Looney Tuning
12-06-2009, 01:39 AM
I have not posted much lately since most of the cars that I have been tuning are similar to ones that I have posted about, making the posts redundant. But this one is different. This is the first Looney Tuned 2010 Evo X and it does have a slight difference in the stock rom than the 2008 Evo X, so I thought it is proper to post about it. This Evo X had the following mods:
AEM Intake
Nisei 1PC Upper IC Pipe
Test Pipe
The target AFR, timing, and boost in the 2010 rom is the same as those in the factory reflash 2008 rom. The main difference between the two is that Mitsu decided to enable lean spool in the 2010 rom. Once lean spool is enabled the logged wideband AFRs become leaner even though both the 2008 and the 2010 roms use the same target fuel maps. The thing that I do not understand is why didn’t Mitsu enable lean spool on the 2008 Evo X. Did they forget?
Check out the AFR on these cars vs. the AFR on this 2010 Evo X. Note how the AFR dips into the 9:1 ratio on the 2008 Evo X while the 2010 Evo X has a semi-decent stock AFR.
http://www.sr20deracing.com/looneytuning/Evo/Roy/afr_08_10.gif
You might object that the second car has more mods and that is leaning things out more. So here is another 2008 Evo X with more mods vs. the 2010 Evo X. You will note the same rich 9:1 AFR on the 2008 Evo X vs. the 11:1 to 10.4:1 AFR on the 2010 Evo X.
http://www.sr20deracing.com/looneytuning/Evo/Roy/afr_08_10-2.gif
The stock boost between the 2008 Evo X and the 2010 Evo X did not change much. Here is the before and after boost profile on this 2010 Evo X:
http://www.sr20deracing.com/looneytuning/Evo/Roy/psi_b4_after.gif
The stock boost was typical of an Evo X with an AEM intake/UICP/TP. Boost peaked at 4000 hitting 23.30 psi. Boost then tapered all the way to 14.90 psi by redline. The tuned boost was much better, hitting peak 500 rpm sooner at 25.96 psi and tapering to only 18.94 psi by redline. The tuned boost was 2.66 psi higher than stock at peak and 4.04 psi higher than stock by redline.
Since enabling lean spool already leaned out the AFR, I did not have to change the AFR much. It was a far cry from high target AFRs that a tuner has to enter in a 2008 fuel map. Here is the before and after AFR on this car:
http://www.sr20deracing.com/looneytuning/Evo/Roy/afr_b4_after.gif
I simply leaned out the AFR to get it solidly into the mid 11:1 ratio and then tapered it t6o 11:1 by redline. Above 7000, I dropped it to 10.6:1 AFR just to be safe.
The stock timing on 2010 Evo X was the same as the timing on the 2008 Evo X. This was a real problem for moded and untuned cars. Mitsu leaned out the AFR with lean spool enabled, kept the timing the same and then the owner adds more power mods. The result was a LOT of knock, at least on this Evo X. Evoscan registered up to 14 counts of knock. On all three base line logs there were more than 3 counts of knock from 5000 rpm all the way to redline. I will have to log more 2010 Evo Xs to see if this is isolated to this car or not.
Anyway, here is the before and after ignition timing advance on this Evo X:
http://www.sr20deracing.com/looneytuning/Evo/Roy/tim_b4_after.gif
Timing was slightly lower than stock at peak boost and about 8-9* lower than stock by redline. In the mid-range timing was 2-6* lower than stock.
The car responded nicely to its new tune. Here is the road dyno power chart.
http://www.sr20deracing.com/looneytuning/Evo/Roy/dyno_b4_after.gif
The power gains were across the rpm range, no one area lost power. The maximum gains is where you drop a perpendicular line from the higher power trace to the lower one. The peak gain is the increase from stock peak trace to the tuned peak trace.
Peak power gain: +37 hpÂ*
Peak Torque gain: +34 ft-lb
Max power gain: +42 hp
Max Torque gain: +39 ft-lb
All the car needs now is a hi-flowing exhaust to free up more hp and torqueÂ* O0
AEM Intake
Nisei 1PC Upper IC Pipe
Test Pipe
The target AFR, timing, and boost in the 2010 rom is the same as those in the factory reflash 2008 rom. The main difference between the two is that Mitsu decided to enable lean spool in the 2010 rom. Once lean spool is enabled the logged wideband AFRs become leaner even though both the 2008 and the 2010 roms use the same target fuel maps. The thing that I do not understand is why didn’t Mitsu enable lean spool on the 2008 Evo X. Did they forget?
Check out the AFR on these cars vs. the AFR on this 2010 Evo X. Note how the AFR dips into the 9:1 ratio on the 2008 Evo X while the 2010 Evo X has a semi-decent stock AFR.
http://www.sr20deracing.com/looneytuning/Evo/Roy/afr_08_10.gif
You might object that the second car has more mods and that is leaning things out more. So here is another 2008 Evo X with more mods vs. the 2010 Evo X. You will note the same rich 9:1 AFR on the 2008 Evo X vs. the 11:1 to 10.4:1 AFR on the 2010 Evo X.
http://www.sr20deracing.com/looneytuning/Evo/Roy/afr_08_10-2.gif
The stock boost between the 2008 Evo X and the 2010 Evo X did not change much. Here is the before and after boost profile on this 2010 Evo X:
http://www.sr20deracing.com/looneytuning/Evo/Roy/psi_b4_after.gif
The stock boost was typical of an Evo X with an AEM intake/UICP/TP. Boost peaked at 4000 hitting 23.30 psi. Boost then tapered all the way to 14.90 psi by redline. The tuned boost was much better, hitting peak 500 rpm sooner at 25.96 psi and tapering to only 18.94 psi by redline. The tuned boost was 2.66 psi higher than stock at peak and 4.04 psi higher than stock by redline.
Since enabling lean spool already leaned out the AFR, I did not have to change the AFR much. It was a far cry from high target AFRs that a tuner has to enter in a 2008 fuel map. Here is the before and after AFR on this car:
http://www.sr20deracing.com/looneytuning/Evo/Roy/afr_b4_after.gif
I simply leaned out the AFR to get it solidly into the mid 11:1 ratio and then tapered it t6o 11:1 by redline. Above 7000, I dropped it to 10.6:1 AFR just to be safe.
The stock timing on 2010 Evo X was the same as the timing on the 2008 Evo X. This was a real problem for moded and untuned cars. Mitsu leaned out the AFR with lean spool enabled, kept the timing the same and then the owner adds more power mods. The result was a LOT of knock, at least on this Evo X. Evoscan registered up to 14 counts of knock. On all three base line logs there were more than 3 counts of knock from 5000 rpm all the way to redline. I will have to log more 2010 Evo Xs to see if this is isolated to this car or not.
Anyway, here is the before and after ignition timing advance on this Evo X:
http://www.sr20deracing.com/looneytuning/Evo/Roy/tim_b4_after.gif
Timing was slightly lower than stock at peak boost and about 8-9* lower than stock by redline. In the mid-range timing was 2-6* lower than stock.
The car responded nicely to its new tune. Here is the road dyno power chart.
http://www.sr20deracing.com/looneytuning/Evo/Roy/dyno_b4_after.gif
The power gains were across the rpm range, no one area lost power. The maximum gains is where you drop a perpendicular line from the higher power trace to the lower one. The peak gain is the increase from stock peak trace to the tuned peak trace.
Peak power gain: +37 hpÂ*
Peak Torque gain: +34 ft-lb
Max power gain: +42 hp
Max Torque gain: +39 ft-lb
All the car needs now is a hi-flowing exhaust to free up more hp and torqueÂ* O0