BMC CDA induction kit

[Optimus prime]

Hi Guys,

Today I received a BMC CDA air filter. I was really excited to offer it up to the car as I had plans of mounting it behind the battery as I have seen with so many other install's of K&N cone filter and the cheap eBay imitation BMC units.

I took the standard air filter out, removed the battery to see how much room I would have and what silicone pipework I would need. Once I shoehorned the filter in it was clear that I had very little space for the MAF and the piping to the throttle body... simply put, it wasn't going to work. I was a little gutted as I was set on a short ram intake with a more direct route to the side vent.

The reason I went with the BMC was due to the carbon air box that it sits in. I wanted to avoid heat soak but get that lovely induction noise. needless to say I now have to change my plans.

Here's plan B!
I'm keen on keeping the BMC as it's a good filter. looking at the space available I could effectively replace the current air box and add new pipework to the throttle body. I would then use a bigger than standard pipe (effectively the mark iii) to connect to the existing pipework that feeds through the car body.

I would love to hear what you guys think and if anyone has any tips on what else is worth looking at.

(PS i have images but not sure how to upload them to this post... yet)

[Nvy]

Its been done and the thread is here:

https://www.mr2roc.org/forum/index.php?topic=54263.0

Scroll down a bit.

[chalced]

Put mine in place of the stock (see piccy).
Thought about trying to squeeze it behind the battery, but then you can't really see it and I think it's looks nice enough to want to have it on show!

[mikek]

That's where mine is in my 2zz

[Optimus prime]

That's a very tidy install, I love it!

I was thinking about moving the battery to the sub frame then I should have enough room to install it nearer the side vent... but after seeing your install my mind has changed! Did you vent from the factory tubing or left it open to suck in the surrounding air?

[mikek]

Flexible pipe straight from bmc to factory pipe in the rear wing

[Optimus prime]

Cheers guys!

I've ordered a 90 degree silicone bend and reducer. I'll hook those up next week and work out additional piping from there.

Thanks for your help!!!

[inside]

I have tried both configurations in this year as I've been diagnosing some issues, using same universal bmc cda (bigger one).

I've ran it as short ram intake (SRI) feeding through flexy pipe from side duct. The outlet to maf pipe needed some adjustments to accomodate it in very limited space. Fit is still very tight, its 15cm from filter to TB and I curse everytime I have to take it off (like yday .

I've also tried using it in the stock position, and feeding behind the taillight and then to stock cai pipe. Noise is much toned down, more refined, and lift transition is almost hard to hear. I've also noticed the intake temp were just a tad higher (~3-5ºC) than with SRI.

I've kept the SRI configuration, primarily because of the noise - it's really brutal in lift, and its hard to go back.

[Optimus prime]

Thanks, inside!

Really helpful info there. I have some parts coming soon so I'll start to experiment.

First of all i'll get it in place of the existing air box and work out what extra piping i will need. I'm thinking of taking a flexi hose to the stock pipework with a trumpet on the end. doing this means i will have the right materials to hand so i could later mount it behind the battery as an experiment.

I think the biggest problem i have for space is that i'm using the original MAF housing which is a fair bit longer than some of the aftermarket MAF housing I've seen. my reasoning is that i want to the keep the vanes as i've read a few reviews that removing these cause problems.

However, I do plan on doing Cap's MAF mod in a few months after changing the header.... So much to do!

[Optimus prime]

Right guys! I had a play installing the kit but I've been left a little underwhelmed with the install. The positive is that throttle response is much better and it sounds great.

I wanted to install the filter behind the battery but these is no way it will fit behind there using the stock MAF holder that I cut out from a standard air box. (image attached)

I ended up installing it in place of the stock box without additional tubing for a cool route to clean air. I went out for a few runs on this wet, cool day of about 17 degrees and when I parked up my intake temps were 55 degrees! I'm using the OBD fusion app to measure this (great app btw, well worth £10!).

I physically like where the filter is sitting as it's relatively easy to service and it looks good, but I'm not liking those temps!

My new plan is to shorten the filter to throttle body pipe work so i can get a hose connected to the intake of the air box. from there i could get a 90 deg bend and point this towards the side vent underneath the battery. To shorten the  pipework i'm going to need another MAF housing. any suggestions on what works as there is a art to MAF housings.

[shnazzle]

For that setup to work you really need to feed it directly from where the stock pipe comes behind the light.
That location is probably one of the hottest places in the engine bay. All the heat from the exhaust and cat going up and then the black heat tray points it towards that air filter.
I'm not at all surprised it gets up to 55deg. What you've got now is essentially a stock setup without the head shielding and with inferior filtering.

You'll notice that the stock box is also surrounded by heat shields at the intake, and the box itself has a heat shield. For good reason.

