Hello,
I did the methanol kit to feel confident in moving the boost up to 10 PSI. I am running the 8.5 PSI springs in the wastegate and have put a Turbosmart Boost T in the boost reference for the wastegate. The Boost T is a pneumatic bleed valve taht allows adjustment of the boost reference, regardless of the springs loaded in the wastegate. It also has a "Gate feature" that reduces wastegate creep at lower boost levels.
(Another advantage to the Boost T: if I am on a long trip and run out of methanol, I can adjust the Boost T to full open and drop back to 8.5 PSI max to protect the engine. The LED on the dash will flash an error when the methanol gets below the sensor.)
TS-0101-1102 - All New Boost Tee Manual Boost Controller (Black)
www.turbosmart.com
Since there is no way to take out timing with the stock computer and I do not have an intercooler, the methanol kit reduces the intake air temp to compensate and hopefully suppress detonation.
Right now I have the Boost T adjusted to yield just over 10 PSI max (about 10.2 PSI). The first drive I took with the Boost T, I noticed that it does build boost faster and pulls better at lower boost levels. I think this is the "Gate feature" they advertise.
Note: I have extensively modified the stock fuel system to get to this boost level. I have a Supra fuel pump, a Landtank Scaled Injector kit (larger MAF housing and Subaru WRX injectors), and now the Methanol Injection kit. This is not a stock configuration.
Benefits are reduced intake air temperature. As boost builds, the temp rises until I hit 5 PSI, where the methanol kit starts injecting. The temp hits about 130 F then flattens off and starts to reduce as boost rises. I need to gather some more data at the current boost level, as I have only been here for a week. I do not hear or see any signs of detonation. Ambient temps have been low here in Santa Rosa this past week. Morning fog and temps not much over 75 F. The test will be this summer on trips to the Sierra with temps over 100 in the valley.
I am using Boost Juice for the methanol injection fluid. You can buy it on Amazon. I have not refilled the tank since just after my first testing, where I had the medium flow nozzle in and the engine was stumbling due to too much methanol. I burned 1/2 of a tank on those early runs. Since then I have used just 1/2 of a tank in about 300 miles of driving. A bunch of that has been WOT runs up a local hill to test the system, which I would not normally be doing.
The AEM kit does not require IAT temp input. But, given the point of installing it is to reduce IAT, being able to monitor it is a must. I use the numbers as feedback for adjusting the AEM controller.
The kit I bought is AEM P/N 30-3300. It is for 35 PSI max boost (overkill) but the lowest one they sell. As I mentioned in an earlier post, the max flow boost setting is more about changing the slop of the injection line. I found mine on ebay. A guy had bought it for a project that did not happen, so, I got it at a discount. The kit lists on AEM's website for $477.