What is the compression ratio of a stock 1986 350?

Answer 1

I don't know if there is an easy answer to your question. there are different h.p. engines in a lot of different vehicles of the same model. for instance if the vehicle was ordered for towing it may have a higher hp rating, there fore the compression ratio may differ. i think your best bet is to take the motor no. to your Chevy dealer and he can tell you exactly what you have for an engine. all 350's are not created equal. there are 350's with 200 hp and then there are 350's with better than 350 hp. the strange thing is that they look the same unless you know what your looking for. the compression ratio will most likely change with a higher hp engine with different pistons, and heads.