View Full Version : what type of air filter can I use with My setup??
I've got a bottom mount Gt 4094r and have very little room to fit a air filter, I wanted some advice on what I can do. I do have my ac compressor im not willing to take out and I dont want to go smaller than the turbo inlet which is 4".
I had a very very small K&N cone filter but still had to deform the shape to fit it in there. I was thinking of putting a screen over the inlet, any advice on how i should do it? should I put 2 fine screens or should I put 2 screens on each side of some sort of filtering material?
thanks for the advice.
Jimmy
BavarianLove
08-30-2011, 06:37 PM
I think George K. @ ICS has a bolt on 4" intake pipe that routes around the subframe just for this type of setup.
really? i just dont see how it can fit with the ac compressor in.
BavarianLove
08-30-2011, 06:51 PM
Give him a ring.
Here ya go
http://forums.bimmerforums.com/forum/showthread.php?p=19648904
mike radowski
08-30-2011, 07:09 PM
There are a few ways to go about it. Make a compressor relocation bracket, space the sway bar lower, grind away the factory compressor bracket to paper thin nothingness, or run the filter upwards.
With a steedspeed manifold you can fit a 3.5" slightly ovaled pipe up into the engine bay. You can probably fit a 4", although I haven't tried.
Definitely don't run a screen on a bottom mount, unless you have an unlimited budget and like sending debris through your engine. If you run a screen small enough to effectively filter things, it won't flow nearly as good as the smallest pleated air filter.
milKt
08-30-2011, 07:32 PM
No such product
.
Is it time to talk about intake PIPE/filter size again?
Any graphs showing differences between overall power changes due to intake PIPE size? with and without smaller diameter pipe/filter?
mike radowski
08-30-2011, 09:59 PM
I saw a 4" intake and I was impressed that they snaked it in! The problem was the bracket was pretty much non-existent with all of the clearancing. The motor ended up basically sitting on the intake pipe. We had another customer that machined some blocks to drop the sway bar mounting points lower, allowing more clearance. That plus a modified or different AC bracket should allow for ample clearance with some creative piping.
dcvee
08-31-2011, 07:42 AM
I have an AC bracket that lowers the AC pump. Who wants to manufacture it? I don't have the time.:(
Don
pbonsalb
08-31-2011, 07:57 AM
I am using a bracket to raise the AC compressor. I am also using 4 inch oval stainless exhaust pipe and it does snake a bit over to passenger foglight area. I still had to clearance the AC bracket in the area of the tensioner system mounting, but I think it is strong enough. Time will tell. The problem with raising the AC compressor is that the compressor pulley gets very close to the lower radiator hose. On an aluminum raidator, a custom right angle outlet could be welded on.
Lowering the swaybar 1 inch and using oval pipe might be the best idea. Anyone have spacers for the swaybar? The stock support has some curves to it so I am not sure what the spacers would look like.
cragg56
08-31-2011, 08:22 AM
What size filter are people running who route the intake behind the passenger side head light? Also anyone have any pics of their filter installed there and the intake pipe? Just looking to see what piping bends need to be made to snake the pipe past the exhaust manifold and ac compressor and then be able to fit a filter behind the headlight and not interfere with the little pipe sticking up off of the AC dryer, the radiator temp switch, the A/C lines or the headlights themselves. I have been working on making an intake very similar to the picture posted on TRM's website.
http://www.racersmarket.net/components/com_virtuemart/shop_image/product/Stage_II_TRM_Tur_4925dac99f428.jpg
Also curious if anyone has a filter setup described above that also retains the washer fluid tank? Last wondering if anyone has any pics of their piping routed above the subframe while retaining the A/C compressor
milKt
08-31-2011, 08:59 AM
...and I dont want to go smaller than the turbo inlet which is 4".
Jimmy
Why not?
rt turbo
08-31-2011, 10:11 AM
Why not?
flow. Dont you remember that HPF thread documenting the fairly drastic spool, and power increase by going from the old smaller diameter pipe to a full 4" pipe? Turbo manufacturers make the inlets on certain turbos a certain size for a reason.
