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posted on April 29th, 2008 at 09:08 AM
Pod filters on a dual carb?
G'day.
I'm not asking for direct advice on anything, just running something by people that occurred to me while I was in Super Cheap yesterday grabbing a
new earth cable.
I was looking at their go faster bits section and started looking at the pod style air filters. Not because my van is a high performance racer, but
because I was braindead after work and also thinking about how sick I am of taking the filter box assembly in and out constantly for diagnosis.
Anyhow, it occurred to me that a couple of pod filters would almost fix my problem, but there is the idle throat to take into consideration. If I were
to make a custom adapter to put a larger pod on that side and contain both throats withing a larger sized base there is a very real chance of a flow /
vacuum imbalance between the two throats messing up running entirely.
Then I noticed that they also have oil breather pod filters with reusable elements that seem to be the same as their air filter
counterparts only much smaller.
I have to wonder if the filter is a different micron, and what the flow rate would be like.
So, besides being semi-expensive and a bit pointless, does using pod filters have any merit at all for a standard performance motor, besides clearing
a massive amount of space in the middle of the bay for other things?
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Vehicle: 1975 Special order delivery walkthrough panel based LCA pop-top camper. Motor: Nippon 1.8L Single port Wasserboxer, Transmission: 3 rib 002.
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posted on April 29th, 2008 at 09:13 AM
The space would be good.
The performance bad. IMO
Just try driving your bus without the stock air box, taking the end pieces off will show you.
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posted on April 29th, 2008 at 11:22 AM
Driving? it barely runs at all without the airbox. That's part of what led me to that line of thought. In fiddling with the motor I have to
constantly pull everything out to tweak and put it back in to start it up. really quite maddening.
Not sure what I'd use the extra space for exactly either, but there's bound to be something. Hehe.
If at first you don't succeed. Build, build again.
Vehicle: 1975 Special order delivery walkthrough panel based LCA pop-top camper. Motor: Nippon 1.8L Single port Wasserboxer, Transmission: 3 rib 002.
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posted on April 29th, 2008 at 12:17 PM
Got i wish i still had that URL, but there was a study i found with these.
You really got to be careful about which one you pick, cause there are some that have great filtering and HP performance properties while others will
let rediculous amounts of dirt in with little performance gain.
I can't remember what came first on the chart, but K&N came 2nd and was close to the top, with what was like 14hp increase on some 3ltr v6 off
some chev. (I only read it once, i can't give exacts, cept that there is a hp gain trend in poddies if you select the right brand)
And thats no kiddin on the hp gain. Mind you, it always depends on what engine you fit it too (ie: application), and what the other limiting factors
can occur. If you have the high flow pod filter, it might not make much hp difference if you have a restricted exhaust or intake (muffler, carbs,
either manifolds etc).
Its a whole system of air flow from start to finish that you will need to pay attention to to obtain the most hp gain.
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yes, be careful what u buy if u do go that way cos the noise of some can drive u round the twist
i had a K&N pod filter and extractors on my celica and the droaning roar going thro the gears was real good for headaches on trips more than 5
mins
admittadlly u do have a bit of space between u and the engine in a kombi but when i had twin 40mm webers on my bug the intake roar when going down the
highway at 110 meant u had to yell at the passenger thats only inches away
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posted on April 29th, 2008 at 08:34 PM
Hi
If you just want to get to your carbs, just leave the centre airbox in place and flip the ends off.
Steve
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posted on April 30th, 2008 at 09:04 AM
Hi,
Steve, it's also a matter of getting to the balance tube in the middle and a few other bits. But yeah, for just plain old carby adjusting I pull the
ends off the airbox.
One day I'll figure out why the manifold vacuum is so low. I replugged the brake booster lines, this time a bit more neatly. Still the same vacuum
but much better running. I think it's just due to the reduction in volume of the vacuum system causing less lag on an already struggling system. But
all that is off topic.
I completely forgot about the horrendous howl from those air filters. Thanks for reminding me! The motor may be further away but it has about 5 meters
of tin can to reverberate around in.
Pity really. I do like the concept of having the pod filters on there, but I think I'd have to fit a decent chunk of marine sound deadener to make it
earable.
If at first you don't succeed. Build, build again.
Vehicle: 1975 Special order delivery walkthrough panel based LCA pop-top camper. Motor: Nippon 1.8L Single port Wasserboxer, Transmission: 3 rib 002.
