Camfire

Everyone, applause all around. you have been exceptionally helpful and courteous. I tested my compression: 170, 170, 160, 170, 160, 170... so that's practically a "like new" engine, right? so arguing aside, the verdict is that I'm not actually hurting anything inside my engine with my exhaust system?

My '81 280zx N/A should be putting out 145 net HP stock. I've got: Header Straight pipe, no muffler Cool air intake -100 pounds weight redux. 20 Degrees BTDC timing 93 Fuel BUT: according to my calculations, I'm only pulling about 100 HP This is the formula I'm using: HP = Weight/(ET/5.825)³ Does this sound right to you guys? My ET is about 18 seconds, but I've only clocked it once. It was a pretty rough estimate, because I was using my trip gauge and stopwatch. so I may bring in better/ worse timing the next time I clock it. Even with my rough results, I'm pretty sure I should be showing higher HP. What have I overlooked? I'm too poor to take it to get dyno'd. Is something just probably wrong with my engine? I'm going to buy a compression gauge tomorrow.