Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 01-23-2018, 06:22 AM   #1
Registered User
 
Join Date: Sep 2017
Location: Location Location
Posts: 67
Intake setup recommendation

Hey everyone,

I've been trying to do some research on what a reasonably priced intake setup would be for a 986 S from '00.

From what I have gathered:

a 987 airbox can be modded to fit (by cutting away part of the muffler and plastic-welding a hole), but there seems to be some issues with using the 3.25" MAF housing without reflashing. There has been some mentions suggesting either to cut out the 3" MAF housing from the 986 airbox and attaching that, but it seems like it doesn't work well since the filter screen would have to be modded as well. As an alternative to this, someone suggested using a Bosch 3" MAF housing, possibly sourcing it from BMW (I haven't seen any mentions of a part number for that though). Then there's the story about upgrading to a 996 or equivalent 74mm throttle body, and there are a couple of different options for plenums (IPD, 996, etc), Pedro's Garage seems to have discontinued their TechnoTorque2.

Does anybody have a recommended, end-to-end solution (airbox + maf + tb + plenum + tubing)?

Or, should it just be left stock?




square-root is offline   Reply With Quote
Old 01-23-2018, 07:12 AM   #2
edc
550 Anniversary
 
edc's Avatar
 
Join Date: Jul 2012
Location: Surrey, UK
Posts: 614
Garage
A quick cheap an easy way which gets results is 996 throttle body and plenum, a 1 foot circa 80mm alu pipe and 2 90 degree bends, a few jubilee clips.
__________________
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
edc is offline   Reply With Quote
Old 01-23-2018, 08:26 AM   #3
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,570
I'm currently doing this mod and will be posting a diy video soon.
See my posts below concerning dyno etc.
__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Old 01-23-2018, 10:52 AM   #4
Registered User
 
Join Date: Dec 2014
Location: Pasadena
Posts: 252
I found loosening the intake runner and fuel rail/injectors to be helpful in extracting the 986 airbox. Clearance is very little and it can be a bear to get out. And don't cringe but the engine cover tabs had to be bent up out of the way. This all because the 987 is physically larger going in. The grafting of 986 Maf to 987 Maf housing is a lot easier. Get a 40 watt soldering iron and plastic wire ties to plastiweld the two. Yes, you will have to procure a new smaller screen for the Maf. Then follow up with hoses and elbows to connect the Maf to the TB. I followed a fellow member Kram who posted a excellent tutorial with pics! Do a search on his post for details on the specifics for this mod. Thanks Kram!

If you want to follow up with the further addition of 996 TB and 997 plenum Kram includes it all.

Last edited by Lapister; 01-23-2018 at 10:56 AM.
Lapister is offline   Reply With Quote
Old 01-23-2018, 12:10 PM   #5
Registered User
 
Ciao's Avatar
 
Join Date: Dec 2015
Location: Denver
Posts: 762
Garage
What is the Net gain in HP after all this work is done?
__________________
5280 Cruising @High Altitude
Seal Gray & K&N Filter
Ciao is offline   Reply With Quote
Old 01-24-2018, 01:41 AM   #6
Registered User
 
Join Date: Sep 2017
Location: Location Location
Posts: 67
Quote:
Originally Posted by edc View Post
A quick cheap an easy way which gets results is 996 throttle body and plenum, a 1 foot circa 80mm alu pipe and 2 90 degree bends, a few jubilee clips.
Hmmm, won't the alu pipe, given its thermal conductivity, heat up the air as it moves between the airbox and the throttle body? Most people seem to prefer silicone tubing.
square-root is offline   Reply With Quote
Old 01-24-2018, 02:02 AM   #7
edc
550 Anniversary
 
edc's Avatar
 
Join Date: Jul 2012
Location: Surrey, UK
Posts: 614
Garage
Quote:
Originally Posted by square-root View Post
Hmmm, won't the alu pipe, given its thermal conductivity, heat up the air as it moves between the airbox and the throttle body? Most people seem to prefer silicone tubing.
You can use whatever you want. I originally mocked mine up using plastic drainage downpipe. This was cheap, readily available and gave results. For sure if you are after the ultimate set up with no cost concern there will be other ways to get a fraction more.
__________________
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
edc is offline   Reply With Quote
Old 01-24-2018, 06:30 PM   #8
Registered User
 
