Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 05-15-2017, 10:38 AM   #1
Custom User Title Here
 
particlewave's Avatar
 
Join Date: Mar 2012
Location: WA
Posts: 6,087
Garage
..........

..........


Last edited by particlewave; 09-27-2019 at 11:57 PM.
particlewave is offline   Reply With Quote
Old 05-15-2017, 12:35 PM   #2
Registered User
 
Join Date: Sep 2016
Location: NoVa
Posts: 67
Garage
What's the cost? Is there a performance benefit from no SAI? I keep reading about the SAI headaches so getting rid of it could be a good thing.
alex.rhodes is offline   Reply With Quote
Old 05-15-2017, 12:46 PM   #3
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,665
PW, that looks like a nice bit of kit! Well done. SAI codes can be a real PITA.


Quote:
Originally Posted by alex.rhodes View Post
Is there a performance benefit from no SAI?
No. The secondary air injection system only operates for about 90 seconds at start up to reduce cold engine emissions (so your car might pollute more but it won't have more or less power).
__________________
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
thstone is offline   Reply With Quote
Old 05-15-2017, 01:06 PM   #4
Registered User
 
Join Date: May 2014
Location: S.California
Posts: 2,012
Quote:
Originally Posted by alex.rhodes View Post
What's the cost? Is there a performance benefit from no SAI? I keep reading about the SAI headaches so getting rid of it could be a good thing.
Alex,
If this works s I hope it will permit complete removal of the entire SAI system.The entry ports for SAI air on top of each cylinder head could be blocked off with plates.This is what the Track guys do.
Previously there was a big penalty for doing this to road cars in California-The CEL would illuminate & it would fail the Smog Test and get you into hellish conflict with the Authorities.The Ready Status would also be a Smog failure.
Hopefully this hack would not trigger a CEL nor would it produce A "Ready Status " failure.
To pass the Visual Test as part of the Ca Smog Test, you could leave the SAI pump and visible hose in place. Just disconnect it electrically.
You would still need the crack-prone Vacuum Acumulator and it's brittle vac hoses for other vacuum controlled functions other than the SAI.
I am just learning about this new part so please do not rely on my optimism - yet.
Gelbster is offline   Reply With Quote
Old 05-15-2017, 02:11 PM   #5
Registered User
 
Join Date: Apr 2011
Location: Massachusetts
Posts: 33
I'll buy one.

Please put me in line.

email directly at.

f a v e r y m i at yahoo dot com

Thank you
faverymi is offline   Reply With Quote
Old 05-15-2017, 02:51 PM   #6
Motorist & Coffee Drinker
 
78F350's Avatar
 
Join Date: Jul 2014
Location: Oklahoma
Posts: 2,736
Garage
I'm interested. I keep telling myself I'll fix my '01's SAI next week (for about a year). I'd rather just cap off the vacuum.
__________________
I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.
78F350 is offline   Reply With Quote
Old 05-15-2017, 03:41 PM   #7
Registered User
 
Dave80GTSi's Avatar
 
Join Date: Sep 2016
Location: Central Ohio
Posts: 351
While you are at it ...

I applaud your efforts here, but what would -really- be a nice build would be a similar module which would emulate the signal from the post-cat oxygen sensor.

Thus allowing us to use aftermarket non-cat headers without the lack of a cat triggering the CEL due to the improper signal from the secondary oxygen sensor.

How complicated would this sort of thingy be to construct?

Cheers - DM
__________________
2000 Ocean Blue Boxster S
1980 Ferrari 308 GTSi
2019 Alfa Romeo Giulia Ti Sport AWD
Dave80GTSi is offline   Reply With Quote
Old 05-15-2017, 04:03 PM   #8
Registered User
 
Join Date: Jul 2005
Location: MA
Posts: 806
I'm in for sure
__________________
98 Arena Red 986
Stroked & Blown is offline   Reply With Quote
Old 05-15-2017, 04:42 PM   #9
98 Arctic silver 986
 
tommy583's Avatar
 
Join Date: Jul 2011
Location: Upstate, NY
Posts: 1,313
Garage
Yes....yes I am.
tommy583 is offline   Reply With Quote
Old 05-15-2017, 04:44 PM   #10
Beginner
 
Jamesp's Avatar
 
Join Date: Mar 2013
Location: Houston
Posts: 1,659
Garage
Quote:
Originally Posted by Dave80GTSi View Post
I applaud your efforts here, but what would -really- be a nice build would be a similar module which would emulate the signal from the post-cat oxygen sensor.

