So i went in to see my mechanic today to ask about getting a MAF adapter for the pod i want to fit on my car. Have someone bringing one up from south africa hopefully next week but i wanted to see if it'd be easier getting one made up. Having been on the forum a while i know a lot of guys have pods and things like the Selin kits are great for those wanting 500+HP which is no where near what i want. I'm planning to keep the car as stock as possible but jus up the power a little, pod & turbo back 2.5" exh and boost up to 12psi. My question, with this in mind, is there really any difference/point in a single pod and a dual pod like this . Versus the stock airbox, my mechanic seems to think the single pod is pretty much the same as the stock airbox in terms of performance.
Get a single pod. The only reason one of those split-pod systems is useful is because it clears a FMIC. The single MAF is the restriction point.
What Anti said. That particular style of 'Dual Pod' Intake is still just as useful as a Single Pod in terms of performance as they both still merge into the same pipe anyhow. Where a true Dual Intake will not merge, for example the Selin Intake Kit. As for Stock Box vs Pod, I'm personally still undecided. Theres arguments for both sides and either way, switching to one or the other will not give a 'night to day' change in performance. MoulaZX
If you are not wishing to produce horse power beyond the MAF's capability, dual intake (doolz, Selin) will offer little more then a larger surface area and LESS filtration with a small gain in performance. (The one you pictured has been explained by Anti) The simple fact is nothing performs better then the factory paper filter in the 3 sides of the triangle view, filtration/service life/cost, the primary job of the filter is to protect your engine. The performance benefit of a pod filter comes from less restriction. (read less filtration). So when someone goes from clogged paper filter to fresh less restrictive pod, is holy carp that was worth it, done it myself. You could of got the same if not a better effect by just pulling your stock air filter panels out. (Not recommended for anything other then round the block.) I also think part of the pod benefit is the increase in intake noise, a bit like that sporty feeling when a 4 cylinder shit box has a hole in the exhaust, sounds fast so it must be. So if maximum protection of your engine is most important, just replace your factory air filter. If a few HP and better induction noise are more important put on a pod. There is a middle ground you could fit K&N panel filters to your stock air box. They are less restrictive then the OEM paper filters but being in the factory air-box has advantages. http://www.knfilters.com/search/product.aspx?Prod=33-2036 The induction tubes pre filter help heavy stuff fall out of air before the filter, where as a pod is being force fed shit blowing down the road, if you live in an area near a beach where sand blows around on the road (anywhere for that matter), you WILL be getting significantly more in the engine with a pod then the stock air-box. Engines don't like sand, although an extreme example a recent fresh rebuild lasted about a minute after its first start due to sand left over from sandblasting in the intake plenum. In this link you will find a link to some actual tests, although both the NAPA (aftermarket) and the Mazda OEM are paper filters, the Mazda appears to work slightly better. http://www.bobisth***lguy.com/airfilter/airtest1.htm FFS link wont work due to a ban on "E O I" text or something ! Meant to be BOBISTHE OILGUY Also in Australia you can "defected" with possible fines and detailed transport department inspections etc that can leave your car off the road. They are not easing up, year buy year they keep coming harder. I have had a good hard long look at air filtration to the point of going back to the stock air-box and accepting the limitation of the single MAF on a high dollar build that could use the second one.
Retarded, isn't it. Apparently the filter is for the greater good, but all I see coming from it is a Pain in the ass!
Ummmm Few things not sure others mentioned. 1) I don't believe a K&N (or other brand) filter is any less "filtery" just because there isn't as much "paper" on it, or as big a filter. Filters all have a standard design so unless they're selling something that has holes in it like swiss cheese, 99% of filters will be more then enough to filter out dust/particles/what ever it is that filters filter out most. Unless your doing dakar every other week ??? 2) I thought the most benefit from swaping from the box to the pod was getting rid of any extra piping that leads up to the box. That is you shove the pod right at the point where the intake pipes join, so there's a little less pipe for air to travel through. So while not a night and day change, since you are regularly cleaning or changing your stock air filter, why not spend the extra few bucks and get a pod instead and get rid of that little extra bit of plumbing. That was my logic behind my pod anyway. As for dual, I would have thought the dual set up is a secondary need. That is, once you get to a point where your engine is sucking in air like it's going out of fashin, you setup dual's so that a) there are two lots of same surface area sucking in air compared to a single, ie each side gets it's own source, rather then sharring b) plumbing is single, not dual so it only got the one direction. or c) you like the look of it, have the cash to spend on it
Duals can be for looks but primarily for exceeding the 500HP approx limitation of a single MAF. Filter surface area has a small part to play, Nissan would of calculated CFM at 7000 RPM at stock boost. Too small would be like trying to breath through a straw, at a point larger wouldn't make a difference. A larger surface area would also give a longer service interval and less restriction for the same filtration. In the context of a 500RWHP build the less restriction from more surface area is useful. A single pod will have bugger all more surface area then 2 x stock panels so with panel filters of a similar material to the pod IMHO there will be 5/8th of FA diiffernce. IMHO to get excellent filtration and high performance flow, it cant be done with one filter medium.
Thanks guys, esp the cross section info from brisz. I think that alone cancels out the restrictive argument. Theoretically would it be correct to say one could stick with the stock airbox(perhaps with KN flat panel or similar better flowing filter) till they were goin over the 500HP? And it totally makes sense of the filtration vs flow argument. Which would explain HP gains. Other thing my mechanic brought up which i've jus remembered is the implosion of pod. I would imagine a crazy chain of events would have to happen to get debris big enough to smash through (after ricocheting amazingly) into the (extremely poorly made) pod. I can't imagine intake vacuum being that crazy lol
