I still feel your probably injecting 300hp worth of fuel and nos. The meth does contain more oxygen so in theory, it should net even more power but the cool combustion temp and the excessively retarded timing knocks much of the hit down.
Looking over all this info and seeing how much timing your pulling out, I have to wonder if the a/f ratio is even reading correctly. You have to be putting a ton of unburned fuel into the exhaust system. I'd tend to believe the motor would be happier with a 100-150 shot and more timing. Your already retarded at least 8* at your base of 30* while on the brake. An engine at 99kpa will take 38* easily while getting on the t-brake. Considering your engine is short stroke, it will take even more timing than an engine with a long stroke. Just looking over all of this. It would seem the engine with the proper amount of timing would need much less meth and nos to achieve the same result.
I agree with you totally on your train of thought. I do think that there is still some untapped power with less timing retard on the nitrous. That is still to be explored, in due time.
About the timing off the nitrous, that has already been thoroughly explored. It had been suggested to me awhile back that I should be at around 40 degrees full load, off boost. When I had first started this project I felt the same way. The research I did on burning alcohol led me to believe an alcohol engine typically runs 5 to 15 degrees more timing than when on gasoline, due to the slower flame speed of methanol. And that's how the timing table was originally setup at the start of the project. I think it was as high as 45 degrees at one time early into the project. I soon lowered it when I found that the additional timing was making no difference in power. I decided to settle on MBT (minimum best timing).
Using my low stall torque converter as a torque gauge, I would record the stall obtained at WOT with different degrees of timing advance. Basically, there was no difference between 30 to 40 degrees. Stall started to fall a bit at 28 BTDC, so I settled on 30. Why run more timing if there wasn't any gain? That just increases pumping losses.
An interesting thing about methanol. The degree of required timing advance changes with the a/f ratio being used. If you're running very rich for intercooling, the required advance needs to be more due to the slower flame speed of a very rich air to methanol ratio. Then, you think that flame speed would increase as you work lean with methanol, and it does. But then, your reach a lean point where flame speed again slows. That's one reason why you can get into trouble working lean to rich with methanol. You reach a point where the flame speed increases, cylinder pressures climb, timing hasn't been changed to compensate for the increased flame speed, and with the mixture still on the dangerous lean side, all of a sudden you're in big trouble. I feel this is what got me in trouble with this latest tuning adventure.
Methanol is a very interesting fuel.
As far as using less nitrous and fuel and more timing to get the same result, I'm not looking for the same result. I'm looking for a better result. Be patient with the timing advance on the nitrous, Dusty. I'm working on it.
I'm not pushing for anything, just thinking out loud for discussion.
You'll get to see me playing with all my switches. Oh Joy.
