I know that if done right it can give impressive gains but what is the ideal criteria? Do you want a concealed air box, feed from where, what kind of filter elements?
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I know that if done right it can give impressive gains but what is the ideal criteria? Do you want a concealed air box, feed from where, what kind of filter elements?
Anyone?
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Theres very little gains to be had from induction kits.Quote:
Originally Posted by Dod
If you get 5% more hp you're doing well.
What you do get is better throttle response and noise.
Big gains can be obtained from fitting bigger plenums and deleting the maf and remapping to suit such as Alpha-N remap.
But i'm not sure of the gains on an M5....
I see your point but 5% is nothing to be sniffed at either though.
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There is no ideal setup-most ideal is the one it come out of the factory-its ideal for marketing men,designers,engineers.But what is ideal for yuo-your requirements you have to try and test by yourself.
But if you want more noise,get filters and air boxes.
Ok, thanks man.
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I've used K&N panel filter and induction kits in my last Jeep (2007 Nissan Pathfinder-K&N Apollo kit) and currently have a K&N open cone induction kit in my 325ci.
http://www.knfilters.co.uk/search/product.aspx?Prod=57-1002
I know there are several people who will moan and grown (I've had the debate 1,000,000 times!) about them being an oil based filter and that they don't get enough cold air. I've used them for years and have never had a problem.
If you are going to go for one make sure you get one with its own cold air feed or one (like mine) which incorporates the OEM air scoop.
Completely agree with narusa ... it's all personal preference!
Did you get yours sorted?
To be honest til now the advice was sparce to say the least but I do have an idea. I want to make a larger air box out of stainless steel or similar with a couple of cold air feeds but I need to know the best air feed position outside the car.
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I read some where before that the coldest and therefore most dense air is between 8 and 12 inches of the ground if that helps
That's true. There is a cold air feed you can get that takes a feed from the air scoop that cools your brakes beside your fog light but it does require cutting a hole in it.
Not sure how it would work with M5. It has a dual air intake as far as I remember?
You might be able to get some simple ducting from Halfords or something and secure it somewhere near the brake intake feed.
Sorry can't remember the from bumper of the M5. I know it works in the e46 M sport bumper.
http://www.beastpower.com/p/bmw/active-autowerke/AA-BE39M-FG
Ah man that look SWEEEEEEEEET!Quote:
Originally Posted by KevinF
Sorry lads, its not for an M5 just a 520i. I'm trying to help her breathe with a decent exhaust/air intake set up.
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Hi Dod, as mentioned this is a very individual choice.
I had an 1.8 E46 with Pipercross Direct Air Induction kit which was complemented by a twin 73mm Sebring exhaust and the car was running smoother and less "blocked".
At least this was my impression.
http://i1170.photobucket.com/albums/...r%20sale/2.jpg
My 318is at its beginning had a K&N induction Kit with heat blanket and Scorpiom Exhaust kit and here as well everything ran smoothly and less blocked.
http://i1170.photobucket.com/albums/...r/EE4FE690.jpg
Last not least I now have 318i estate where I opted for a Green Panel Air filter.
It will give you better performance compared to the standard one, it is washable so long life and it is just a straight swap with the normal filter. This all giving the complete OEM look when popping up the hood.
http://i1170.photobucket.com/albums/...d/B4656C25.jpg
What I can say from the different setups in 3 different cars is that:
- If you are going for Direct Air Induction go for a less restricted sport exhast as well. This way you will have more air coming in compared to the normal Filter but fumes will also get out quicker
- if going for a Direct Air Induction do go for a Heat Blanket or get it as isolated as you can from the engine heat; my E46 was without heat shield and I can assure you that in warm days with the engine warming up the car would suffer performance wise compared to winter days where it would really rev up nicely so cold air feed is vital as mentioned also by Jimmy325ci
- try to get a cold air feed from the lower part of the bumper as suggested by KevinF pointing it towards the Filter. This is what Cab of Super4 has done to his 318is to get cold air feed to his DAI K&N:
http://i1264.photobucket.com/albums/...ps0f91eed1.jpg
More pictures on it on his Thread at the bottom of page 4 (picture heavy) http://www.bmwhaus.ie/forum/showthread.php?tid=680
If a DAI kit only is installed it will make a lovely sound when aspirating more air this above more or less the 3,5k rpm range.
This sound will however be less heard and evident when installing a rear sport exhaust.
My two cents based on my personal experience ? It is not worth to install the DAI without exhast as gains will be minimal and only thing you will get is a higher aspirating noise.
Best setup would be:
OEM: Panel filter, Sport exhaust
Sport: DAI, Cold Air Feed, Heat blanket, Sport Exhaust
By Sport exhast I mean Eisenmann, Sebring, Scorpion, Supersprint etc so sporty which have Tüv approval and are legal due to CE directives which will keep you passing NCT with CO2 emissions and DB noise levels.
Hope this has been of help :smiling:
Let us know how you get on ;)
Mate that's tons of help mate and exactly what i wanted to read. So on the list is a front bumper mounted cold air feed, a large air box and decent panel filter protected from engine head (need to do homework on this) and I've been studying IP on exhaust systems and have decided I can build my own while still gaining power.
First on the list, buy a black board.
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Cheers Bob. Its not even about extracting power, just freeing up what's there and as for the air feed, I think I have it all sussed.
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Also, where can I get the bumper vents?
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