AEM Ultimate Resource Thread>>>> - Page 43 - 3000GT/Stealth International Message Center

slava · 07-19-2005, 09:29 AM

Quote:

Originally Posted by mjannusch

Where do you have your MAP sensor connected to the intake plenum? Which MAP sensor?

You might want to try setting MAP Filter to 1 to see if that helps. It'll average the MAP sensor values over the time it takes for however many crank teeth you set it to. I use 0, with a GM 3-bar MAP connected to the small nipple on the back of the plenum by the brake booster connection and throttle body and haven't seen the "noise" that you are.

If you have your MAP sensor connected on the end of the plenum at the clutch booster connection, there tends to be more pressure fluctuation there (and generally reads higher boost as well, I've noticed).

Good idea about the FILTER settings.
I have the AEM 3.5 map connected to the small nipple close to brake booster (a couple inches from throttle). about 8" vacume line, nothing else connected to the nipple only MAP.
I looked at the frequency and it is two times slower then RPM , so it is related. My thoughts are that cyclinder intake fases drops the boost (at 5.5K the difference webween mountain and valey are 4psi !!!).
Looks like it is mechanical issue and not electrical. I wanted to try to attach longer hose to the map to try to filter air presure flactuations.

slava · 07-19-2005, 09:38 AM

anybody else have AEM 3.5 bar and example of internal log?
PC log also shows 'noise' in the load but as much because of the refresh rate.

Antwan3000 · 07-22-2005, 05:35 PM

quick question:..

i just recently got a CEL.. i pulled the code and it points to a bad O2 sensor..

if i was to have to change the O2 sensor, would it matter if i replaced it with a wideband O2 sensor instead of a stock narrowband?..

i plan on getting an AEM EMS one day down the line (actually its my next major upgrade after i finish up with my current mods), so i was wondering if i could get a headstart with this O2 sensor...

firstly, is this a good decision?.. and secondly, if i was to do this, what all would i have to consider?..

slava · 07-22-2005, 06:34 PM

Quote:

Originally Posted by Antwan3000

quick question:..

i just recently got a CEL.. i pulled the code and it points to a bad O2 sensor..

if i was to have to change the O2 sensor, would it matter if i replaced it with a wideband O2 sensor instead of a stock narrowband?..

i plan on getting an AEM EMS one day down the line (actually its my next major upgrade after i finish up with my current mods), so i was wondering if i could get a headstart with this O2 sensor...

firstly, is this a good decision?.. and secondly, if i was to do this, what all would i have to consider?..

You can replace main o2 sensor(s) with wideband, but you will need to feed 'narrow o2 signal' from the wb o2 controller to the stock ECU. i think it would make sense to buy dual WB.
The only issue i see is that main o2 sensors are before turbo and the wideband sensors are not recomended there, they have to be down the line.
Sounds like you would need to weld o2 bung(s) in order to put wb.

Antwan3000 · 07-23-2005, 10:22 AM

thx..

if i replace it soon, i'll just go with a narrowband.. but if i wait long enough, i could just change it out with a wb when i go with a full AEM setup..

Coal · 07-23-2005, 12:08 PM

I'm using the dual-channel widebands in the factory location with the narrowband outputs going to the stock ecu. No problems so far, I guess I may be decreasing the life of the sensors though.

1veryfastvr4 · 07-24-2005, 09:10 PM

just curious as to where evryone is buying there aem ems and how long it takes to get?

lethal_vr4 · 07-25-2005, 06:58 AM

I got mine from supercarengineering.com

slava · 07-25-2005, 02:16 PM

Quote:

Originally Posted by 1veryfastvr4

just curious as to where evryone is buying there aem ems and how long it takes to get?

horsepowerfreaks.com

usually they have them in stock. a couple days shipping.
I got a combo with dual wb, ait and boost solenoid + connectors, Aem 3.5 bar

slava · 07-25-2005, 02:21 PM

I think i found the fix to my MAP sensor 'noise'. RC filter solved majority of the issue.
Since my reading are more stable now i notice the AFR ration is closer to 12AFR instead of 11.5.

will i get better result tuning car (stock turbos) to 11.5 or 12.00 afr (94 octane)??

07-19-2005, 09:38 AM	#422 (permalink)
slava Forum Member Join Date: Sep 2000 Location: Harrisburg Trader Rating: (1)	Re: AEM Ultimate Resource Thread>>>> anybody else have AEM 3.5 bar and example of internal log? PC log also shows 'noise' in the load but as much because of the refresh rate.