If yoy want to keep it there, feed it air from that stock pipe behind the light, and put heat reflective tape on as much of the pipework as you can. Or even better, devise some custom heat shields.

Behind battery is still best. But at static, my intake will reach 30-35 quite easily even there. Moving I'm between ambient and +5deg.

[Optimus prime]

yep, total agree with the physics. It was never my intention to leave it like that. The problem I have is the stock MAF holder is rather long and takes up a lot of space in comparison to some of the 3rd party MAF holders I've seen on other peoples cars. my next purchase will need to be a MAF holder. From reading other posts it's not as simple as 'just buy one and I'll work' it needs to accommodate the vanes (until i do Cap's MAF mod). all the ones I've read up about are in the US such as 'weapon R' etc. any suggestions would be awesome.

[shnazzle]

It takes a bit of chopping I agree. The CDA/BMC canister is rather large though so that's the limiting factor.
I had the stock maf adapter behind the battery at some point but the filter was smaller.
The Eliseparts maf adapter is an option. It's compact.
But it doesn't have the veins etc so you'd have to tinker with the MAF mod a bit to get the fuel trims right. I.e raise the MAF a bit more

[Call the midlife!]

Quick question, when you remove the stock airbox what do you do about the coolant pipes that clip to it? Just let them find their own place to rest or tie them up in a more standard position?


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[delhusband]

Quick question, when you remove the stock airbox what do you do about the coolant pipes that clip to it? Just let them find their own place to rest or tie them up in a more standard position?


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This is my situation now, hanging loose

[Call the midlife!]

Quick question, when you remove the stock airbox what do you do about the coolant pipes that clip to it? Just let them find their own place to rest or tie them up in a more standard position?


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This is my situation now, hanging loose

Lol. I just can't imagine the expansion pipe going straight across empty space.


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[delhusband]

Quick question, when you remove the stock airbox what do you do about the coolant pipes that clip to it? Just let them find their own place to rest or tie them up in a more standard position?


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This is my situation now, hanging loose

Lol. I just can't imagine the expansion pipe going straight across empty space.


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I'll take a pic for you, not prettiest, asked about this on my RR 

[Optimus prime]

I did cable tie mine out of the way as a temporary solution and to ensure they had some suppport. Replacing them with new piping would finish it off quite nicely.

[Call the midlife!]

It's just with the temperamental nature of the cooling system and not wanting to deviate too far from the Toyota design layout.


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[Optimus prime]

I understand what you mean about the cooling system. I had my radiator blow on me after a couple of weeks of owning the car. I fitted a new radiator and bled the system properly and the filler tank is now nailed on the max mark, it's barely moved at all! It's a pressurised system so rerouting the pipe's shouldn't have too much of an affect. it would be interesting to see what other people have done.

[Call the midlife!]

Ironically, mounting the filter behind the battery for cool air puts the MAF housing right on top of the main coolant pipe..


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[Call the midlife!]

If anyone is contemplating the CBS carbon kit it's £20 cheaper from an outfit called Kode Shop, they were actually selling it for £25 at the show today.
You can imagine my dismay as I paid £48 plus postage a fortnight ago from CBS...


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[The Other Stu]

If anyone is contemplating the CBS carbon kit it's £20 cheaper from an outfit called Kode Shop, they were actually selling it for £25 at the show today.
You can imagine my dismay as I paid £48 plus postage a fortnight ago from CBS...


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Your face was a picture 

Came with all the attachments and everything.

[Call the midlife!]

If anyone is contemplating the CBS carbon kit it's £20 cheaper from an outfit called Kode Shop, they were actually selling it for £25 at the show today.
You can imagine my dismay as I paid £48 plus postage a fortnight ago from CBS...


Sent from my iPhone using Tapatalk

Your face was a picture 

Came with all the attachments and everything.

Exact, same kit! I almost did what the seller said and bought one to return to CBS for a refund but I'm too straight to do it!


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[Optimus prime]

Hi Guys,

I thought I would give you a quick update.

I've resorted back to the stock box, cleaned the MAF with contact cleaner for good measure. Sprayed the intake system with EGR cleaner, replaced the stock air filter with a new Mann filter and swapped out the intake restrictive pipe with a 80mm length of neoprene ducting from eBay:

https://www.ebay.co.uk/itm/Flexible-Air-Ducting-Hot-Cold-Transfer-Brake-Feed-Intake-Pipe-Hose/330853002941?ssPageName=STRK%3AMEBIDX%3AIT&var=540129844029&_trksid=p2057872.m2749.l2649

Lovely bit of intake servicing and i'm happy with the results. A bit more throttle response and it feels slightly faster. for such a cheap mod its definitely worth a shot for those with a stock intake.