Cobb Access Port Tune Surging
#1
Registered User
Thread Starter
Join Date: Jan 2003
Location: Florence, Alabama
Posts: 22
Car Info: 2002 Blue Wagon
Cobb Access Port Tune Surging
I was previously running a custom tuned Xede from Vishnu until the unit failed and I lost the map. I then switched to a stage 2. I am hitting the target boost but immediately I notice that the low boxer burble was decreased with the new map. No other changes were made. I am thinking that the Copp tune does not have as much timing advance. The other unusual thing is that it pulls much harder when you get to 5000rpm and continues to pull hard to 6000 to 6500.
I have a vishnu uppipe, Turbo XS down and mid pipes with 1 high flow cat, and stromung dual tip exhaust. I am also using a vishnu underdrive pulley, K and N drop in filter and one heat range colder plugs.
Do you think its the tune or should I try something else?
Thanks
I have a vishnu uppipe, Turbo XS down and mid pipes with 1 high flow cat, and stromung dual tip exhaust. I am also using a vishnu underdrive pulley, K and N drop in filter and one heat range colder plugs.
Do you think its the tune or should I try something else?
Thanks
#2
Registered User
iTrader: (7)
Join Date: Dec 2002
Location: Sacramento CA
Posts: 10,029
Car Info: 02 Impreza WRX sedan
A custom dyno tune will almost always make more power and torque than an off-the-shelf tune. It only takes a couple of degrees less ignition advance at a certain RPM range to be able to feel the difference in torque but could be dangerous to mess around with timing without access to a wide-band O² sensor.
--
0==WW==0
"…axles of evil…" - george w. bush
--
0==WW==0
"…axles of evil…" - george w. bush
#3
Messing with the timing has nothing to do with a wideband controller. If you adjust fuel then yes, you need a wideband sensor to see how lean or rich you are running. To adjust timing, you need access to EGT and also keep an eye on KC and knock.
IMHO get the car tuned my an experienced tuner.
IMHO get the car tuned my an experienced tuner.
#4
Registered User
iTrader: (3)
Join Date: Nov 2004
Location: Green Mountain Top Above A Green Forest
Posts: 1,047
Car Info: 2005 WRX STI
To add to this. What if an advanced tuner found that the ignition advance timing is 6 to 7 degrees to low. What can be done to figure this out? I know i should be making more power but he said that he couldnt apply usual ignition timing numbers on the top end.
Any input?
Thanks guys
Any input?
Thanks guys
Thread
Thread Starter
Forum
Replies
Last Post
gruppe-s
Engine and Drivetrain
3
12-20-2006 04:33 PM
FLIWRX
Engine and Drivetrain
0
11-08-2006 12:20 PM
mrtrex
New Aftermarket Car Parts For Sale
2
06-18-2006 10:23 PM