07-22-2005, 05:35 PM	#423 (permalink)
Antwan3000 aka "3000" Join Date: Nov 2004 Location: Memphis, TN Drives: '92 Stealth R/T TT Trader Rating: (1)	Re: AEM Ultimate Resource Thread>>>> quick question:.. i just recently got a CEL.. i pulled the code and it points to a bad O2 sensor.. if i was to have to change the O2 sensor, would it matter if i replaced it with a wideband O2 sensor instead of a stock narrowband?.. i plan on getting an AEM EMS one day down the line (actually its my next major upgrade after i finish up with my current mods), so i was wondering if i could get a headstart with this O2 sensor... firstly, is this a good decision?.. and secondly, if i was to do this, what all would i have to consider?.. __________________ 1992 Dodge Stealth R/T Twin Turbo Current Mods- Intake: Dejon Tool dual intake pipes (no MAF), DNP FMIC and hardpipes, TurboXS Type H-RFL BOV, krank vents Exhaust: 3SX custom DP, Random Technology UHF cat, Borla catback exhaust Wheels and Tires/Drivetrain:18" Volk Racing TE-37s (white), Kumho Ecsta Supra 712s, SPEC Stage III+ clutch, stainless steel clutch slave line, Fidanza lightweight flywheel, PST 1-piece CFDS, Ultimate Performance short-throw shifter Ignition: NGK plugs, Magnecor KV85 8.5mm wires, Optima Redtop Fuel: Denso 720ccs, hotwired Denso supra fuel pump, AEM adjustable FPR Control: Greddy Emanage Ultimate, AEM UEGO WB O2s, AEM TRU-BOOST controller, Blitz DTT DCII Cosmetics: viper blue pearl metallic paint with custom viper white racing stripes, Cianci fiberglass triple-guage pod, AEM WB O2 gauge, AEM TRU-BOOST gauge, AEM oil pressure gauge, black/blue interior design, Corbeau CR-1 racing seats and belts, Momo steering wheel, Momo shift knob, Momo shifter boot, Momo racing pedals, Blue StreetGlows Sound: all Sony Xplod speakers with two 10" Xplod subs in a custom box Next Mod(s): Phantom turbos, DNP precats, 3SX lightweight crankpully, NX kit..

07-23-2005, 10:22 AM	#425 (permalink)
Antwan3000 aka "3000" Join Date: Nov 2004 Location: Memphis, TN Drives: '92 Stealth R/T TT Trader Rating: (1)	Re: AEM Ultimate Resource Thread>>>> thx.. if i replace it soon, i'll just go with a narrowband.. but if i wait long enough, i could just change it out with a wb when i go with a full AEM setup..

07-23-2005, 12:08 PM	#426 (permalink)
Coal Canadian Speed Junky Join Date: Apr 2004 Location: Vancouver Island, BC Drives: '92 Dodge Stealth TT Trader Rating: (9)	Re: AEM Ultimate Resource Thread>>>> I'm using the dual-channel widebands in the factory location with the narrowband outputs going to the stock ecu. No problems so far, I guess I may be decreasing the life of the sensors though. __________________ ET: 13.29

07-24-2005, 09:10 PM	#427 (permalink)
1veryfastvr4 TPW: Promoter Join Date: Jan 2005 Location: boring ohio Drives: 97 vr4 Trader Rating: (58)	Re: AEM Ultimate Resource Thread>>>> just curious as to where evryone is buying there aem ems and how long it takes to get?

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07-25-2005, 06:58 AM	#428 (permalink)
lethal_vr4 NG '03 6th Floor Crew Join Date: Oct 2001 Drives: 92 VR4/ 01 Lightning Trader Rating: (58)	Re: AEM Ultimate Resource Thread>>>> I got mine from supercarengineering.com __________________ Web log: http://apps.blackflagracing.com/Blog/ The Armada '93 Sandstone Gray 3000GT VR-4 2006 3SI Ride of the Year 2007 All Mitsu Cookout, 1st Place 1st Gen 3/S 2008 All Mitsu Cookout, 1st Place 1st Gen 3/S '92 Fiji Blue 3000GT VR-4 2004 All Mitsu Cookout, 1st Place 1st Gen 3/S 2005 NG Quick 8 AWD Unlimited 1/4 Mile Qualifier. BLACK FLAG RACING '92 Emerald Green Pearl Stealth RT/TT 3.5L, 15Gs, AEM EMS For Sale

07-25-2005, 02:21 PM	#430 (permalink)
slava Forum Member Join Date: Sep 2000 Location: Harrisburg Trader Rating: (1)	Re: AEM Ultimate Resource Thread>>>> I think i found the fix to my MAP sensor 'noise'. RC filter solved majority of the issue. Since my reading are more stable now i notice the AFR ration is closer to 12AFR instead of 11.5. will i get better result tuning car (stock turbos) to 11.5 or 12.00 afr (94 octane)??