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Air Filter change
Hi all!
I am looking at the air filter and its looking a little dirty. Not crazy but some dirt for sure. I cant say for sure when the last time it was changed. I figure they cant be that expensive so I am just going to get a new one rather than try and clean the old one out. What brands would be best and from what site? I have seen a couple on ebay by Purolater and or course the WIX one. Purolater on the ebay seems cheapest though. There is also a K&N but they seem super expensive. Do i need these?? Tyrig to save some pennies for christmas so any info that would help i would greatly appreciate! Chris |
Purolator, Wix, Delco, Mann, Beck Arnley....any of those usual brands should be fine
Wix filter and NAPA are usually the same, just a different package....so your local NAPA auto parts should be able to fix you up. Take the WIX number, drop the fist digit, and there's your NAPA number ! Cheers DD |
Originally Posted by Doug
(Post 1991487)
Purolator, Wix, Delco, Mann, Beck Arnley....any of those usual brands should be fine
Wix filter and NAPA are usually the same, just a different package....so your local NAPA auto parts should be able to fix you up. Take the WIX number, drop the fist digit, and there's your NAPA number ! Cheers DD great! I have a napa near by so will trek over tomorrow. On a slight tangent. Why is the K&N so expensive???? |
Originally Posted by chrisleg
(Post 1991490)
On a slight tangent. Why is the K&N so expensive???? Cheers DD |
I just saw a testing of air filters in youtube using a dyno. The K&N filter increased horsepower and torque significantly over the stock air filters. In fact the stock air filters turn out to be restrictive.
Second to the K&N in performance was CarQuest's Premium air filter. my conclusion is: don't waste the money on a stock air filter. https://youtu.be/GS69owXpGdY |
Originally Posted by Jose
(Post 1991557)
I just saw a testing of air filters in youtube using a dyno. The K&N filter increased horsepower and torque significantly over the stock air filters. In fact the stock air filters turn out to be restrictive.
Second to the K&N in performance was CarQuest's Premium air filter. my conclusion is: don't waste the money on a stock air filter. https://youtu.be/GS69owXpGdY Right, an improvement of 2%-3%.....which I describe as a 'slight difference' and you describe as 'significant' . It's all in the eye of the beholder, I reckon :) Cheers DD |
if you add fat tires to the 2-3% of the K&N air filter, you get a total 5-6% improvement.
With these heavy cars, even a 1% improvement is satisfying. If you delete the cats, that's another 1-2% improvement, so every slight difference adds up. |
Originally Posted by Jose
(Post 1991634)
if you add fat tires to the 2-3% of the K&N air filter, you get a total 5-6% improvement.
With these heavy cars, even a 1% improvement is satisfying. If you delete the cats, that's another 1-2% improvement, so every slight difference adds up. interesting. I was reading up on the k&n and what pipped my interest was the fact that it can be cleaned. We get a lot of dust and pollen here and if it can save me some $ down the road then even better. is there any ssues with size and fitting? I read somewhere that it was a slightly tighter fit than stock? |
Originally Posted by Jose
(Post 1991634)
if you add fat tires to the 2-3% of the K&N air filter, you get a total 5-6% improvement.
With these heavy cars, even a 1% improvement is satisfying. If you delete the cats, that's another 1-2% improvement, so every slight difference adds up. If you can actually feel a 1% improvement your senses are much more finely honed than mine :) Not sure how fat tires add horsepower. You'll have to explain that one to me ! Cheers DD |
Another detailed post gone....
Bottom line effort. Dust, blow or vacuum it off. Spend the pennies on Christmas... |
Chris, the K&N air filter costs more because it is a better filter. It is also forever, you never have to replace it again. It comes with a tube of sealing oil and a sticker for the filter canister warning any mechanic to not replace it.
If I remember correctly, the part number is 2871 but don't hold me to that. I did not have any fitting issues, but it is a more hefty filter than any other paper filter. go to www.k&n.com and search for the 4.2 liter jaguar air filter. |
Originally Posted by JagCad
(Post 1991666)
Another detailed post gone....
