I went to the track yesterday and decided to test a water and methanol mixture. I didn't measure precisely, but I'm guessinng it's around 70% Meth and 30% Water.
Please excuse me if I'm not being too scientific here, but these are the things I observered. The first observation is the mix changed my tune, I'm running the TT SD Chip and on the 100% meth tune the ECM was pulling fuel to reach my target A/F ratio (Set to 10.7). Running the water/meth mixture, the ECM is adding more fuel to keep the same A/F ratio. Also the Intake manifold temps took a nice nose dive. What was previously high 180 to mid 190 degree temps are now around 165 degree temps. Outside temps were about the same as other runs I've had, high 60s to low 70s
On my last pass yesterday, I was able to run slightly more boost than before, aournd 1 psi more, with absolutely no knock. I haven't tested my new upper boost limit, but I'm going to try raising it some more next time (Which is probably today).
So far the only negative thing I've run into so far is the car starts trying trying really hard to achieve the correct A/F ratio once it goes to 3rd gear. In the current tune, the timing drops from 23.6 degrees in to 19.4 My current thinking is that this is too big of a drop which makes the ECM battle to get back to the correct A/F ratio. On the track it pulls really strong on the first 1/2, but you can feel hesitations on the last 1/2 of the track.
Attached is the powerlogger file from my last run yesterday. My ET was 8.01 and MPH was 86. This was not my personal best. This track is considered the slower of the two tracks in the area. 90% of the time I go to the faster of the two (Plus it's only 10 minutes away as opposed to 45 minutes away).
Please excuse me if I'm not being too scientific here, but these are the things I observered. The first observation is the mix changed my tune, I'm running the TT SD Chip and on the 100% meth tune the ECM was pulling fuel to reach my target A/F ratio (Set to 10.7). Running the water/meth mixture, the ECM is adding more fuel to keep the same A/F ratio. Also the Intake manifold temps took a nice nose dive. What was previously high 180 to mid 190 degree temps are now around 165 degree temps. Outside temps were about the same as other runs I've had, high 60s to low 70s
On my last pass yesterday, I was able to run slightly more boost than before, aournd 1 psi more, with absolutely no knock. I haven't tested my new upper boost limit, but I'm going to try raising it some more next time (Which is probably today).
So far the only negative thing I've run into so far is the car starts trying trying really hard to achieve the correct A/F ratio once it goes to 3rd gear. In the current tune, the timing drops from 23.6 degrees in to 19.4 My current thinking is that this is too big of a drop which makes the ECM battle to get back to the correct A/F ratio. On the track it pulls really strong on the first 1/2, but you can feel hesitations on the last 1/2 of the track.
Attached is the powerlogger file from my last run yesterday. My ET was 8.01 and MPH was 86. This was not my personal best. This track is considered the slower of the two tracks in the area. 90% of the time I go to the faster of the two (Plus it's only 10 minutes away as opposed to 45 minutes away).