Who has one of them fitted and are they better than single cones? Want to swap mine but not sure about which one to go for.

 

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Z first and anything else is secondary!

John Newcomb (NukeEm)

www.geocities.com/jn300zxtt

only worth swapping if your going to have one on each side ie put the mas on one side and dummy the otherside and remap ecu. If not probably not worth running two filters into the same mas, you wont see a gain like that.

 

Yes thats what I thought would be best but who makes the best kit? I have seen a number of them, one which is like a U shape with a single MAS and the two filters facing down but this seems to create a vortex in the u-bend. Another was an inverted Y shape again one MAS but who makes one that has the dummy pipe arrangement?

im sure JWT does the duel one.

HKS make a duel one aswell but i think its very pricey.

 

and yes whats the point or making a bottle neck like that for two filters into one mas, when one filter runs straight and direct, plus the MAS is the limiting factor for horsepower anywas. i thik it works out to around a restriction of 5.117 volts= 478 bhp on 94 us octane fuel.

 

I have the JWT duel pop (no T-piece, one pop per side), upgraded from the single pop. Works great. If you buy it, make sure you get the driveability upgrade (which makes the car drive nicely at slow speeds), also make sure you get the metal thread (not plastic) that goes into the stock re-circ valves.

 

Obviously you will need to get a new jwt chip at the same time or buy an Apexi AFC which can deal with the Air flow meter(s). If you are getting bigger injectors remember to order the chip for the injectors with dual pop or not.. depending on which way you go.

 

Jez.

 

[This message has been edited by Jez (edited 17-09-2002).]

John, you will remember to tell your insurers - wont you ;-)

Of course that will be the first phone call I make after getting the kit fitted!

 

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Z first and anything else is secondary!

John Newcomb (NukeEm)

www.geocities.com/jn300zxtt

you should make the call before you get it fitted to upgrade your premium.

 

it will probably only be £20 and is worth it, if you are in an accident and say you get taken to hospital and your car gets taken off for inspection, if you havnt notified the insurance company they will not pay out.

I told them I had fitted an after market air induction kit and they didnt ask whether it was single or twin.

 

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Z first and anything else is secondary!

John Newcomb (NukeEm)

www.geocities.com/jn300zxtt

I've got the dual one from SE. I think Smithy makes a nice one?

 

Grant

But the SE Unit is with the T unit still in place Grant, u still have a restriction, go for what Jez has John, allows much more airflow.

SE make their own 'T' piece, with two large filters on it. The real restriction is in the AFM in all (replacement) cases.

SE have a new dual filter version they are making up in an X shape and this is what I am going for.

 

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Z first and anything else is secondary!

John (Nukem) Newcomb

www.geocities.com/jn300zxtt

But the AFM is the restriction NOT the filters - once you have an aftermarket filter that is

 

CheerZ,

 

Andy

It is seemingly only a restriction if the ECU takes the information at face value. If it is programmed to treat the value as only half of the true air input then it is not an issue. So SE and JWT both say when I spoke to them about this by phone.

True in terms of the range of voltage that it produces, but I was actually reffering to the cross sectional area of the pipe.

Which pipe? The internal diameter of the sensor? Only one of the filters uses the sensro so lots more pipe width for air to go through in the X design.

 

[This message has been edited by jvnewcomb1961 (edited 30-09-2002).]

Personally John I would go for the Stillen or the JWT dual pop design, as this has been proven and tested for the last few years.

Who will reprogram your chip for the dual pop?

Maybe we have got our wires crossed??? So this x design is using a seperate filter for each bank??? This is what I was reffering to. If you have 2 filters both joining (in whatever fashion) then going through the MAS then there will be no noticable improvement...

 

CheerZ,

 

Andy

Originally posted by jvnewcomb1961:

Which pipe? The internal diameter of the sensor? Only one of the filters uses the sensro so lots more pipe width for air to go through in the X design.

 

[This message has been edited by jvnewcomb1961 (edited 30-09-2002).]

 

Yes, so if I understand you correctly you will have effectively doubled the volume of air that can be flowed and so solved the problem.

 

Yes. If you look at the car with no filter or pipework left on it, there are to appertures top left and top right to each side of the engine. What SE ahve design for me is an X system where a pipe goes from top left to bottom right and has the AFM on it and a filter. The apperture on the top right goes down to ther bottom left and has a filter on it. Then across the top a pipe goes between top left and top right to act as a balance pipe. The ECU chip is progarmmed to expect that the voltage from the AFm is only representative of 50% of the total air being drawn in through the new system and therefore the normal disadvantages of a dual filter system are avoided. When Peter drew his idea for me I was very impressed. I just hope that it works as well as he draws!

 

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Z first and anything else is secondary!

John (Nukem) Newcomb

www.geocities.com/jn300zxtt

Marc - by the sound of what John has described, the SE solution is more or less the same as the JWT dual pop solution - except in the design of the pipework (JWT's doesn't criss cross like that, but does have a balance pipe if you fit the 'driveability mod' that's recommended)

 

Not knocking SE there at all - after all there are only so many ways to skin a cat And it does sound like it should be a little more compact (or at least easier to cram in the space available) than the JWT solution.

*And* you don't have to send your chip 5000 miles to get it reprogrammed... Always handy..

 

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GZ.

I obviously did not describe it well enough for you to understand. The X system that SE have designed has two seperate pipes, one for each filter and only one pipe feeds the AFM so it will make a difference. It is nothing like the JWT or pervious SE filter systems at all. Bored explaining myself now.

John, I know exactly what you are describing, and if I recall, JWT (or was it Stillen, certainly a US manufacturer/reseller) have a system that is very similar - two filters, two entirely seperate pipes, and the AFM is only on one half of the system.

 

That's what I was referring to.

 

[This message has been edited by greyzed (edited 01-10-2002).]

JWT's (available via Stillen) offering uses two L shaped pipes and no balance bar. It is similar in that it supports the AFM on only one intake pipe but is not the same at all. That is why I feel that the X design from SE is the best for my car and will provide a noticeable benefit over a single intake, whatever duff says to the contrary. Still bored of this.

Actually I wasn't arguing the relative merits of either system, you pick what you like and run with it, that's fine.

 

I was merely pointing out the similarities in the systems. AFAIK the 'driveability mod' for the Stillen system is effectively a balance tube between the two sides.

 

Anyway, as you're bored of talking down to people, I don't expect a reply..