yes, PCVs are routed after the MAF on an EFI motor, but the blowby/oil causes valve deposits, and generally just coats the interior of the plenum, runners, ports, throttle, and vlaves with coke. the K&N vs paper filter isn't a debate for me. there's absolutely nothing wrong with a Hengst/Mann filter for your daily driver. and there also nothing wrong with a K&N either. i feel like syn vs dino is a matter of new school and old school. some people are so dead set on the factory recomendations, while overlooking useful modern technology.
mbcoupes member tested the K&N on dyno, resulted in a loss of 5 hp. Anyway, i beleive paper to filter better anyway, and i'd rather not get my hands dirty with the damn oil.
BTW. My K&N is for sale, used and dirty, but good condition otherwise (lifetime warranty?) $25 + shipping. get your own oil. PM me.
This is the first time I ever saw anybody trying to sell a used K&N filter.
And I take an exception to the statement that K&N filters filter just as good as paper filters. I saw plenty of evidence that disputes that.
a loss of 5hp? peak hp means nothing to me. where's the dyno sheet? i bet there were gains of 5hp all throughout the powerband and probably a boost in torque too. when it comes down to it, if you just replace your factory filter with a K&N that is the same exact dimensions, your not changing a whole lot aside from the filtration material. i don't care what anybody says, but i think the factory airbox is pretty damn restrictive. ditching it and using a K&N with a positive source of ambient air will give you a noticeable kick in the pants. and if you don't like K&N filters, then don't use them. just don't spew myths about what you've heard and base your opinion on other peoples BS they pulled outta thier arse without a valid study to back it up. many people have been using K&N filters for decades with no issues. (aside from EFI MAF contamination) when used with carbs, CIS, or MAP you can have a reliable, effective filter that will last for years.
So without the filter, did you notice any increase in HP?
not really anything major, but i DID notice a faster throttle response time, and it seemed like it was pulling slightly more... i think it might have been the placebo effect though.
but yea, the throttle response and nice engine growl weren't my imagination ;]
not really anything major, but i DID notice a faster throttle response time, and it seemed like it was pulling slightly more... i think it might have been the placebo effect though.
but yea, the throttle response and nice engine growl weren't my imagination ;]
So obviously the K&N filter is not going to increase the HP.
a loss of 5hp? peak hp means nothing to me. where's the dyno sheet? i bet there were gains of 5hp all throughout the powerband and probably a boost in torque too. when it comes down to it, if you just replace your factory filter with a K&N that is the same exact dimensions, your not changing a whole lot aside from the filtration material.
just don't spew myths about what you've heard and base your opinion on other peoples BS they pulled outta thier arse without a valid study to back it up
I'm not 'spewing myths'. it wasn't a CONTROLLED study, but it was back to back filter test between the two filters. K&N on, OEM on. you can find the dyno charts yourself in the mbcoupes archives. the difference between 2 filters IS ALL ABOUT the material versus the amount of surface area. OEM has a LOT more surface area and has a better gasket. the HP/TQ changes varied at different RPMs, however there was no significant advantage with either, at a 5 hp loss at peak.
Based on the quality of MY K&N i would say any gain in airflow is probably from the gaps between gasket and the airbox from careless installation (the filter is stiff and the gasket is even stiffer, hard to align properly against the lid). The only time the K&N would have an advantage is that it can be cleaned frequently at no significant cost, versus the paper, which needs to be changed out. I would guess the K&N companies own tests are clean freshly oiled K&Ns versus dirty clogged paper filters.
Anyway Nurspec, you can take your bad attitude and stuff it up your dirty #(&$*.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Linear Mode
