12-13-2017, 10:01 AM
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#21
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1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 3,093
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Did I stump the pros? Nothing?
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1998 Porsche Boxster
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12-13-2017, 10:13 AM
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#22
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Registered User
Join Date: Oct 2014
Location: Peterborough Ontario Canada
Posts: 148
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I am curious if anyone has any experience with this mod. Pedro states that it is really only for improved sound.
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1999 Boxster, Ocean Blue Metallic-grey top.
LN IMS dual row-, Ben's short shift kit
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12-13-2017, 11:17 AM
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#23
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Registered User
Join Date: Apr 2012
Location: Riverside, CA
Posts: 1,666
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Quote:
Originally Posted by pilut2
I am curious if anyone has any experience with this mod. Pedro states that it is really only for improved sound.
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Most any of the mods done here will have little affect on the HP or Torque without an accompanying change to the computer mappings to take advantage of improved flow etc.
However some mods lead to faster response, improved sound, better functioning etc so it depends what your goals are when you consider an "Improvement".
Like Pedro said, improved sound in case desnorkling does not get you the sound you are looking for.
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"It broke because it wants to be Upgraded  "
2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)
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12-13-2017, 12:41 PM
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#24
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Registered User
Join Date: Nov 2006
Location: In the garage...
Posts: 1,737
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Quote:
Originally Posted by Starter986
Did I stump the pros? Nothing?
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Don't think the juice will be worth the squeeze...
But if it makes you happy then go for it!
Good luck 
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"Cool Prius!" - Nobody
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12-13-2017, 01:50 PM
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#25
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Certified Boxster Addict
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
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Quote:
Originally Posted by Starter986
What purpose does that vacuum serve on the 98 Boxster?
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Vacuum is commonly used as a switching mechanism vs. relays and solenoids.
Quote:
Originally Posted by Starter986
Further, to further massage your intellect, ...
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None of us are here to "massage our intellect". We're here to share our knowledge and passion for Boxster's.
Quote:
Originally Posted by Starter986
...what changed after 1999 that rendered that line absent? What method did Porsche employ in later models to achieve the same result enjoyed on the 97/98/98 models? What was the workaround?
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There wasn't much point in responding to these rhetorical questions. Your question was answered - you'll need to find a way for the Pedro exhaust to provide vacuum to the Tip transmission.
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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12-13-2017, 02:21 PM
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#26
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1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 3,093
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Quote:
Originally Posted by thstone
Vacuum is commonly used as a switching mechanism vs. relays and solenoids.
None of us are here to "massage our intellect". We're here to share our knowledge and passion for Boxster's.
There wasn't much point in responding to these rhetorical questions. Your question was answered - you'll need to find a way for the Pedro exhaust to provide vacuum to the Tip transmission.
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Thank you for the response. That would explain something I read along the lines of at a certain point a valve opens/closes, associated with the throttle.
With all due respect, I employed the 'massage the intellect' as my choice of words because it appeared that no one was responding to the original actual inquiry. It appeared that no one had an answer to my inquiry(s). In the future I'll tone down the vernacular to mitigate misconceptions, and to provide balance.
My other questions weren't rhetorical. I'm quite curious, now having been bitten by the Porsche bug. I've an eye on future Porsches, and for something that might seem innocuous, that vacuum line for example, I'm interested in learning about the progression. The improvement. That would be a general discussion and, last I checked, this is the forum for it. The BMWs I mastered the same way, and it was learning from people with many, many posts and lots of bruised-knuckle experience. People like you, likely. So, thank you.
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1998 Porsche Boxster
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12-16-2017, 04:51 AM
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#27
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Registered User
Join Date: Jul 2017
Location: Tucson AZ
Posts: 536
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If it doesn't do anything other than increase noise, why bother? Do you want your Porsche to sound like a ricer with a cheap CAI? 
There are mods that will improve your car's performance that are easy and (relatively) cheap, like an under drive pulley or a spin on oil filter kit. Or even a magnetic drain plug.
"Cool Prius!"
- Nobody
You haven't seen my Prius.
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2001 Boxster
2007 Toyota Highlander
2003 New Beetle Convertible, Turbo, Tip 6 speed 
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12-16-2017, 05:08 AM
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#28
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550 Anniversary
Join Date: Jul 2012
Location: Surrey, UK
Posts: 747
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Quote:
Originally Posted by Brian in Tucson
If it doesn't do anything other than increase noise, why bother? Do you want your Porsche to sound like a ricer with a cheap CAI?
There are mods that will improve your car's performance that are easy and (relatively) cheap, like an under drive pulley or a spin on oil filter kit. Or even a magnetic drain plug.
"Cool Prius!"
- Nobody
You haven't seen my Prius. |
How many extra bhp does the magnetic drain plug give?
