Compresion and torque?
Drifting
Joined: Sep 2006
Posts: 1,259
Likes: 2
From: MS
More compression definitely adds torque, power and fuel economy.
Vizard says raising compression from 9:1 to 11:1 adds 3.2% more power with a
street cam and even more with a longer duration cam.
Also says that fuel economy gains will be about double the power gains in percentage.
Vizard says raising compression from 9:1 to 11:1 adds 3.2% more power with a
street cam and even more with a longer duration cam.
Also says that fuel economy gains will be about double the power gains in percentage.
Pro
Joined: Jun 2007
Posts: 634
Likes: 0
From: Hastings MN
More compression definitely adds torque, power and fuel economy.
Vizard says raising compression from 9:1 to 11:1 adds 3.2% more power with a
street cam and even more with a longer duration cam.
Also says that fuel economy gains will be about double the power gains in percentage.
Vizard says raising compression from 9:1 to 11:1 adds 3.2% more power with a
street cam and even more with a longer duration cam.
Also says that fuel economy gains will be about double the power gains in percentage.
And yes, CR has a much larger effect on efficiency than power. This is due to the fact that the higher compression ratio results in less loss (percentage wise) in pumping work.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Just changing the compression won't do much, you need to change the cam at the same time. Basically speaking you increase the CR and put in a bigger cam you will make more power, more power means more torque.
It will move the peak torque up to a higher RPM but you will still have more torque throughout the entire RPM range than a lower compression motor with a smaller cam
It will move the peak torque up to a higher RPM but you will still have more torque throughout the entire RPM range than a lower compression motor with a smaller cam
