- Jan 4, 2011
- Reaction score
I have a question which I should know the answer to but I am not doing well. I am building a horizontal twin IC engine. My thinking is that the two cylinders should fire 180° apart. I have both cylinder set up for exhaust to open 40° BBDC and close 20° ATDC. Intake open 15° BTDC and close 45° ABDC with the other cylinder 180° after the first. I have good compression but I cannot get the engine to actually run or even fire well. The cylinders get warm but no actual firing. The engine turns over but the two cylinders seem to be fighting each other. The engine actually acts like it is backfiring. I have tried different ignition positions but I am not even close to having the engine running. Any idea what I am missing?