| View previous topic :: View next topic |
| Author |
Message |
michaelodonnell123
Joined: 20 Mar 2015
Posts: 235
Location: New Jersey
|
 Posted: Tue Jul 21, 2015 8:08 am Post subject: Aftermarket air intake |
 |
|
Just wondering if anybody could post some pics of their aftermarket air intake. I do know that the stock intake does the job well, I am just curious to see what others are using.
_________________
MOD
1988 Porsche 924S
2007 Jaguar XK
2012 Fiat 500 |
|
| Back to top |
|
 |
ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
|
| Posted: Tue Jul 21, 2015 11:51 am Post subject: |
|
|
What originally came on the Club Sport car:
Post rebuild / pre-charge-cooler:
941 pre-rebuild:
Same piece with hydrographics just prior to rebuild:
_________________
erstwhile owner of just about every 924 variant ever made |
|
| Back to top |
|
|
michaelodonnell123
Joined: 20 Mar 2015
Posts: 235
Location: New Jersey
|
| Posted: Tue Jul 21, 2015 1:30 pm Post subject: |
|
|
Looks really good. I like seeing when people use their imagination.
_________________
MOD
1988 Porsche 924S
2007 Jaguar XK
2012 Fiat 500 |
|
| Back to top |
|
|
fiat22turbo
Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR
|
| Posted: Tue Jul 21, 2015 2:27 pm Post subject: |
|
|
Yep, hot air intakes take a lot of imagination. 
Show me an intake system that pulls cold air from a high pressure area and I'll show you some imagination.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
|
| Back to top |
|
|
Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
|
| Posted: Tue Jul 21, 2015 3:12 pm Post subject: |
|
|
Imagination? Did you call me by name? Cold high pressure air you say?
See my thread..
Ram air, Audi turbo comparo, and charge piping...
http://924board.org/viewtopic.php?t=41236&highlight=
This is still on my to do list but I got sick of hoses and piping for a while after my IC install..
_________________
80 Turbo - Slightly Modified |
|
| Back to top |
|
|
ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
|
| Posted: Tue Jul 21, 2015 9:50 pm Post subject: |
|
|
| fiat22turbo wrote: | | Yep, hot air intakes take a lot of imagination. |
Not sure if you're suggesting the above are "hot air intakes" but it's worth noting that they pull air from exactly the same spot as a "the stock intake" which "does the job well."
The main reason I went to cone filters had nothing to do with "cold air". I hate futzing with the stock airbox every time I want to inspect, troubleshoot, or repair anything in the front of the engine, including the crank bolt for turning the engine over for a variety of other maintenance and troubleshooting tasks. The stock airbox is a PITA to work around and remove. With the cone filter setup (which draws from EXACTLY the same spot as the stock setup), I loosen a couple of clamps and it's off and out of the way.
It's been noted by others elsewhere, and I agree, that the cone filter setup also provides a touch nicer sound to the induction on the 931. You can just hear the turbo and recirc valve working...enough to know it's there, but not enough to be ricer-annoying.
Another advantage: cone filters are washable and reusable, so I don't have to replace the ~$30 stock air filter cartridge.
Could more be done to isolate a cold air stream into the cone filter? Sure, although I doubt how much measurable difference it would make.
_________________
erstwhile owner of just about every 924 variant ever made |
|
| Back to top |
|
|
ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
|
| Posted: Tue Jul 21, 2015 10:28 pm Post subject: |
|
|
Some more research I'd previously done on the subject, some good ideas here (assuming the links still work):
And a good quote from Vaughan from this thread:
| 924RACR wrote: | Cold air can help, if properly done; must seal out any source of heat from the engine bay, and not create a chance to suck in water and hydrolock the engine (don't laugh, 944's can suffer from this).
Ram Air is a Pontiac marketing gimmick - don't believe the hype!
Cold air is best done by materials sourced from Home Depot. Don't laugh, real racers know you can find the best race parts there. Ricers buy K+N filters online, and slap the stickers on the car. Real racers get their own sheetmetal and weatherstripping from HD. Check out some IT cars sometime for what works, cheap.
I won't even get into K+N's and dirty air. Just don't think you can out-think Porsche so easily. Hondas and Nissans, et al, benefit greatly from air intakes and exhausts because they were designed as economy cars; comfort and economy. Porsche are, always have been, and should've will always be (Chili Pepper excepting) sports cars, and are designed as such - for performance.
Sure, there are ways to make them faster. It's not a cheap air filter and plastic scoop, though. Do some more research first. |
Note especially the warning regarding sucking in water. Eddie, in your link above, you mentioned using the stock dual horn location...I'd be a bit concerned that this could ingest water, especially on a lowered car.
