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

Reply
 
LinkBack Thread Tools Display Modes
Old 09-25-2013, 12:27 PM   #1
Registered User
 
Join Date: Jun 2013
Location: canada
Posts: 289
another 996 plenum and tb question

Ok guys,

i have another question regarding the 996 plenum and tb question

i currently have a 996 c4 3.6l 996 plenum and tb in my shop.

current size is 74mm,

is it a direct bolt-on to a stock 3.2l motor?

or i need to buy reducers hoses?

would you invest more and go to a 76mm size?

im currently running straight pipe, except i still have the stock headers(cats)

has anyone been running a bigger straight pipe system?

i cant remember the size of the stock piping but, would there be any benefice to go to 1.5in instead of 1in? numbers for reference only

thanks
Paseb is offline   Reply With Quote
Old 09-25-2013, 12:59 PM   #2
edc
550 Anniversary
 
edc's Avatar
 
Join Date: Jul 2012
Location: Surrey, UK
Posts: 576
Garage
You can stretch your rubber hose couplers over and they provide a better fit than the reducers I tried. I used 83mm from MAF to TB. http://www.boxa.net/forum/index.php?showtopic=53075&page=9
__________________
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

Last edited by edc; 09-25-2013 at 01:01 PM.
edc is offline   Reply With Quote
Old 09-25-2013, 01:10 PM   #3
Registered User
 
BYprodriver's Avatar
 
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,166
Garage
Boxster T/B = 68mm

996 C2 T/B = 74,75,76mm depending on who is measuring.

996GT3 T/B = 83mm

Boxster muffler inlet = 1.5" so that should be your pipe size.
BYprodriver is offline   Reply With Quote
Old 09-26-2013, 05:36 AM   #4
Registered User
 
Join Date: Jun 2013
Location: canada
Posts: 289
thanks guys,
so i will just go with the 996 c2 plenum and tb

can i increase the size piping to 1 3/4" or even 2" ? would it gives any power gains? or i just leave the stock piping at 1.5" and only upgrade to 996 plenum and tb ?
Paseb is offline   Reply With Quote
Old 09-26-2013, 08:44 AM   #5
Registered User
 
BYprodriver's Avatar
 
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,166
Garage
Quote:
Originally Posted by Paseb View Post
thanks guys,
so i will just go with the 996 c2 plenum and tb

can i increase the size piping to 1 3/4" or even 2" ? would it gives any power gains? or i just leave the stock piping at 1.5" and only upgrade to 996 plenum and tb ?
You always work on the weakest link. If your muffler inlet is 1.5" there is no need to go bigger upstream. To my knowledge Fabspeed is the only muffler with a bigger inlet (2") & they include the secondary pipes (2")
BYprodriver is offline   Reply With Quote
Old 09-27-2013, 04:07 AM   #6
Registered User
 
Join Date: Jun 2013
Location: canada
Posts: 289
why not putting a bigger exhaust size?

you had more air to the engine

im still using the stock headers with cats, but after that, im straight pipe.

from the 3 bolts flanges, i would run a bigger straight pipe ie 2'' instead on the stock piping size

????
Paseb 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 08:18 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