Jimmy, I think the AC bracket is the biggest space invader there, we should try and make a bracket. I wouldnt mind one for my car either so I can reinstall my a/c.
milKt
08-31-2011, 10:34 AM
flow. Dont you remember that HPF thread documenting the fairly drastic spool, and power increase by going from the old smaller diameter pipe to a full 4" pipe? Turbo manufacturers make the inlets on certain turbos a certain size for a reason.
No, I don't remember, but I just found it.
http://forums.bimmerforums.com/forum/showthread.php?t=1134410&highlight=hpf+turbo+inlet+pipe+diameter
So when they tried their HARDEST with the Stage 4 and obviously tweaked the tune, they went from 800-900whp,
but they advertised only 10-25whp gains for the Stage 1-3 cars, going from 3" intake pipe to 4" intake pipe. :( (my point)
I understand the turbo manufacturers make very similar inlet housings for MANY different sized exducer wheels; hence, what is the reason for these standardized inlet sizes?
Unless there is some other info provided for turbo inlet size to intake pipe size, a 3.25":) - 4" intake pipe (on a 4" turbo inlet) will offer very similar numbers.
:buttrock
rukman
08-31-2011, 01:37 PM
flow. Dont you remember that HPF thread documenting the fairly drastic spool, and power increase by going from the old smaller diameter pipe to a full 4" pipe? Turbo manufacturers make the inlets on certain turbos a certain size for a reason.
Jimmy, I think the AC bracket is the biggest space invader there, we should try and make a bracket. I wouldnt mind one for my car either so I can reinstall my a/c.
One thing with the HPF piece is that it is not a uniform 4" intake pipe. They maximized volume by using available space to generate an piece that is asymetrical but maximizes volume.
another thing the OP may want to look at is to use the AC compressor from the s52 M-coupe. IIRC, it's actually smaller unit compared to the normal s52 compressor. You may just gain a little bit of space. Not sure how it'll affect the effectiveness of the AC but hey..power comes at a price :)
rt turbo
08-31-2011, 01:42 PM
One thing with the HPF piece is that it is not a uniform 4" intake pipe. They maximized volume by using available space to generate an piece that is asymetrical but maximizes volume.
another thing the OP may want to look at is to use the AC compressor from the s52 M-coupe. IIRC, it's actually smaller unit compared to the normal s52 compressor. You may just gain a little bit of space. Not sure how it'll affect the effectiveness of the AC but hey..power comes at a price :)
both good points. Though, the bracket is the biggest reason for it being in the way.
mike radowski
08-31-2011, 01:57 PM
One thing with the HPF piece is that it is not a uniform 4" intake pipe. They maximized volume by using available space to generate an piece that is asymetrical but maximizes volume.
another thing the OP may want to look at is to use the AC compressor from the s52 M-coupe. IIRC, it's actually smaller unit compared to the normal s52 compressor. You may just gain a little bit of space. Not sure how it'll affect the effectiveness of the AC but hey..power comes at a price :)
Good info.
Alexlm
08-31-2011, 02:32 PM
What size filter are people running who route the intake behind the passenger side head light? Also anyone have any pics of their filter installed there and the intake pipe? Just looking to see what piping bends need to be made to snake the pipe past the exhaust manifold and ac compressor and then be able to fit a filter behind the headlight and not interfere with the little pipe sticking up off of the AC dryer, the radiator temp switch, the A/C lines or the headlights themselves. I have been working on making an intake very similar to the picture posted on TRM's website.
http://www.racersmarket.net/components/com_virtuemart/shop_image/product/Stage_II_TRM_Tur_4925dac99f428.jpg
Also curious if anyone has a filter setup described above that also retains the washer fluid tank? Last wondering if anyone has any pics of their piping routed above the subframe while retaining the A/C compressor
a have the same problem :S, this picture looks good. Where can I buy that intake?
I have an AC bracket that lowers the AC pump. Who wants to manufacture it? I don't have the time.:(
Don
:wave
We can take care of that for you! I wouldn't mind one for my own car.
rt turbo
08-31-2011, 03:39 PM
:wave
We can take care of that for you! I wouldn't mind one for my own car.