_________________
erstwhile owner of just about every 924 variant ever made |
|
| Back to top |
|
|
ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
|
| Posted: Tue Jul 21, 2015 10:30 pm Post subject: |
|
|
| jrcook320 wrote: | Here's mine, basically the same thing as ideola's, aside from the fact that it's not a 931...  There was some good info on those links. I have an air box about half built right now. The beauty of my application is that the filter is already open to the grill.
 |
_________________
erstwhile owner of just about every 924 variant ever made |
|
| Back to top |
|
|
ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
|
| Posted: Tue Jul 21, 2015 10:30 pm Post subject: |
|
|
| ideola wrote: | Pix of Vaughan's air box setup on the race car:
 
 
 
  |
_________________
erstwhile owner of just about every 924 variant ever made |
|
| Back to top |
|
|
ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
|
| Posted: Tue Jul 21, 2015 10:31 pm Post subject: |
|
|
| J1NX3D wrote: | depends on how you're set up. i have a 944 water reservoir in my 924 that i could do the same thing with.
this is my stepdads racecars setup with a 944 i/i and i think hes getting a lot of heatsoak but i can't convince him to get cooler air to his pod filter. He thinks because the intake air goes through the i/c anyway it doesnt matter.
Sure the plumbing to get the filter over there would be longer (so insulating would be required) but would that matter? (im actually asking).
this is what the 951 guy has done for the non-RLers.
and his test results
| Quote: | The ambient temp when testing the "with partition" was 13.5 degrees C. The ambient temp when testing the "without partition" the ambient temp was 18.0 degrees C. So thats a 4.5 degree C difference. So keep that in mind when reading the charts. I have mapped IAT against MAP.
Also note I have 931 vents which I tested to reduce intake temps by a few degrees as well which influence the absolute results but were not changed between tests.
There was a one hour time delay between tests.
All data was collected at 80 degrees engine temp
WITH PARTITION
The typical cruise was consistently +1 degree C over ambient
The MAX degrees C was 28 or 15 over ambient
WITHOUT PARTITION
The typical cruise was consistently +6 degreec C over ambient
The MAX degrees C was 39 or 21 over ambient
So, it works great by the looks of things! Typically there was a 5 - 6 degree C improvement over the MAP range AFTER the ambient temp difference has been accounted for! |
|
_________________
erstwhile owner of just about every 924 variant ever made |
|
| Back to top |
|
|
michaelodonnell123
Joined: 20 Mar 2015
Posts: 235
Location: New Jersey
|
| Posted: Wed Jul 22, 2015 12:22 am Post subject: |
|
|
| fiat22turbo wrote: | Yep, hot air intakes take a lot of imagination.
Show me an intake system that pulls cold air from a high pressure area and I'll show you some imagination. |
I am not asking for what is the ideal setup here...I already said that I know that the stock air intake system does the job perfectly fine.
What I am interested in seeing is what others are doing besides using the stock intake. There are people that want a certain look and/or ease of access to the engine and do not want a stock intake. If they draw some warm air while sitting at a traffic light...so what life goes on.
_________________
MOD
1988 Porsche 924S
2007 Jaguar XK
2012 Fiat 500 |
|
| Back to top |
|
|
fiat22turbo
Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR
|
| Posted: Wed Jul 22, 2015 2:24 am Post subject: |
|
|
When I was running ITB's and MegaSquirt with filters, my intake temps would spike on hot days and stay hot whether driving or idling.
This is with the factory undertray and CGT lights, so lots of room in the engine bay.
Switching to a stock intake, single TB and a decent airbox with a cold air pickup, the intake temps dropped considerably and I could remove excess fuel from the tune.
but what do I know? I'm obviously a hater who is knocking your "styling" choices.
or perhaps, I'm just trying to help avoid the pitfalls I've seen?
Nah.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
|
| Back to top |
|
|
ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
|
| Posted: Wed Jul 22, 2015 3:59 am Post subject: |
|
|
As my wife has told me many times, it's not what you say, it's how you say it.
You've raised some good points regarding cold air intake, but yours is only one anecdote, and therefore not scientifically or statistically significant. Useful to know, but perhaps not conclusive.
In any event, the original question was "Just wondering if anybody could post some pics of their aftermarket air intake." Worth noting that the original question said nothing about cold air being the objective. There are other benefits to changing the stock setup, as noted above, besides trying to improve cold air intake.
_________________
erstwhile owner of just about every 924 variant ever made |
|
| Back to top |
|
|
Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
|
| Posted: Thu Jul 23, 2015 6:32 am Post subject: |
|
|
OK here ya go.. 2X 2.5" ID 90 degree hoses and 1 3" section of 2.5" OD pipe for a coupler.. Slice a little bit off your bottom airbox intake.. May even be able to run it with horns and an IC.. Pop up lights still work perfectly..
It doesn't get any easier than that, took me like 45 minutes with some good hose experiene under my belt 
I'll build a ram scoop down there sometime, and I'm thinking a flap, like an inlaw for a tractor exhaust pipe I could flip down/slide/put on in the rain if rain proves to wet the air filter.. I'll test in the rain when it rains..
Yeah you know that's badass..
_________________
80 Turbo - Slightly Modified |
|
| Back to top |
|
|
Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
|
| Posted: Thu Jul 23, 2015 6:50 am Post subject: |
|
|
I do agree that there's nothing wrong with the stock airbox, plenty of filter surface area and quality filtration..
Besides, I like to mod to where it still looks and works very original, I prefer the way it looks and is appealing to me that way, just massage the OE equipment instead of gutting and replacing.
A lot of these old OEM Porsche/VW parts are quite high quality items, no sense in tossing good German made parts, replacements on par in quality are spendy at best.
_________________
80 Turbo - Slightly Modified |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
924 FAQ (Technical)
