Twin Airfilter
Discussion
The 'y' and twin filters is what Rob was suggesting we do with mine, as he suspected we weren't getting enough air into the engine via the standard set up, this was when she was producing 355 bhp at the fly.. We've gone a different route with an enlarged air box on the ACT triple plenum which has allowed a larger diameter 'motorsport' grade induction hose to be fitted from the airbox down to the filter, plus a larger (higher flow) filter which has also been repositioned away from the radiator and in the direct air flow (the cut out under the indicator). This also does away with the bend in the hose in the nose so it's now almost a straight run from the filter into the airbox, and gets some 'ram air' effect when on the move 
I'm tempted to get it RR'd before fitting Clive's Y piece to see if the induction mod on its own has made any difference... having said that its also been remapped since the last RR so would be difficult to know if any difference was down to mods, remap, or a combination of both...
Be interesting to make up a short hose and filter coming straight out of the plenum/air box that was an easy swap for the standard hose and filter so it could be swapped during the RR session... maybe you could do that with the Y piece?
Chilli
I'm tempted to get it RR'd before fitting Clive's Y piece to see if the induction mod on its own has made any difference... having said that its also been remapped since the last RR so would be difficult to know if any difference was down to mods, remap, or a combination of both...
Be interesting to make up a short hose and filter coming straight out of the plenum/air box that was an easy swap for the standard hose and filter so it could be swapped during the RR session... maybe you could do that with the Y piece?
Chilli
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king hell Chilli how fast you aiming on going, you could easy make air pipe from old one, I like that ram air idea does your filter draw through it's centre! So straight up there, at the end of the day if there is some air pressure at the throttle valve your laughing! Does the filter restrict it much, at 130 it must be like turbo air! Is this the answer to my prays, or is it far more complicated than that? I think it is, Im thinking like 4 big bore pipes in my nose feeding into one? Ram air alright!!! Could you re map it and would there be far to much cold air.
king hell Chilli how fast you aiming on going, you could easy make air pipe from old one, I like that ram air idea does your filter draw through it's centre! So straight up there, at the end of the day if there is some air pressure at the throttle valve your laughing! Does the filter restrict it much, at 130 it must be like turbo air! Is this the answer to my prays, or is it far more complicated than that? I think it is, Im thinking like 4 big bore pipes in my nose feeding into one? Ram air alright!!! Could you re map it and would there be far to much cold air. Got the car out today after 4 months of lay up ,started second time ,apart from the rattly passenger door, everything else went well .
It`s a bloody animal ,had to be carefull .
Just fitted the twin air filters ..seemed to be more responsive . Hope i don`t get any over heating problems beacause they are in front of the radiator. I even fabricated a little bracket to hold it in situ.
It`s a bloody animal ,had to be carefull .
Just fitted the twin air filters ..seemed to be more responsive . Hope i don`t get any over heating problems beacause they are in front of the radiator. I even fabricated a little bracket to hold it in situ.
Edited by SILICONEKID350HP on Sunday 10th March 21:18
Looking good Daz, but wont they get wet there when your out in the rain??
Can anyone explain the physics of this (in laymans terms of course!!) to confirm it works? How does it give more airflow when the two inlets suck into one pipe of the same diameter? Of course I am not saying it doesnt work but would be interested in the views of those that know!!
Can anyone explain the physics of this (in laymans terms of course!!) to confirm it works? How does it give more airflow when the two inlets suck into one pipe of the same diameter? Of course I am not saying it doesnt work but would be interested in the views of those that know!!
roseytvr said:
Looking good Daz, but wont they get wet there when your out in the rain??
Can anyone explain the physics of this (in laymans terms of course!!) to confirm it works? How does it give more airflow when the two inlets suck into one pipe of the same diameter? Of course I am not saying it doesnt work but would be interested in the views of those that know!!
If i get a problem with the rain i can eather spin them upright or even push them towards the radiator .wanted to keep them away from the radiator .Can anyone explain the physics of this (in laymans terms of course!!) to confirm it works? How does it give more airflow when the two inlets suck into one pipe of the same diameter? Of course I am not saying it doesnt work but would be interested in the views of those that know!!
To be honest i have never seen any water in that area.
Just thought it may get a bit more air in to the engine ..
LS engines use two air filters
Edited by SILICONEKID350HP on Sunday 10th March 21:46
It works on the assumption/basis that the inlet 'pipe' is large enough to flow more than enough air for the engines needs, lets say (just for example) your engine needs 500 cubic feet a minute at maximum rpm (say 5500 is max rpm). So, with no filter, the engine is getting all the air it needs. Now stick a filter on that's too small (not enough surface area) or is too dense (doesn't let air through easily) and your engine vacuum might only be able to pull 400 cubic feet a minute through it, which won't be enough to allow it to reach 5500 rpm, i.e. it runs out of puff at say 5000 rpm. Now, put a branch on the pipe with another filter on it and the vacuum has a second source of air it can 'suck' into the pipe....bit like sucking juice through two straws instead of one, even though you haven't increased the size of your throat...
Chilliman said:
It works on the assumption/basis that the inlet 'pipe' is large enough to flow more than enough air for the engines needs, lets say (just for example) your engine needs 500 cubic feet a minute at maximum rpm (say 5500 is max rpm). So, with no filter, the engine is getting all the air it needs. Now stick a filter on that's too small (not enough surface area) or is too dense (doesn't let air through easily) and your engine vacuum might only be able to pull 400 cubic feet a minute through it, which won't be enough to allow it to reach 5500 rpm, i.e. it runs out of puff at say 5000 rpm. Now, put a branch on the pipe with another filter on it and the vacuum has a second source of air it can 'suck' into the pipe....bit like sucking juice through two straws instead of one, even though you haven't increased the size of your throat...
Nice way of putting it
I had to cut the two braches down by 20mm and i cut a bit from the length . Its difficult to tell if it has made a difference because it`s been a while since i last drove that car ..
Throttle response just feels that bit quicker. Hoping to get the ground problems sorted and get it tweaked .Just need a specialist to actually wants to touch it .
Next job Battery the boot then oil cooler !
Throttle response just feels that bit quicker. Hoping to get the ground problems sorted and get it tweaked .Just need a specialist to actually wants to touch it .
Next job Battery the boot then oil cooler !
Edited by SILICONEKID350HP on Sunday 10th March 22:33
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