Search | Car Forums | Gallery | Articles | Helper | AF 350Z | IgorSushko.com | Corporate |
| Latest | 0 Rplys |
|
Eclipse Problem Diagnosis Got a problem you can't fix? Post here and one of our members will answer as soon as possible. |
Show Printable Version | Email this Page | Subscribe to this Thread |
|
Thread Tools |
10-12-2004, 11:22 PM | #1 | |
AF Newbie
Join Date: Oct 2004
Location: Las Vegas, Nevada
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
|
My first log
My car lost 20 horsepower to the wheels when I dynoed it. On 15 pounds of boost it made 276 horsepower to the wheels. When I turned my boost up to 17 pound my car mad 256 horsepower to the wheels. (For those of you that didn't know)
Can someone please help me point out my problem please!!!!!! This log is on 10 pounds of boost with a garret 60 trim turbo, 660cc Injectors, 255 High Pressure Walbro Fuel Pump, stock Fuel Pressure Regulator, and the only thing I have to tune with is a SAFC II and a Datalogger. AND I WAS GOING 100% FULL THROTTLE ON THIS LOG: RPM Timing O2 1 Bank 1 2816----29------0.22 2968----28------0.88 3168----27------0.9 3336----27------0.9 3548----26------0.9 3776----22------0.9 4036----22------0.9 4288----22------0.9 4548----21------0.9 4816----21------0.9 5082----22------0.92 5352----21------0.92 5612----22------0.92 5852----23------0.92 6112----23------0.92 6336----24------0.92 6564----26------0.92 6772----27------0.92 6968----27------0.92 7136----26------0.92 My High Throttle on my SAFC are: RPM Fuel Delivery 800 -36% 1400 -36% 2000 -30% 2600 -30% 3200 -30% 3800 -30% 4400 -30% 5000 -30% 5600 -32% 6200 -32% 6800 -32% 7400 -30% My Throttle Position Points are 20 percent for low throttle and 50 percent for high throttle. Can someone tell me where to richen or lean my car at. Please tell me at what rpm range and how much percent should I take off or put on on my fuel delivery. THANK YOU IN ADVANCE.
__________________
|
|
10-12-2004, 11:54 PM | #2 | |
Massive Genius
|
Your timing is whacked. I've never seen a timing curve shifted that high before. Also when you were on the dyno, did they hook up the wideband, that would be very beneficial.
As another point of advice, if your pump is a 255 HP you will need to switch to an aftermarket regulator. FPR overrun makes accurate tuning nearly impossible. As far as leaning or richening out, with a timing curve like that, its hard to say what you need to do without accurate AFR data. Sorry this isn't much help -Jacob
__________________
"this is a funnie thread.. we have a poser who keeps posting information that doesn't fit together.. and aves911 keeps correcting him" |
|
10-13-2004, 07:29 AM | #3 | ||
AF Enthusiast
Join Date: Mar 2004
Location: Camp Hill, Pennsylvania
Posts: 1,634
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: My first log
Quote:
That's a new one. As far as the SAFC goes, most people recommend that the Lo throttle point be 30% and the high throttle point be 80%. But it's entirely up to you.
__________________
1997 Spyder GS-T 5-Speed EVO III 16g, DSMLink, Walboro 190 lph Fuel Pump, FIC 650cc injectors, CoolingMist 150psi Methanol Injection, Greddy EVO 2 Cat Back, 2.5" Extreme DP, 2.5" Extreme Hi-Flow Cat, Injen intake, HyperDrive C1 Street Disk & PP, HyperDrive Lightweight Flywheel, 1g BOV, RRE UICP, Home Depot MBC, AEM UEGO WBO2, Brembo Slotted rotors, Akebono Ceramic Pads |
||
10-13-2004, 07:45 PM | #4 | |
AF - Advisor
Join Date: Jun 2003
Posts: 6,342
Thanks: 0
Thanked 2 Times in 2 Posts
|
Re: My first log
The correction factors are on the rich side for 660s, and based on your excessive timing I would leave it that way. This is what I am always talking about, the AFC adjsuts AFR and timing at the same time. Its a pain in the ass. Showing the ECU 30% less air than you are really flowing moves you further down on the load maps, raising timing. I think timing is right on for what I Would expect to see with 660s and 10 psi.