Ditto!
mike radowski
08-31-2011, 03:54 PM
I would like to see some installed pics!
I would like to see some installed pics!
There was a picture posted before. It looks like a slightly bent steel plate with 4 threaded posts welded to it.
It would probably be a good product to make 15 pieces or so and have a group buy...then have a few left over available for stragglers.
I only "need" one, but might as well make a dozen of them at the same time since the plating shop I use has a $120 minimum lot charge....if Don is willing to share of course.
milKt
08-31-2011, 04:24 PM
Maybe make a multi-piece set-up: a/c bracket and intake pipe for E36??
mike radowski
08-31-2011, 04:31 PM
So many different piping and manifold configurations makes it difficult to make a "standard" part. The compressor bracket is more of a universal thing.
There was a picture posted before. It looks like a slightly bent steel plate with 4 threaded posts welded to it.
It would probably be a good product to make 15 pieces or so and have a group buy...then have a few left over available for stragglers.
I only "need" one, but might as well make a dozen of them at the same time since the plating shop I use has a $120 minimum lot charge....if Don is willing to share of course.
I would probably by one as well
dcvee
08-31-2011, 04:48 PM
There was a picture posted before. It looks like a slightly bent steel plate with 4 threaded posts welded to it.
It would probably be a good product to make 15 pieces or so and have a group buy...then have a few left over available for stragglers.
I only "need" one, but might as well make a dozen of them at the same time since the plating shop I use has a $120 minimum lot charge....if Don is willing to share of course.
I'm more than willing. Hell I'll send you the Solidworks drawing. It's a simple flat laser cut piece with 4 D&T posts on it. It uses the slave pully "eccentric" setup that the alternator uses(stock BMW part). I have one on Switlik's car now and so far, no issues.
I have 4-5 items I was considering making but I'm just kidding myself with my time frames and really rather just build engines!!!
Don
NickG
08-31-2011, 04:53 PM
What about a bracket that relocates the AC compressor above the alternator? Now that'll create a bunch of space for an intake pipe ;)
I'm more than willing. Hell I'll send you the Solidworks drawing. It's a simple flat laser cut piece with 4 D&T posts on it. It uses the slave pully "eccentric" setup that the alternator uses(stock BMW part). I have one on Switlik's car now and so far, no issues.
I have 4-5 items I was considering making but I'm just kidding myself with my time frames and really rather just build engines!!!
Don
I'm certainly not going to ask you to give anything away! Maybe I can have these built and we do a group buy, then you get some for free?
I'm going to throw out a wild ass guess of $50 per bracket, with cad plating....that's just based on the one picture I've seen and your description.
rt turbo
08-31-2011, 05:45 PM
IL SEND MONEYS ASAP FOR THIS! YES! Ive been waiting for something like this.
milKt
08-31-2011, 06:33 PM
So many different piping and manifold configurations makes it difficult to make a "standard" part. The compressor bracket is more of a universal thing.
yeah,
with the near 10 regularly used turbo manifolds now for our m50/s50 based boat anchors, differing between top/bottom mount and a few different heights for bottom mounts, there would be no standard turbo intake.
The DCVEE A/C Relocation Bracketron could be very helpful though. Don would have to quit his day job and take a month off from his night job. :stickoutt
Colby Colbs
08-31-2011, 06:57 PM
please also take note that your wheel on the intake side is the limiting factor of air flow... A 3" id tube would be fine for that turbo your wheels prob around 70mm give or take and 3" id would be 75mm so your wheel would be the restriction not the other way around... plus its not like you have to chop off the 4" inlet, meaning you'll still have the scroll area...
rt turbo
08-31-2011, 07:00 PM
please also take note that your wheel on the intake side is the limiting factor of air flow... A 3" id tube would be fine for that turbo your wheels prob around 70mm give or take and 3" id would be 75mm so your wheel would be the restriction not the other way around... plus its not like you have to chop off the 4" inlet, meaning you'll still have the scroll area...
I also think flow is not the main reason, its the better dynamics of the air flow into the compressor. It is to help reduce gulping of air.
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