53 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHOrange Cap mod
Leading reported evidence
Clean throttle body
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I revisited this mod about 2 weeks ago after I cleaned the throttle body and changed the air filter.
Leading evidence: 'Clean throttle body' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'good way' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Clean throttle body' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I revisited this mod about 2 weeks ago after I cleaned the throttle body and changed the air filter.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
Didn't have a orange cap though, I used the bottom fifth of a plastic "sample" cup (yeah that's right a "pee" cup).
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I used the cap to a one quart castrol oil container.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
good way
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause
Probably a good way to go, I thought if I didn't like it i'd just resell it here locally - lucky for you guys its $65 for me with the exchange rate and GST ebay is now charging it became $105AUD
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
53 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
2 acknowledgements have no verified action link; they do not establish a repair result.
Haha...me too! A newbie all excited about the orange cap then.
I think I still have 2 of those magic caps laying around somewhere...
I ordered a sample (of 2 pcs) and one of the members here sent me one.
There must be at least a dozen threads on this... click the search button on top, and choose 'Advanced" type in 'Orange Cap' choose 996 Forum, click search.
Just did this. Didn't have a orange cap though, I used the bottom fifth of a plastic "sample" cup (yeah that's right a "pee" cup). It fit tight over the bung to which the small elbow fits. After I covered over the hole, I refit the small elbow, and clamped the whole thing down tight. You'd think I woulda taken a few picturs eh? Well I didn't and I feel kinda bad.
I don't feel so bad though about the whoop-*** noise my car makes now at big throttle openings. Around the residential streets or whatever it sounds as sedate as it always did (my wife likes it that way and if she's not complaining about my porsche like she used to with my old car then that's OK by me). Lay hard on the throttle on the highway though and people are freaking out, slamming on their brakes around me because they think hell is raining down fire on them. It's great!
Damn feels faster too although I know that's just my "mind" playing tricks on me.
For those of you still sctatching their heads - be aware that the small elbow does not lead into the actual air box where the air filter lives. It leads to a small compartment within the air box that just dead ends. Most cars have these "resonance" chambers now to mitigate intake noise. On my subaru and even on my old mustang, there were dirty great horn shaped things inside the fender well. Over on the Subaru board (NASIOC) they call it a "snorkus-ectomy" when you take the horn out. Similar concept...a little more noise and better air flow. Not sure if the 996 mod gives better air flow.
Anyway - Nice $0 mod. Plus I got to inspect the cleanliness of my air filter...it's fine.
Does anyone know where one can still get these orange caps? I searched the Niagara Plastics site for Part No #273-1P, but it doesn't seem to exist anymore.
I an very curious to try out this mod.
I'm in the same situation as myrmidon. Searched the Niagara Plastics site and couldn't find it and could not successfully email the rep. If anyone can help out it would be appreciated.
Thanks
I am the only one on the board who has not done this.
Can someone just give me the dimensions?
I have caps like that at work in just about any size. I will try to hook up some newbies if I have the size.
Cory - don't worry about the Orange Cap mod... 'cuz it will not work on Tip cars. Sorry, dude, you are at a dis-advantage again!
BTW - I'm just kidding! It will work in your car!
Hi All,
While I no longer have my 996, when tidying up my garage I discovered that I still have a single Orange Cap (picture below). If anyone is looking for one, please PM me.
Regards,
Olaf
If the opening is the same as the 997's - the cap to a Mobil One 5qt oil jug fits as well. It's not red and doesn't say Fabspeed or cost $200 but it still works.
For those that want more info - look for Helmholtz Resonator in your search.
I did the helmholtz delete about a year ago. I went with the Oatey test plug and a 996 silicone tube off ebay. I ended up taking it off because it felt like it lost low end torque. I revisited this mod about 2 weeks ago after I cleaned the throttle body and changed the air filter. I noticed that in 4th gear when I'm going past 5,500 rpm it takes longer to rev up than without it. I have since put it back to stock and it climbs faster now. Anyone else experience this?
I used the cap to a one quart castrol oil container. Fits perfectly. then I just re-installed the stock elbow. It does make a cool noise around 5k rpm with WOT.
I see two popular methods for doing this: (1) Orange cap, which is no longer available, and (2) Castrol oil cap. I do not have a castrol oil bottle right now, and mainly use Mobil 1. I see some people mention a trip to Home Depot, but they didn’t share any other details which item to buy.
What othef options do I have for doing the Orange Cap mod?
Can I still install the stock air tube over that test plug? It looks kind of bulky.
EDIT: I found this tread which gave institutions how to request the sample.
https://rennlist.com/forums/996-foru...e-cap-mod.html
https://www.homedepot.com/p/2-in-PVC...-100372303-_-N
This might allow the elbow to be fitted over it.
Or,
https://www.homedepot.com/p/Oatey-2-...-100137732-_-N
I've read no performance loss or gain... Few people saying otherwise.
In another thread I started here:
https://rennlist.com/forums/996-foru...resonator.html
@Porschetech3
did say there was no gain or loss - if my memory serves me correctly...
I bought the 1-1/2' knockout cap, from Home Depot, after the 2" was too big, and while it almost seems too small, with the lip it fits perfectly. I took the car for a ride, and definitely heard a difference in the 5K and up range. It had a very nice sound. I felt no difference in the power band. When I returned, I popped the hose off to make sure the cap had not moved, and it was still sitting perfectly.
All in all, a pretty cool mod for no time, and no money.
Here's the other end of the scale...
https://www.ebay.com.au/itm/Porsche-...k/322582790907
Have one of these on order - I didn't like the idea of having a plastic cap in the intake and had been looking for a metal one.
Thanks to
@cds72911
for finding and sharing this.
Hi Dan....I saw this on another thread, and considered it, but first wanted to see if it really did anything before considering spending the 65 dollars. I will admit, there is a part of me that would like to have that nicely machined piece of art, but want to see if I even keep the mod. I am getting a Fister mod done to my exhaust in a couple of weeks, so will decide then. Good luck, I hope you enjoy the new sound!
Probably a good way to go, I thought if I didn't like it i'd just resell it here locally - lucky for you guys its $65 for me with the exchange rate and GST ebay is now charging it became $105AUD
The 2" works if you're replacing the silicone hose.
If you're staying with the stock hose, you'll need the smaller one.
I first tried with duct tape and then decided it sounded a little better.
I went with 2" and new hose, before I gave it away.
I now have Fabspeed for cool noise and cool looks.
No, with the orange cap mod you'll see no change in HP or Torque, but staying with what most "high performance" parts companies say:
TexSquirrel High Performance Bottle Cap Mod
Up to 10HP and 15 ft/lbs of Torque increase*
* Performance increase is not guaranteed. Results may vary. Not responsible for any damage caused by misuse.
Please don't order one from me!
I had a fabspeed one but sold it - literally a generic red silicone hose and a "carbon fibre look" block off that you remove the box and replace it with the part.