The only way to get out of this rut is to raise airflow (boost). Once over 2.1 g/rev the ECU is on its highest load map and peak timing is only 16-17 degrees (this is for 2g). So if you are 30% over 2.1 g/rev, even with the 30% correction you will still get "stock" timing. So as you raise boost and airflow timing will NATURALLY drop. Most people interpret this as knock THe trouble is the space in between. As you are raising airflow but not enough to get over 2.1 g/rev, you are stuck with high airflow AND high timing. So you may get knock "in between." What I Would do is leave your settings where they are (they are still conservative), add in some race gas (for protection in case things go wrong) and try 20 psi and see what that gives you for both airflow and timing. If timing is high teens or low 20s, you should be able to sagely switch back to pump gas. Just log it right away to see that timing doesnt shift much. In fact, if you can post airflow in your current state of tune that will help me determine what the ECU is trying to do. There is a pretty good thread on all this elsewhere on the site, from about 2 weeks ago. See if that info helps as well.
__________________
Kevin Jewer RWD Talon - 7.92 at 180 Mightymax - 10.7 at 125 |
|
10-13-2004, 11:44 PM | #5 | ||
AF Newbie
Thread starter
Join Date: Oct 2004
Location: Las Vegas, Nevada
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: My first log
Quote:
__________________
|
||
10-14-2004, 12:31 AM | #6 | ||
AF Newbie
Thread starter
Join Date: Oct 2004
Location: Las Vegas, Nevada
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: Re: My first log
Quote:
__________________
|
||
10-14-2004, 01:12 AM | #7 | |
Massive Genius
|
Kevin,
You're way to used to posting in the DSMLink forums. For the guys using only an SAFC, lb/min airflow and g/rev don't really mean much g/rev is the mass of air per revolution consumed by the engine, its one of the factorys the ECU uses to determine the appropriate fuel and timing maps to use. Like Kevin said, pulling 30% out with the AFC and then only running 10lbs, the ECU is almost on a cruise map! Your best bet is like Kevin said, up the boost CAREFULLY until you can start flowing enough air to get the ECU to run the maximum airflow timing and fuel maps. You can check your plugs to see the condition they are in to see if they need to be replaced. A suction or whistling noise is normal through metal IC pipes, but it might be in your best interest to do a boost leak test to see if you have any leaks. With a 60 Trim you can get away with running boost around 20psi without damaging anything, if you are tentive when tuning. I.e. watch your EGT gauge, make sure things don't get too hot, ect. -Jacob
__________________
"this is a funnie thread.. we have a poser who keeps posting information that doesn't fit together.. and aves911 keeps correcting him" |
|
10-14-2004, 01:32 AM | #8 | ||
AF Newbie
Thread starter
Join Date: Oct 2004
Location: Las Vegas, Nevada
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: My first log
Quote:
__________________
|
||
10-14-2004, 08:01 AM | #9 | |
AF Enthusiast
Join Date: Mar 2004
Location: Camp Hill, Pennsylvania
Posts: 1,634
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: My first log
If I remember correctly, the air intake temperature is measured before the turbo & intercooler. So you shouldn't see a difference in intake temps by uping the boost. All I know is that over 84 or 85 degrees the ECU pulls 1 degree of timing.
__________________
1997 Spyder GS-T 5-Speed EVO III 16g, DSMLink, Walboro 190 lph Fuel Pump, FIC 650cc injectors, CoolingMist 150psi Methanol Injection, Greddy EVO 2 Cat Back, 2.5" Extreme DP, 2.5" Extreme Hi-Flow Cat, Injen intake, HyperDrive C1 Street Disk & PP, HyperDrive Lightweight Flywheel, 1g BOV, RRE UICP, Home Depot MBC, AEM UEGO WBO2, Brembo Slotted rotors, Akebono Ceramic Pads |
|
10-14-2004, 09:19 AM | #10 | |
AF - Advisor
Join Date: Jun 2003
Posts: 6,342
Thanks: 0
Thanked 2 Times in 2 Posts
|
Re: My first log
Thanks for cleaing up aves, I am a little too comfortable with this stuff sometimes
Sounds to me like you have a boost leak. Any further discussion is useless until that is fixed. That could EASILY be the source of the drop in power. Raising boost with a big boost leak makes things progressively richer (less power). Take care of that first.
__________________
Kevin Jewer RWD Talon - 7.92 at 180 Mightymax - 10.7 at 125 |
|
10-14-2004, 01:47 PM | #11 | ||
AF Newbie
Thread starter
Join Date: Oct 2004
Location: Las Vegas, Nevada
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: Re: My first log
Quote:
__________________
|
||
10-14-2004, 09:59 PM | #12 | |
AF - Advisor
Join Date: Jun 2003
Posts: 6,342
Thanks: 0
Thanked 2 Times in 2 Posts
|
Re: My first log
Not at all! The turbo will simply flow more to make up the lost air to maintain boost. Thats how it works when you have closed loop (feedback) boost control. Only if you excede the flow limits of the turbo will boost actually drop. Always do boost leak tests.
__________________
Kevin Jewer RWD Talon - 7.92 at 180 Mightymax - 10.7 at 125 |
|
|
POST REPLY TO THIS THREAD |
|
|