Air intake question

[bobe]

I would like to install a K&N cone type filter on my '84 944
What do I do with hose that goes back into the filter box
from the fuel meter thats on the stock configuration.

Thanks

[ERAU944]

you can delete it if you like, later models had the end of the belt covers blocked off.

[Icey1174]

What is that hose for anyway? I wondered why the belt covers would have such a hose. Is it for cool air? There has to be some reason they put it there. If they blocked it off in later models then it must not have made that big of an impact.

[Blondie]

Theres a drain hole on the bottom of the belt covers and an intake hose in the top....I think its safe to assume that it was for cool air.

Mind you, I've heard a better theory that made more sense than that but I cant remember what it was lol

[Eldorado]

they blocked it off on later models because it was a potential hazzard. cant remember if it was you somehow got some water in and around your belt area, it would throw it up into the intake, or vice versa... that's why it was deleted.

It was originally there for, I assume, cooling. there was a bulletin posted about needing to delete it and capping both holes.

[Icey1174]

Maybe I should delete my hose and cap the hole!

[Icey1174]

Are we talking about the same hose as Bobe?

[bobe]

It's the hose from the upper intake above the filter leading into
what appears to be the back of the timing cover. So the consensus is to block or cap it ?

[blk924s]

Remove the hose, cap the intake box

[Icey1174]

ok... cap it. Sounds like it was going somewhere else from the first post. I have an 87 and didn't know how much different they are. Sounds like the same hose on all of them.

[Eldorado]

dont forget, cap both holes.
on the intake side, all I did was make a star * over the hole with short strips of black electrical tape, and then used the tape around the outer perimeter of the "tube" that's sticking out to hold all the ends down.... cant even see the edges... and it's held well for a year and a half and counting.
i haven't blocked the hole on the timing cover yet.

[onZedge]

The breather hose is there to cool and ventilate the belts. There were two TSB's that were generated for idiots who decided it was OK to drive their Porsche's in deep puddles and streams. The first TSB involved cutting about 12" off the snorkel to prevent water from getting sucked into the engine resulting in hydro-locking. It is worth noting that doing this defeats the cold air intake function of the snorkel, much like removing the factory air filter housing and replacing it with a "400 HP" cone filter. The second TSB involved removing the belt housing breather hose and plugging both nipples also to prevent hydro-locking. In deep water, the balance shaft belt acts like a pump, sending water directly into the air filter housing. I choose not to drive in deep puddles and streams so I did not perform either TSB.

[jezza944]

A champaigne cork fits nicely into the timing cover. Did that when I fitted my cone. Only side affect, and a good one, was the affect a bottle of bubbles had on my wife!

[onZedge]

It is interesting to note that your starter will become submerged before the water level requires these aforementioned TSB's. When I lived in Connecticut, overwhelmed storm drains caused localized flooding. When this happens during the winter, when roads are salted, the resulting puddles are quite conductive. People drive in, but they don't drive out.

[ERAU944]

i haven't performed either TSB, nor will i. i am not a challenged individual, and i know where and how to drive my car. i'm responsible enough not to get into a situation where my motor could be hydrolocked, and don't feel that the TSBs are necessary as long as good judgement is exercised.

unfortunately, not everyone is capable of using good judgement, hence the reason for the TSBs. as for me, i'll keep the cold air, and keep the belts cool.

in your case, plug off the hose or nipple on the belt cover, and don't worry about it!

[bholmes]

I found that the cap that is commonly found on the end of a new joint of cast iron gas line fits quite nicely. I'm not sure what diameter of tubing I got it off of, but it fits perfect. Find the right place and they'd probobly let you have one for next to nothing.

[Icey1174]

Ya know... I said the same thing about knowing the roads where I live and that we do not get flooding. Well.... this one day.... I was out driving the 944. It was raining for a few days, no big deal. Well while I was out it poured down rain like I never seen before. The streets were flooded instantly! Flooding does not happen here. I was a fool to boast about not driving in water in a different post. Now I will seriously consider deleting the hose and caping the holes. Porsche would not send out a TSB for no good reason.

[ERAU944]

if that were a possibility here i might think about doing the TSB's. during the rainy season, i'm very familiar with where there are areas susceptible to large pools of standing water, and i either ford them very slowly or avoid them depending on traffic. when i'm in an unfamiliar area with standing water, a little caution is all it takes. as i've learned from being a pilot, a few hours of inconvenience waiting for the weather to improve is better than becoming a statistic, or paying for a mechanic's kid to go to school.

[bobe]

Thanks everyone. So is it worth putting in a cone filter or will the performance be be nominal as compared to the stock system.

[ERAU944]

the performance will best case be the same, most cases it will be less due to hotter air. i had one, and went back to the stock box. i would save your money, and use it to upgrade/replace worn suspension pieces