This Evo 9 GSR belongs baylorar. The car had the following mods:
TRE 255lph fuel pump
Ichiba 3" down pipe
Helix 3" high flow cat (200 cell)(w/ 02 bung)
RMR 3" cat-back exhaust (2 resonators)
Invidia 02 housing
PPI Ported Exhaust Manifold
PPI Ported Hotside
MUSE LICP
AEM Intake (My favorite intake)
The owner wanted a baseline which I highly recommend. Only with a baseline can we tell what power the car gained from the tune. The fact that he had a stock boost hose also helped since we did not have to simulate stock boost with an MBC, a really fuzzy method.
So how did the boost and AFR numbers look on the baseline? They were HORRIBLE. Just take a look at the before and after boost below:
The stock boost would peak at a miserable three log AVERAGE of 17.55 psi, the lowest that I have seen. PEAK boost (highest of three logs) was 18.58. The boost would taper to an AVERAGE of 13.6 psi by redline and a PEAK of 14.5 psi by redline. These are really poor boost numbers.
With the #65 pill installed and the boost tuned, I was able to extract an AVERAGE boost of 22.6 psi, a 5.05 psi increase over stock boost. PEAK boost was 23 psi at full spool up. Redline AVERAGE boost increased 5.23 psi from 13.61 psi to 18.84 psi. PEAK boost at redline was 19.93 psi. I suspect that this car has a small boost leak, probably at the throttle seals. The owner is going to do a boost leak to see if there is one.
The un-tune AFR was also rich as hell. The AEM intake tends to richen the AFR. For those who have installed an intake without a tune, I suggest you do so to take full advantage of the intake. The before and after AFR is in the chart below:
The AFR before the tune was in the 10.xx:1 ratio from full spool all the way to redline. At 7000+ the AFR fell into the 9.xx:1 range. That is really rich. I leaned the AFR by 1 full point from spool up all the way to redline. The AFR is now solidly in the 11:1 range.
Given that the car had a horrible boost profile and was pig rich, I was expecting solid gains from the tune. This car had the most power gains that I have recorded, but the car did start from a very low baseline. Here is the before and after power graph:
Baseline weather: Temp 17*C; Humidity 80%; Baro 102 kpa
Tuned Weather: Temp 18*C; Humidity 79%; Baro 102 kpa
The peak power gain was 48 hp and 54 ft-lbs of torque. But the area under the curve is where the real power is. The biggest power gain was 53 hp between 6500-7000 rpm. The biggest AVERAGE power gain was 50 hp from 5500 to 7000 rpm. The biggest torque gain 55 ft-lb from 4000 to 4500 rpm and the biggest AVERAGE torque gain was 53 ft-lbs from 3500 to 5000 rpm.
Reply With Quote
Originally Posted by PineApple
<br />"This is my evo;there are many like it,but this one is mine.My evo is my bestfriend.It is my life;I must master it like I must master my life.Without me,my evo is useless.Without my evo,I am useless.I must streetrace my evo true.I must drive straighter than my enemy who is trying to run me.I must beat him before he beats me;I WILL."<br /><br /><br />i promise im stock officer!