Hitman's Pontiac Trans Am Forum

General => General Discussion => Topic started by: Kev77 on October 18, 2019, 01:47:39 PM

Title: LOW COMPRESSION
Post by: Kev77 on October 18, 2019, 01:47:39 PM

 If higher compression engines are more efficient, why did the manufacturers reduce compression in the 70s

Title: Re: LOW COMPRESSION
Post by: LWS78SE on October 26, 2019, 05:49:48 PM

A higher compression engine runs better,cooler and with more power but it is dirtier out the tail pipe, NOX. Your lower compression engine has had the timing retarded to lengthen combustion time and heat up the process and burn up more hydrocarbons. You can also get by with lower octane gas, no knocky. Sounds like BS to me. or a way to sell shitty gas. ;)

Title: Re: LOW COMPRESSION
Post by: Kev77 on October 30, 2019, 02:56:32 PM

 Got it