leaning out under boost..

[twenty5psi]

alright im leaning out under boost..it dosnt happen until i start to make some boost..im running around 14 lbs of boost with my big16g and 660 injectors,255 lph and safc..is my safc set wrong?..i mean im leaning out to the point where the o2 meter will just shut off..itll go from very very lean to no lights at all under boost..havnt hooked up the egt gauge yet so im not boosting much but what should i change on my safc..ive never tuned one before and i dont think i need to tune it all over again from zero but i just need to add alittle fuel and its kinda confusing..what should i do?..i dont want to detonate the engine so im kinda reframing myself from screwing around with it for right now..any suggestions?..

 

[FastRthenU]

Right now your shitting on a hornets nest, with how your tuning. But I have been able to tune with just using one of the air/fuel gauge, and my butt dyno. If your gauge is hooked up properly, and your O2 sensor is working properly. Then yes you are leaning right out under boost. All that gauge is good for is a warning light. Right now its tyrin to warn you. From the Rpms that you start to build boost. Start to richen it up through the higher rpm range. I dont really recomend tuning this way but if you half to do it. Then go for it. You have more then enough fuel for your setup. You just need it tuned right. Good luck, and go buy yourself a logger.

 

[twenty5psi]

Originally posted by FastRthenU
Right now your shitting on a hornets nest, with how your tuning. But I have been able to tune with just using one of the air/fuel gauge, and my butt dyno. If your gauge is hooked up properly, and your O2 sensor is working properly. Then yes you are leaning right out under boost. All that gauge is good for is a warning light. Right now its tyrin to warn you. From the Rpms that you start to build boost. Start to richen it up through the higher rpm range. I dont really recomend tuning this way but if you half to do it. Then go for it. You have more then enough fuel for your setup. You just need it tuned right. Good luck, and go buy yourself a logger.

yes a logger is one of my top priorities right now along with getting my fmic hooked up..i bought the aqaumist injection kit and a egt gauge so i should be able to keep the heat down alittle from the kit and ill be able to monitor it better..i know the o2 gauge isnt anything to tune with but if its leaning out under boost like it says then i think thats a warning sign but ill be able to tune it alittle better once i get the gauge and kit installed..thanx for your help bro
chris

 

[kpt4321]

Your lucky you haven't blown your car up yet (if you haven't).

Get a logger. I don't know what you were thinking when you installed bigass injectors without one....

What is your SAFC set at?

....Kyle T.
93 TSi AWD "TURBO4"
14b - 12.8 @ 108

 

[Mike 99GSX]

At only 14psi and with 660s you could be running so rich that your o2 A/F gauge isn't registering. You definately need the logger!!!

 

[twenty5psi]

Originally posted by kpt4321
Your lucky you haven't blown your car up yet (if you haven't).

Get a logger. I don't know what you were thinking when you installed bigass injectors without one....

What is your SAFC set at?

....Kyle T.
93 TSi AWD "TURBO4"
14b - 12.8 @ 108

no the car had the injectors in it when i bought it..im just going to start to add alittle fuel to the rpm range where i start to boost at but slowly..the egt gauge and aqaumist will be in the car this weekend..until then the boost is only at like 12-13 and im not punching it from light to light so i think ill be fine for now until i buy a logger..thanx guys..

 

[kpt4321]

What is your SAFC set at right now.

 

[twenty5psi]

Originally posted by kpt4321
What is your SAFC set at right now.

its set as is..

lo 25%
hi 50%
NE 1 1k rpm
NE 2 2K RPM
NE 3 3K RPM
NE 4 4K RPM
NE 5 5K RPM
NE 6 6K RPM
NE 7 7K RPM
NE 8 8K RPM

lo 4k rpm -47%
hi 4K rpm -20%

NE 1 10.0%
NE 2 10.0%

thats all i could find on there..is there anything you would suggest?..
again this was tuned like this when i bought the car..thanx
chris