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Current: 550 Spyder Anniversary- Carnewal exhaust - 100 cell cats - stainless manifolds - 4" underdrive pulley - poly gearbox mounts - rear lower alu brace - adjustable rear toe links
Sold: 986S - Zenith Blue - 18" Sport Classics - Black Zunsport grilles - Stainless silencer and manifolds - K&N panel - shortshift - M030 suspension - 75mm throttle body - custom 83mm intake - SmartTop - custom remap - MDS underdrive pulley
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12-16-2017, 05:43 AM
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#29
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"50 Years of 550 Spyder"
Join Date: Jun 2015
Location: The Road
Posts: 961
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On your car, 264hp.
That’s how many horses you will prevent from leaving the stable if your engine grenades due to metal in the oil. An ounce of prevention...
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550 SE #310---"It's more fun to drive a slow car fast, than a fast car slow."
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12-16-2017, 06:03 AM
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#30
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1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 3,093
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Quote:
Originally Posted by Brian in Tucson
If it doesn't do anything other than increase noise, why bother? Do you want your Porsche to sound like a ricer with a cheap CAI?
There are mods that will improve your car's performance that are easy and (relatively) cheap, like an under drive pulley or a spin on oil filter kit. Or even a magnetic drain plug.
"Cool Prius!"
- Nobody
You haven't seen my Prius. |
Yes. A ricer. I'm looking at fart-can pipes on eBay, too. 2 footers straight out the back, 6 inch cans. 26HP gain.
That under-drive pulley I've looked at... but read somewhere that there's a small piece that has to be ground down in order for that pulley to fit. Is that correct? I've the pulley on my Pelican wishlist... but have held of purchasing it until I know it'll just bolt on... no extra shimming.
The spin on filter in on that list, too.
AOS is next on the list of parts I'm hoarding, for in the spring I'll replace the AOS, plugs, tubes, water pump, thermostat, etc.
Cheers!
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1998 Porsche Boxster
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12-16-2017, 10:20 AM
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#31
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Registered User
Join Date: Nov 2006
Location: In the garage...
Posts: 1,737
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Quote:
Originally Posted by Brian in Tucson
"Cool Prius!"
- Nobody
You haven't seen my Prius.
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"Cool Prius!" - Nobody
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12-16-2017, 02:38 PM
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#32
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Certified Boxster Addict
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
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Quote:
Originally Posted by Starter986
That under-drive pulley I've looked at... but read somewhere that there's a small piece that has to be ground down in order for that pulley to fit. Is that correct? I've the pulley on my Pelican wishlist... but have held of purchasing it until I know it'll just bolt on... no extra shimming.
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Yes, a portion of the boss on the engine case needs to be ground down a bit in order to install the under drive pulley. Full removal of the boss isn't recommended as the boss might need to be used at a later date to hold the engine at TDC for repairs.
The installation recommendation is to only remove enough of the boss to clear the UDP while still retaining enough of the boss for future use.
This thread has relevant information and discussion. Do a search on "under drive pulley" and you'll find that this subject has been well discussed.
Installed the raby under-drive pulley
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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12-16-2017, 04:53 PM
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#33
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Artist, 986S tinkerer
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,821
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If you are considering tracking your car, then I would highly recommend a UDP. Not for the HP gain, which may or may not exist, but just to play nice with your peripherals, especially your PS pump. 
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James now has: 2008 987S 6 speed
Crashed: 2010 987.2 pdk in speed yellow!
Sold to a cool racer chick: 2004 986 S
YouTube channel: the PORSCHE as seen by NewArt
www.youtube.com/channel/UCohdrH2xHTklM1thxk0KKOQ?
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12-16-2017, 06:25 PM
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#34
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Registered User
Join Date: Dec 2012
Location: FL
Posts: 4,144
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For me I did the UDP for ps reasons as mentioned above, and imaginary or not, it felt like a nice little bump in power, especially in 1st and 2nd.
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12-17-2017, 04:47 AM
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#35
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Registered User
Join Date: Jul 2017
Location: Tucson AZ
Posts: 536
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Quote:
Originally Posted by edc
How many extra bhp does the magnetic drain plug give? |
At least 15.
__________________
2001 Boxster
2007 Toyota Highlander
2003 New Beetle Convertible, Turbo, Tip 6 speed
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12-17-2017, 05:15 AM
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#36
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1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 3,093
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Quote:
Originally Posted by thstone
Yes, a portion of the boss on the engine case needs to be ground down a bit in order to install the under drive pulley. Full removal of the boss isn't recommended as the boss might need to be used at a later date to hold the engine at TDC for repairs.
The installation recommendation is to only remove enough of the boss to clear the UDP while still retaining enough of the boss for future use.
This thread has relevant information and discussion. Do a search on "under drive pulley" and you'll find that this subject has been well discussed.
Installed the raby under-drive pulley |
Thank you. Read the material... the boss... makes sense.
Cheers.
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1998 Porsche Boxster
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