low dyno number and weird afr - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

aznrib · 05-27-2009, 11:03 AM

I went to the dyno a couple of days ago and my numbers were not what I would have expected. My setup is a basic sr swap with just simple bolt ons. I'm running 13 psi untuned. I have a hks actuator and a turbosmart manual boost controller. I am going to elminate the turbosmart boost controller but I did not have the time yet. Basically my first run was looking good until it hit 5000 rpm. My second graph shows my first run vs my last run and as you can see my power dropped significantly. It seems like when I hit 5k, I am running way to rich which is robbing the motor of power. I believe I should be arounds 12s after 7psi hits. I know this can probbaly be fixed if I were to get the car tuned but if there is still something broken then it would just be bandaid. Can this also cause it to bog after continuous runs? I am totally stumped. If someone can point me in the right direction, I would greatly apprciate it.

What I tried:
-replace bov
-perform boost leak test and found a leak on the core replaced IC
-changed plugs from bkr5e to bkr6e gapped to 0.28
-replaced cts
-tried 2 different MAFs
-tried 2 different o2 sensors
-no codes on ecu

My setup
sr20det /w t25 @13psi
Hybrid front mount
hks actuator
turbosmart manual boost controller
Greddy rs bow
circuit sport elbow
rsr ex-mag exhaust
ngk bkr6e gapped 0.28

05-27-2009, 11:03 AM	#1
aznrib Zilvia Member Join Date: Nov 2005 Location: Edison Posts: 248 Trader Rating: (2) Feedback Score: 2 reviews	low dyno number and weird afr I went to the dyno a couple of days ago and my numbers were not what I would have expected. My setup is a basic sr swap with just simple bolt ons. I'm running 13 psi untuned. I have a hks actuator and a turbosmart manual boost controller. I am going to elminate the turbosmart boost controller but I did not have the time yet. Basically my first run was looking good until it hit 5000 rpm. My second graph shows my first run vs my last run and as you can see my power dropped significantly. It seems like when I hit 5k, I am running way to rich which is robbing the motor of power. I believe I should be arounds 12s after 7psi hits. I know this can probbaly be fixed if I were to get the car tuned but if there is still something broken then it would just be bandaid. Can this also cause it to bog after continuous runs? I am totally stumped. If someone can point me in the right direction, I would greatly apprciate it. What I tried: -replace bov -perform boost leak test and found a leak on the core replaced IC -changed plugs from bkr5e to bkr6e gapped to 0.28 -replaced cts -tried 2 different MAFs -tried 2 different o2 sensors -no codes on ecu My setup sr20det /w t25 @13psi Hybrid front mount hks actuator turbosmart manual boost controller Greddy rs bow circuit sport elbow rsr ex-mag exhaust ngk bkr6e gapped 0.28 Last edited by aznrib; 05-27-2009 at 01:26 PM..