Fabspeed cold air intake anyone?

[rrental]

Anyone familiar with the fabspeed cold air intake system? Almost made up my mind for the muffler, and this would be a great addition. (I think...)

Porsche: 911 Turbo 930 Cold Air Intake System

Fits all 911 Turbo/930/C2 Turbo 965 Vehicles 1976-1994
POWER that you can definitely feel and hear. Dramatically cleans up and simplifies your 930’s engine compartment. Much easier to work with engine, save $100's in labor during routine maintenance. No steel Air box- No heat sink to absorb heat and heat up intake.
Saves maintenance time, and weighs much less, for better handling and cooler engine temperatures.
Developed and sold exclusively by Fabspeed Motorsports. Manufactured under license by BMC Italy. More Cold air flow, and more power.
High velocity air flow supports up to 550 HP.
The very best high performance air intake systems for all 911 Turbo 930 cars. 1978-1994. Fits C 2 Turbo cars too.

[Aggie93]

Read this thread. It seems to be consensus around here. I have not installed it yet, but its on deck for this winer.

BMC F1 Air filter failure

[Akila]

Good reading:WTB Cold Air Intake

[Tt surgeon]

I prefer the stock unit myself.

[Miguel Antonett]

An option, under $40.

[full quack]

I may get flamed for this, but....
Doesn't drawing air from a hot engine compartment nullify the term "cold air".



Mark

[Miguel Antonett]

Mark, your statement makes sense; but if you think about it, the OEM arrangement breath from the same volumetric area, a couple of feet away but turbulance within the compartment makes it even. I personally like some of the advantages listed above.
There is also a believe that the inverted cone from the OEM - right above the metering plate - helps to create a laminar flow... so improving power. Like anyhting else there is trade. M2c

[wjfk32]

I like the giant potato smasher



Walt

[rrental]

Thanks for the replies, plan has been filed in the round bin underneath the desk....

Originally Posted by Miguel Antonett

An option, under $40.

Curious, what did you do with the return lines coming out of the air filter box?

[Miguel Antonett]

If you look closely, between the engine and the fire wall, there is a black rubber hose that connects the oil reservoir breather nipple to the top of the new air filter holder; using tee fittings in between, I connected the WUR, the fuel carbon filter cannister and the turbo breather. Been there for several years - no issues - just a clean/open engine bay. BTW, I have an adjustable WUR and Konis = the way to go.

[Richard930]

Here's another good thread including some examples of what people have done with the various pipes:

K&n air intake system for porsche 930

[JFairman]

This K&N fits good and comes with a big hose clamp. Lots of people have installed it with the foam rubber sound mat above it in place.
Amazon.com: K&N RU-5163 Universal Rubber Filter: Automotive

With a single edge razor blade you can easily cut a little V in the rubber to clear the CO adjustment post.
Remove the origonal CIS air cleaner gasket from the air flow meter and it fits like it was made for the car.

I tee'd the gas tank and WUR vent lines together and ran them to a small generic brass 5/16" 90 degree fuel line fitting I put in the rubber filter top. Drilled a hole in the rubber top a little smaller than the 1/8" npt threads and threaded it into the top of the filter. Hose pressed on the fitting.

[oilonly]

Originally Posted by Miguel Antonett

An option, under $40.

Miguel from my readings here you should have the larger off center port on the decel valve plumbed to the intercooler and the center one plumbed to the intake manifold or vented to atmosphere.JMHO

Here is a video how mine is set up. I have since tied up the breathers.
930 engine.3gp - YouTube

[Miguel Antonett]

Oilonly, I appreciate the feedback. But, how can you see the decel valve from that picture?
If you're referring to the aux air reg and the air valve grouping, there is no other way to connect them; recognizing that the air valve being "still there" is a weird specimen, but still works fine, BTW the back of it is venting to atmosphere eventhough it looks connected to the WUR - just the angle of the picture. Thanks!

[rrental]

Originally Posted by Miguel Antonett

If you look closely, between the engine and the fire wall, there is a black rubber hose that connects the oil reservoir breather nipple to the top of the new air filter holder; using tee fittings in between, I connected the WUR, the fuel carbon filter cannister and the turbo breather. Been there for several years - no issues - just a clean/open engine bay. BTW, I have an adjustable WUR and Konis = the way to go.

Thanks! Looks nice and clean! Do you have some more pictures from a different angle?

[JFairman]

Oil only is right - isn't that gold saucer valve that is so easy to see in your pic the vacuum limter valve porsche calls a deceleration valve? Sure looks like one.

You have the two larger hoses on the side facing the camera hooked up backwards so it is not working correctly. The small vacuum hose fitting on the other side that operates it if the two larger hoses are connected correctly should be hooked up to intake manifold vacuum. The way you have it any left over boost pressure is blowing the center hose internal valve that is attached to the middle of the internal vacuum diaphram off it's seat when you close the throtle during deceleration after some boost with no control from intake manifold vacuum.

The motor runs better consistantly and you can match revs during upshifts alot faster when it's tuned to run without that mechanical emission control and you remove it. But, if you work for the EPA or you're brainwashed into thinking it's a wonderful thing - leave it.

Originally Posted by Miguel Antonett

Oilonly, I appreciate the feedback. But, how can you see the decel valve from that picture?
If you're referring to the aux air reg and the air valve grouping, there is no other way to connect them; recognizing that the air valve being "still there" is a weird specimen, but still works fine, BTW the back of it is venting to atmosphere eventhough it looks connected to the WUR - just the angle of the picture. Thanks!

[oilonly]

What JFairman said. I keep it hooked up because it reduces popping. Yes it keeps the revs hanging up but that is a trade off I'll accept for now.

[JFairman]

Mine popped alot on decel with the stock lambda fuel head without the decel valve and when I put on a 20% nigher flow modified fuel head from CIS Flowtech the popping was reduced alot. Now it just burbles and makes a few random soft pops on decel. Not bad at all.

I sold my working decel valve a long time ago. I have a piston type 25mm blow off valve in the C2 CIS elbow hose and a second piston type 32mm blow off valve vented to atmosphere under the Kokeln intercooler.

No shims are under the spring in my sideways mounted turboXS 25mm recirculation valve so it opens quick around 15" of manifold vacuum before the 32mm valve opens and 3 or 4 shims are under the spring in the 32mm valve vented to atmosphere so it doesn't open until manifold vacuum is up around 20" of mercury.
Compressor surge is reduced even more when the throttle is closed this way and I like how it's working. The 32mm valve makes a nice little woosh noise I like as it vents air between boosted upshifts.
My car idles at 12" vacuum when warmed up so both BOV's are closed at idle.

[RarlyL8]

The round bronze component in Miguel's picture is the AAV (aux air valve) and it is hooked up correctly. The DV (decel valve) is located under the intercooler and is connected to the intake manifold and 930 BOV housing.
These 2 devices look alike and are easily confused.
Most 930 engines do not have an AAV even though the OEM intercooler has provisions for it; that provision is typically blocked off with a factory hose cap. I've seen this valve on the California emissions engines but don't know if they came on any others.

Cold air intake is definitely a misnomer, if not simply out and out deception. I've seen claims of added power but never found that to be true in any of my dyno runs. THE single reason to use the pop-on filter is to clean up the engine compartment. I've been using some form of this filter for years and just love it.

[JFairman]

what does this early 930 aux air valve that looks just like a deceleration valve do?