mystery drop in AF??? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sr20tom · 07-17-2006, 08:44 AM

The car was runnig fine at 18psi with the AF at 11.4-11.5 and now all of a sudden its leaning out to 12.0-12.2. What could cause this. Could it be the 100 degree weather or something else. There are almost brand new Apex'i 550cc injectors so i doubt that they are going bad.

slider2828 · 07-18-2006, 02:03 PM

Damn dude hahaha running at 18PSI sounds like you getting hang of that profec. Anyways to your answer, yes that is definitely a factor. Ambient temperature obviously makes a huge difference in AF. You can test this by trying to drive it at early in the morning or late at night when temps comes down and then test it against boosting in the afternoon.

07-17-2006, 08:44 AM	#1
sr20tom Leaky Injector Join Date: Dec 2004 Location: Queens Posts: 147 Trader Rating: (0) Feedback Score: 0 reviews	mystery drop in AF??? The car was runnig fine at 18psi with the AF at 11.4-11.5 and now all of a sudden its leaning out to 12.0-12.2. What could cause this. Could it be the 100 degree weather or something else. There are almost brand new Apex'i 550cc injectors so i doubt that they are going bad. __________________ 91 SRtweezy powered sil-80

07-18-2006, 02:03 PM	#2
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	Damn dude hahaha running at 18PSI sounds like you getting hang of that profec. Anyways to your answer, yes that is definitely a factor. Ambient temperature obviously makes a huge difference in AF. You can test this by trying to drive it at early in the morning or late at night when temps comes down and then test it against boosting in the afternoon.