Megan370z

the VQ37vhr might be a whole new engine but you cant do much when you can only adjust the ignition timing and AFR ,,,

to begin with you had your car at 12.5afr which is within the sweet spot and the gain is quite limited .
there is a difference in power that can be felt in a 10 degree difference ... i remember having 282 whps at one point on the dyno then come back at a later date to only have 273 ( i was pissed but understood the weather has a big effect on power)

after looking at your dyno sheet .. and the result isn't that great than you think they are. the big number is way more appealing to your eyes than what it really is

look at the graph in his whole

picture 1 *Base*; average
3000 rpm = 129 whp
4000 rpm = 163 whp
5000 rpm = 208 whp
6000 rpm = 241 whp
6800 rpm = 257 whp (reference peak power on SG tuned map)
7000 rpm = 266 whp
7300 rpm = 268 whp

Picture 5 *aphtuned*
3000 rpm = 126 whp
4000 rpm = 167 whp
5000 rpm = 209 whp
6000 rpm = 247 whp
6800 rpm = 264 whp (reference peak power on SG tuned map)
7000 rpm = 270 whp
7300 rpm = 280 whp

total gain from the Base dyno and the APH tuned map
3000 rpm = - 3whp
4000 rpm = +4 whp
5000 rpm = +1 whp
6000 rpm = +6 whp
6800 rpm = +7 whp (reference peak power on SG Tuned map)
7000 rpm = +4 whp
7300 rpm = +12 whp

OK what is good to have a Peak power for the last 300rpm ? of + 8whp from the 7000rpm ... your just having a very small gain in a fraction of sec ..
while the big fast gain is in the middle to high power range ,,, the result I see from the APH is not that good and couldn't do much better than Sasha did

just look at his dyno sheet that you provided in one of your post

Sasha @ Sg-MotorsportBase dyno
3000 rpm = 138
4000 rpm = 181
5000 rpm = 223
6000 rpm = 257
6804 rpm = 283.2
7000 rpm = cant be counted because graph nose down (guessing 275whp)

tuned Map
3000 rpm = 138
4000 rpm = 185
5000 rpm = 228
6000 rpm = 262
6804 rpm = 288.5 (Peak power)
7000 rpm = cant be counted because graph nose up (guessing 280 whp)

Total gain
3000 rpm = +0 whp
4000 rpm = +4 whp
5000 rpm = +5 whp
6000 rpm = +5 whp
6804 rpm = +5.3 whp (peak power)
7000 rpm = +5 whp (result if the graph would have continued from what it was doing)

Winner gain
3000 rpm = APH -3 whp SG +0whp
4000 rpm =APH +4 whp SG +4whp
5000 rpm =APH +1 whp SG +5whp
6000 rpm =APH +6 whp SG +5whp
6804 rpm = APH +7whp SG +5.3whp
7000 rpm =APH +4 SG +5


Conclusion ; SG tuned map is better suited for racing.
APH did provide a very small gain over Sasha tune over 6000 rpm,,,
since Sasha's Dyno read a little bit lower than APH dyno , we can say the winner is really Sasha @ SG-Motorsport

if you cant read number but just peak power ,, well continue thinking like that as Me and Sasha will pass you on the road course.


There is no black magic to be done with the VQ37 you only have ignition timing and AFR ..


and from what I understand on the mistake APH did on the dyno with your car which has an influence on the gain you see.
why ?
The Dyno read Horsepower = speed of acceleration. since the dyno think you have a shorter gear , it thinks that you are spinning faster in the same amount of time that the tuner set (6-12 sec acceleration) which means higher HP
since you got some gain with the APH but in reality they are lower than you think...
who do you trust now ?