Join Date: Feb 2017
Location: CO
Posts: 942
I'm pretty sure any significant intake mods will require remapping to get anything but more volume out of the setup. Might, in fact, degrade performance. Over they years of trying all sorts of intake "airflow" mods on many cars, usually they just made more induction noise. The ONLY time there was any really change was when the mods we accompanied by a remap that adjusted for the changed A/F ratios.
Geof3 is offline   Reply With Quote
Old 01-24-2018, 06:41 PM   #9
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 2,928
how do the a/f ratios change?
The Radium King is offline   Reply With Quote
Old 01-25-2018, 12:36 AM   #10
edc
550 Anniversary
 
edc's Avatar
 
Join Date: Jul 2012
Location: Surrey, UK
Posts: 614
Garage
Quote:
Originally Posted by Geof3 View Post
I'm pretty sure any significant intake mods will require remapping to get anything but more volume out of the setup. Might, in fact, degrade performance. Over they years of trying all sorts of intake "airflow" mods on many cars, usually they just made more induction noise. The ONLY time there was any really change was when the mods we accompanied by a remap that adjusted for the changed A/F ratios.
There's another link with some Dyno results but in my case 74mm TB and larger diameter intake gave circa 5bhp. This was after the exhaust and manifolds which gave just shy of 10bhp.
edc is offline   Reply With Quote
Old 01-25-2018, 01:01 AM   #11
Registered User
 
Join Date: Feb 2017
Location: CO
Posts: 942
Quote:
Originally Posted by edc View Post
There's another link with some Dyno results but in my case 74mm TB and larger diameter intake gave circa 5bhp. This was after the exhaust and manifolds which gave just shy of 10bhp.
Is this mod currently on your car, or are your dyno results from your S?

Not saying it canít happen that some minor change can be had, but to get the most out of any intake/exhaust mod, a custom mapping should be done.
Geof3 is offline   Reply With Quote
Old 01-25-2018, 02:45 AM   #12
edc
550 Anniversary
 
edc's Avatar
 
Join Date: Jul 2012
Location: Surrey, UK
Posts: 614
Garage
It's all here Tuned/modified 2000 Boxster S

Half day remap session on the dyno after all the mods gave another circa 10bhp.
__________________
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
edc is offline   Reply With Quote
Old 01-25-2018, 06:04 AM   #13
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 2,928
Quote:
Originally Posted by Geof3 View Post
Not saying it canít happen that some minor change can be had, but to get the most out of any intake/exhaust mod, a custom mapping should be done.
why is that?
The Radium King is offline   Reply With Quote
Old 01-25-2018, 08:17 AM   #14
"50 Years of 550 Spyder"
 
10/10ths's Avatar
 
Join Date: Jun 2015
Location: The Road
Posts: 791
Itís not worth it....

...These cars do not respond well to half measures. Either build an all new engine and do EVERYTHING hi-po all at once, or leave it stock.

If you want some sound, delete the secondary cats and swap mufflers, but that is ALL you want to do.

All of these intake mods are a waste of time.
__________________
550 SE #310---"It's more fun to drive a slow car fast, than a fast car slow."
10/10ths is offline   Reply With Quote
Old 01-25-2018, 09:08 AM   #15
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 2,928
Quote:
Originally Posted by 10/10ths View Post
...These cars do not respond well to half measures. Either build an all new engine and do EVERYTHING hi-po all at once, or leave it stock.

If you want some sound, delete the secondary cats and swap mufflers, but that is ALL you want to do.

All of these intake mods are a waste of time.
good info to know.

Last edited by The Radium King; 01-25-2018 at 09:24 AM. Reason: too bad i already did all the intake mods and wasted my money ...
The Radium King is offline   Reply With Quote
Old 01-25-2018, 12:15 PM   #16
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,570
Well, maybe 10/10ths is right. However, I should have the proof of the intake mod pudding before the last snowflake falls! Watch https://youtu.be/tXx8GoTwATY for progress.

__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 11:38 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page