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-   -   Induction, to do or not to do (http://www.bimmerfest.com/forums/showthread.php?t=671633)

Luke1985 01-22-2013 09:41 AM

Induction, to do or not to do
 
All,

Now my motor is running top notch, I'd like to try and eek a little more out of it. I'd like to do something with induction . What are ppls feelings on induction kits/ filters etc.

I'm sure you will all say dont touch a universal kit, what about a brand name and also the oter option is replacing panel filter with a piper cross or the like.

What's going to give me a bit more grunt and some nice intake growl?

fcsteve 01-22-2013 11:53 AM

the only thing you are going to gain with a new intake is noise. it's not going to perform any better.

Luke1985 01-22-2013 12:01 PM

O.k so even for the growl, what would you recommend? I guess it also improves aesthetics under the bonnet!

I know there arent many cheap performance mods for m40

tim96 01-22-2013 12:08 PM

If your not worried about a decrease in performance get a chrome whale penis and put a big dirty poddy on the end. If you want some extra street cred you can put a 'link' ecu sticker on the whale penis, even though you probably don't have one. You will get the cool sound your after. Please keep the factory air box for a future owner who wants to swap it out or when you realize it is stupid.

In most cases you cannot beat the factory intake setup. Just put a new air filter in the factory box. I did recently and definitely noticed an increase in power, also got some induction noise at high rpm. You cannot hear the induction noise outside the car when revving up to 4000 rpm between speed bumps on the main street but that doesn't matter because I don't intend on looking like a ****** and all those school aged car sl*ts are too young for me now.

Luke1985 01-22-2013 12:15 PM

Ha hahahahaha!

Love it Tim. But calm down, I'm not 0-speed hump guy! I was just asking opinions! I will try the piper cross replacement filter I think based on your sound (albeit bit of a rant) advice.

If you take a look at my pic you'll see my car is quite original...

Thanks for your input though will not swap out the original box, any tips on making look a bit better though, ie cleaning it up? Things are looking pretty good under the bonnet as I've replaced a lot of pipes and parts recently.

tim96 01-22-2013 12:23 PM

Yeap and you got my opinion. I like doing things with a little bit of humour:D
Make it look better? I like the wet black plastic look..put some trim polish/dash polish or similar on it.

Luke1985 01-22-2013 12:25 PM

Unfortunately I think it's past that, is plastic priming then respraying with VHT black paint a good option?

BMWFatherFigure 01-22-2013 12:25 PM

Depending on how much work you want to do - gasket match the inlet and exhaust tracts; headers; larger bore exhaust; street cam; port the heads (head off for the last one). After that it gets REAL expensive. How much power do you want to spend?

Luke1985 01-22-2013 12:29 PM

I think I'd like to try and get it to around 130-140bhp, just give it a little extra. How much does cam upgrade cost? It has s/s exhaust (whole system), I think I need to get the interior finished and see what kind of money I have to play with....

I can't see cam change being less than 200......

I've got the blower motor to sort next.

Rear seats being retrimmed, need to order a dash cap or find second hand one.

Then we are looking in good shape

_Ethrty-Andy_ 01-22-2013 09:19 PM

Ive read quite a few people try and build the M40 engine on bimmersport.co.nz and only result ive ever seen is running it on mild boost. pretty much anything else you throw at it won't do anything.

My advise if you want to start chasing power is convert it to an M42 and go from there.

but none wants to hear a DOHC 4 cylinder with a big bore exhaust any more than they want to hear a SOHCer.

with that said though 130-140hp is only around 20hp more than stock so a realistic aspriation. i see in the other posts you have made that you are quite good with maintenence.

Alternatively, why not disregard all of this and throw in a shorter diff ratio? that will give you more acceleration and more perceived HP. economy may suffer a bit but its a 1.8L so pretty good already

hope this helps

Nick323 01-22-2013 11:55 PM

Enhanced efficiency
 
Seeing that you are in the UK, why not go for a K&N replacement filter and a proper tune by a Unichip dealer ?
I have gotten close to 10 Hp out of some M40 with these mods, others did not respond too well.
The Unichip tuner should not charge you anything, if there is no positive result :thumbup:
the K&N will give you a million mile warranty :)
These mods should increase performance with a decrease in fool consumption :bigpimp:

Luke1985 01-23-2013 11:49 AM

Thanks guys,

I've got a piper cross panel filter on the way and will check out the tuning . I think it's safe to say goin forward an m42 swap is going to be the way forward . This car is in excellent condition I think it warrants the expenditure.

How much would I get for my m40 lump?

_Ethrty-Andy_ 01-24-2013 12:12 AM

Quote:

Originally Posted by Luke1985 (Post 7332630)
Thanks guys,

I've got a piper cross panel filter on the way and will check out the tuning . I think it's safe to say goin forward an m42 swap is going to be the way forward . This car is in excellent condition I think it warrants the expenditure.

How much would I get for my m40 lump?

not a huge amount of UK people here, and every market is different. you can't give an M40 away in the USA, here they go for around $300 complete if they haven't got the dreaded stuck lifters that is a common problem for this engine, and around 140,000kms. That translates to roughly 100 and 90,000miles but again, every market is different so you may get more or less than that

BMWFatherFigure 01-27-2013 05:15 AM

See what Piper Cams have to say. They are well respected and don't BS IMO. Pls post result as I might send for one in my forth coming rebuild.

Luke1985 01-27-2013 07:32 AM

Will do, ill get in contact during the week, just for extra info, after fitting piper cross panel filter there actually is a difference in pick up that I didnt expect....also a nice little grunt at high revs and after quite a long drive there is cut a lot a small increase in efficiency.

_Ethrty-Andy_ 01-27-2013 09:07 PM

I dont mean to call you out, but that is probably just because the filter is a new one, ie if you replaced it with a brand new OEM one you would get the same result

Luke1985 01-28-2013 12:31 AM

Quote:

Originally Posted by _Ethrty-Andy_ (Post 7342461)
I dont mean to call you out, but that is probably just because the filter is a new one, ie if you replaced it with a brand new OEM one you would get the same result

Fair shout Andy although the oem one was only a month or so old, it's not a massive difference but I did a 200 mile journey and got slightly better economy, also this is the first time since I've had the car that its been running properly!! So I might just be seeing it at its best.

_Ethrty-Andy_ 01-28-2013 01:08 AM

what sort of economy did you get out of it by the way? manual? did you have passengers? i get around 6-7L/100km in my 316i on the open road, that converts to around 36mpg which is pretty good!

Luke1985 01-28-2013 05:55 AM

To be honest I'm getting around 30-32mpg it's a manual, that trip was just me and the wife, also I don't drive it hard....they are extremely economical vehicles for the age! There are plenty of 1800's that aren't any better now!

Chaunceton 01-28-2013 09:13 AM

I put a 3" K&N cone "cold air intake" on my 325i and it didn't make a bunch of difference. The sound is a bit better, and it maybe added 3-5 horse. It does look better and is easier to clean. Worth the money, but not a big performance booster.


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