look at the OE air intake diameter, it's diameter is more than capable of easily flowing more air than the engine can consume at WOT (wide open throttle) and redline rpms.
And something too many people forget... the throttle body's butterfly valve inlet is the restriction for the engine's air intake at all rpms but WOT... not the air intake tube. The engine will only get as much air as the valve is allowing and in NO way is that air being restricted by the OE air intake system.
In SOME vehicles, yes the OE air intake system is restrictive but the TJ's was specifically (!) designed to be completely non-restrictive.
So install your CAIs etc. on your Mustang HP 5.0L and Camaro Z-28 engines to improve power but doing so on the TJ won't help a thing... except add to the profits of the CAI manufacturer.
__________________ When you have a choice, buy American.
I don't disagree with ya jerry. I was talking about the industry on a whole. I understand jeep is as true grit basic American product. I picked up a few mpg with my setup and throttle responce which is what I needed. I had a gift card so I didn't care about the price. But say for your caddy the intake is restricted to make a quiet ride and meet the man's specs. I used to work for gm and owned quite a few track cars. Different engines respond differently to setups. I love my jeep because it is a basic beast.
Are you saying that an intake has any effect on noise heard in the cab?
yup. most sound like a hoover vacuum sitting next to you, running full blast. as a bonus, some have an annoying high pitched whistle around 2000 rpms.
thats of course in addition to the large aluminum intake tube that acts like a heatsink and open air filter sucking dirty hot air from the middle of the engine compartment, which all act to increase air intake temps.
Well a guy down the road is a Amsoil dealer...I emailed him and he's ordering a Amsoil dryflow filter for me for $46. I think in the long run it'll be cheaper and work just as good.
Thanks for the comments.
Now to get the flippin exhaust manifold replaced!
Jasper: 1998 Wrangler Sahara pkg. 4.0, 6" lift, 35's and more.
GO BIG BLUE!