While an engine compression tester may not be the most common tool in a mechanic's garage, they can be very useful, ...

Basics Increasing the CR produces an increase in output throughout the rpm range. It is also worth an increase in fuel economy. If a longer duration cam is installed, raising the CR at the same time ...

QUESTIONI am building a budget 1935 Ford truck rat rod and wondered if you could help with some basic engine mods. I have a complete running 1973 big-block Chevy truck chassis with all the components.

ABSTRACT An experimental investigation has been carried out to compare the indicated performance and heat release characteristics of a DI diesel engine at compression ratios of 18.4:1 and 15.4:1. The ...

At least 150hp of a Pro Stock engine is due to the use of ultra high compression ratios (CR) of 16:1--or more. 110 octane race fuels make this possible, but don't be fooled into thinking that the use ...