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

Reply
 
LinkBack Thread Tools Display Modes
Old 09-30-2015, 02:13 PM   #1
Registered User
 
Join Date: Mar 2012
Location: Arizona
Posts: 711
Programmable Standalone ECU

Hey guys,
The bench flash I have on my 3.8 is great and all, but I want a programmable one. Any ideas?

I have a 1999 2.5L base Boxster with a 3.8 M96 motor.

__________________
Porsche Boxster 986 3.8
Toyota Corolla AE86 F20C
Mazda Miata NA8C
Crono0001 is offline   Reply With Quote
Old 09-30-2015, 05:23 PM   #2
Registered User
 
Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,315
are you looking for something like Megasquirt..?
Gilles is offline   Reply With Quote
Old 09-30-2015, 06:31 PM   #3
Registered User
 
Join Date: Oct 2008
Location: Gilbert, AZ
Posts: 266
This will sort of open up a can of worms for a street car. For starters, you'll have to figure out a way to pass emissions in AZ. There will need to be some integration with the rest of the chassis in order for everything to work correctly like it did before. Not that it can't be done, but it's something to consider. The fact that it's a 2.5 chassis makes things a lot easier than an earlier car because there is almost no CAN integration. If your car has cruise control, you would lose that feature, and you would have to do a few things to make the AC work correctly, but it's nothing I haven't done before. It honestly wouldn't be too difficult, just a bit of an investment to do it correctly. For what you need to do, an AEM Infinity 8 would get the job done. It's pretty good hardware for the money, and very capable.

Is this something you are wanting to tackle yourself, or would you be having a shop do the work?

If a plug and play solution is what you're looking for, there isn't one.
kcpaz is offline   Reply With Quote
Old 10-01-2015, 09:21 AM   #4
Registered User
 
Join Date: Mar 2012
Location: Arizona
Posts: 711
Passing emissions in AZ isn't a problem.
Both AC and Cruise Control work with my current bench flash. I don't care so much about cruise control, but AC is a must in AZ.

Ideally, I would want a shop to dyno and tune my car as well. The car runs extremely rich currently.
__________________
Porsche Boxster 986 3.8
Toyota Corolla AE86 F20C
Mazda Miata NA8C
Crono0001 is offline   Reply With Quote
Old 10-12-2015, 06:11 PM   #5
Registered User
 
Join Date: May 2014
Location: S.California
Posts: 2,012
I like your stand-alone ECU project .Would it not be easier to resolve the rich running problem ? If that is the only problem,it may be easier to solve/hack than a stand-alone ECU?
For example, could it be as simple as using different injectors and using the correct air filter? Or just getting the injectors cleaned and maintained - easy diy job.
Gelbster is offline   Reply With Quote
Old 10-12-2015, 06:19 PM   #6
Registered User
 
Top_Ramen's Avatar
AEM EMS? Have a couple friends that use it but unfortunately they're not Porscches
__________________
'99 Porsche Boxster 986 - weekend car
'04 BMW 645ci e63 - daily driver
'98 BMW 528i e39 - dog carrier

Top_Ramen is offline   Reply With Quote
Old 10-19-2015, 11:16 AM   #7
Registered User
 
Join Date: Dec 2011
Location: SLC
Posts: 142
Quote:
Passing emissions in AZ isn't a problem.
Stand alone ecus do not have OBD2 integration. You may be able to pass a sniffer type test but a 96 or newer vehicle needs to have a properly functioning OBD2 interface.

Off road use only.
MaxD is offline   Reply With Quote
Old 10-19-2015, 11:51 AM   #8
Registered User
 
Join Date: Jun 2014
Location: LB, Germany
Posts: 1,350
Hi Crono0001,

check this: https://shop.vems.hu/catalog/vems-p-48.html

Fully programmable and can be individualized to your needs.

Regards
Markus
Smallblock454 is offline   Reply With Quote
Old 10-19-2015, 12:14 PM   #9
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 2,987
if you kept stock computers then you have a 5.2.2 dme - same as a 1999 996 3.4. get a shop with a pst2 to push a 996 flash on your car (get a row 996 flash to avoid issues with catless exhaust). that'll have you in the right ballpark. even with a .4 displacement difference, the ecu should be able to keep you running at stoich in low load situations without hitting the trim limits, and keep you a about where you want to be at WOT provided you are metering air properly - if you have a pst2 or durametric check your rkats and fras to make sure fuel trims are ok.

once you have the dme fueling you properly you can try an aem unit. they intercept the maf signal and send 'massaged' info to the computer. the computer will still use the o2 sensors to trim fueling to stioch at low load, but the aem unit will allow you to lean things out a bit at wot - more power, better fuel consumption. if you are feeling really ballsy, note that the aem unit is just a really expensive variable resistor, so try putting a variable resistor in there instead - some searching on the net should get you all the info you need.

The Radium King 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 02:42 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