Bottom line effort. Dust, blow or vacuum it off. Spend the pennies on Christmas... The notion that a particular aftermarket brand of cleanable filter is in any measurable or effective way superior...well, it defies logic because if better filtration consistent with adequate air flow requirements were obtainable, do you not think that even ONE automobile manufacturer would use such a system as OEM? Air filters certainly can and do vary in quality (just as oil filters do)...but the premium brands and the OEM suppliers' products are not only affordable, they also have been proven to work well...if they were in any way detrimental to the performance or longevity of the engines, they would not be specified. And when we have spent an excessive amount of money for an "improvement" our brains tell us what we so desperately want to hear - that the money has not been wasted. Thus the "1% improvement". |
Doug, around 1992, Road & Track magazine did a study on fat tires versus stock thinner tires. They used sport cars and everyday land yatchs, changing their tires with fat ones after testing the cars with their factory reccomended tires.
the conclusion was that the more rubber on the pavement the faster the acceleration from zero. Braking and cornering was also improved with fat tires. After that, I went and installed P235-60-15 Dunlops in my '84 XJ and indeed the acceleration from zero was improved, not to mention the cornering, the car sticks to curves at high speeds without much effort, and it also assumed a lower stance which helps in cornering. |
Originally Posted by Jose
(Post 1991700)
Chris, the K&N air filter costs more because it is a better filter. It is also forever, you never have to replace it again. It comes with a tube of sealing oil and a sticker for the filter canister warning any mechanic to not replace it.
If I remember correctly, the part number is 2871 but don't hold me to that. I did not have any fitting issues, but it is a more hefty filter than any other paper filter. go to www.k&n.com and search for the 4.2 liter jaguar air filter. Did some searching and found ??? |
Chris, that's the one. p/n 2350. That price is great, I have seen them for $72.00 + Shipping. (I have no clue why p/n 2871 came to mind, maybe that number is the one for my Ford minivan which has one too).
will your XJ take off like a Lamborghini? NYET !. but you'll get a little better gas mileage and a little better acceleration from a stop. |
Originally Posted by Jose
(Post 1991706)
Doug, around 1992, Road & Track magazine did a study on fat tires versus stock thinner tires. They used sport cars and everyday land yatchs, changing their tires with fat ones after testing the cars with their factory reccomended tires.
the conclusion was that the more rubber on the pavement the faster the acceleration from zero. Braking and cornering was also improved with fat tires. That's pretty vague. All fatter tires? Or just some? Are all fatter tires better than any skinnier tire? After that, I went and installed P235-60-15 Dunlops in my '84 XJ and indeed the acceleration from zero was improved, What's the explanation for this? How was it measured? Why would a wider tire improve acceleration? (Unless, of course, you're burning rubber....which hurts acceleration) not to mention the cornering, the car sticks to curves at high speeds without much effort, and it also assumed a lower stance which helps in cornering. If you're breaking traction on acceleration (in a Series III XJ6? Not likely) then you're hurting acceleration. Better traction from fatter tires would then help, obviously. Earlier I thought you were saying that the fatter tires increase horsepower....which isn't true, obviously. Cheers DD |
Originally Posted by Jose
(Post 1991749)
Chris, that's the one. p/n 2350. That price is great, I have seen them for $72.00 + Shipping. (I have no clue why p/n 2871 came to mind, maybe that number is the one for my Ford minivan which has one too).
will your XJ take off like a Lamborghini? NYET !. but you'll get a little better gas mileage and a little better acceleration from a stop. :) |
I have been using K&N filters in all of my vehicles since I started driving, back in 1992.
Especially on good old carburator engines, a well tuned carb in combination with a K&N filter can improve the performance dramatically. My 2007 V-Max does best on K&N's. For my SIII V12, I first bought stock filters, but will be swapping them for K&N once they are due... |
K&N air filters allow more air into the combustion, that is how I understand it, in my fuel injected XJ it took a few drives for the system or ECU to re-calibrate itself ( ? ) to the change of more incoming air. Whether that resulted in increased engine performance or "breathing", I don't know, but it made a believer of me.
I CAN say that it is the one modification that resulted in more perceived power. so I may be imagining Chariots in the sky? In that case, bring me MORE Chariots like the K&N Air filter ! Not to mention it is an item I will never have to worry again. By the way, I am trying to convince K&N to manufacture air filters for the 1963-1968 3.8 liter S type. They are open-minded, young blood over at K&N. Anything that will make 'em more dinero baby! |
Originally Posted by Jose
(Post 1995230)
K&N air filters allow more air into the combustion, that is how I understand it, in my fuel injected XJ it took a few drives for the system or ECU to re-calibrate itself ( ? ) to the change of more incoming air. Whether that resulted in increased engine performance or "breathing", I don't know,
but it made a believer of me. I CAN say that it is the one modification that resulted in more perceived power. so I may be imagining Chariots in the sky? In that case, bring me MORE Chariots like the K&N Air filter ! Not to mention it is an item I will never have to worry again. So much depends on individual circumstances. In my driving environment an air filter lasts for years so the expense of replacement really isn't a concern. If I was driving down dirty, dusty roads every day it might be a different story. But, then again, if that was the case, I might be more concerned about maximum filtering ability and less concerned about more power or saving money. Cheers DD |
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