Thus allowing us to use aftermarket non-cat headers without the lack of a cat triggering the CEL due to the improper signal from the secondary oxygen sensor.

How complicated would this sort of thingy be to construct?

Cheers - DM
I think you just need a 600mv constant voltage power supply while the car is running hooked to the O2 leads, and a resistor to make the car think the heaters are working. For me that would be super complicated to build, for P-wave, well if he's reading this, he's already designed it.
__________________
2003 S manual
Jamesp is offline   Reply With Quote
Old 05-15-2017, 04:47 PM   #11
Beginner
 
Jamesp's Avatar
 
Join Date: Mar 2013
Location: Houston
Posts: 1,659
Garage
And one more item, What are the SAI delete circuits going to run? I now consider myself an SAI surgeon after diagnosing and fixing mine, now I want to be an SAI ninja and chop the damned things head off.
__________________
2003 S manual
Jamesp is offline   Reply With Quote
Old 05-15-2017, 05:02 PM   #12
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,665
Quote:
Originally Posted by Gelbster View Post
The entry ports for SAI air on top of each cylinder head could be blocked off with plates.This is what the Track guys do.
Here are the PN's for the blocking plates and gaskets:

__________________
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
thstone is offline   Reply With Quote
Old 05-15-2017, 05:04 PM   #13
Custom User Title Here
 
particlewave's Avatar
 
Join Date: Mar 2012
Location: WA
Posts: 6,087
Garage
..........

Last edited by particlewave; 09-03-2018 at 10:58 AM.
particlewave is offline   Reply With Quote
Old 05-15-2017, 05:53 PM   #14
Beginner
 
Jamesp's Avatar
 
Join Date: Mar 2013
Location: Houston
Posts: 1,659
Garage
Quote:
Originally Posted by particlewave View Post
I'm not looking to make a profit...
Make a profit, otherwise you'll starve. If that happens we don't get your follow on secondary O2 delete circuit.
__________________
2003 S manual
Jamesp is offline   Reply With Quote
Old 05-15-2017, 05:56 PM   #15
Registered User
 
Join Date: Jul 2005
Location: MA
Posts: 806
Thanks, Tom - I've been looking for those part numbers.
__________________
98 Arena Red 986
Stroked & Blown is offline   Reply With Quote
Old 05-15-2017, 05:57 PM   #16
Registered User
 
steved0x's Avatar
 
Join Date: Dec 2012
Location: FL
Posts: 4,073
Please put me in line for one at $60 or even a little higher.
steved0x is offline   Reply With Quote
Old 05-15-2017, 07:44 PM   #17
Registered User
 
Join Date: May 2014
Location: S.California
Posts: 2,012
For the late arrivals to this Thread, please note the first item we discussed is a SAI bypass hack. Later there is discussion about a post-cat O2 sensor emulator . Two totally different products. Both helpful but 2 different products.I hope this helps.

Last edited by Gelbster; 05-15-2017 at 08:05 PM.
Gelbster is offline   Reply With Quote
Old 05-15-2017, 08:44 PM   #18
Registered User
 
Join Date: Aug 2016
Location: Illinois
Posts: 26
I'd like to buy the SAI bypass hack.

Perry
PR61 is offline   Reply With Quote
Old 05-15-2017, 10:11 PM   #19
Custom User Title Here
 
particlewave's Avatar
 
Join Date: Mar 2012
Location: WA
Posts: 6,087
Garage
..........

Last edited by particlewave; 09-27-2019 at 11:58 PM.
particlewave is offline   Reply With Quote
Old 05-16-2017, 05:22 AM   #20
Rennzenn
 
j.fro's Avatar
 
Join Date: Feb 2005
Location: Virginia
Posts: 1,359
Garage
I'd like to be in for this as well. PW, thanks for finding a solution!

__________________
Rennzenn
Jfro@rennzenn.com
j.fro 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 11:11 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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