1g or 2g head?

[602gsx]

which is head is better to make more power or flows better? i keep hearing different

 

[Rockyp]

Check this out before you think of swaping heads. It's not always nessecary. look around the site for other answers from guys who've done this in the past and see their goals to compare with yours. http://www.roadraceengineering.com/1g2gheadswaptechtip.htm
And this. http://www.dsmtuners.com/forums/newbie-forum/323985-1g-head-2g-motor.html

 

[Notsostockgsx]

On a 2g the ports are smaller and give better low end torque but suffer up top because of restriction. Where as the higher flowing 1g head will make you lose some low end torque but will have nice gains up top.

1g heads have a poor angle to the valve whereas the 2g heads are pretty much a straight shot, and although the intake runners are smaller they give the 2g head better volumetric efficiency because the Velocity of the incoming air and fuel is increased


The HP increase from a 2g head to a 1g head is from the Slightly larger cams and better flowing factory intake manifold.


hope this helps out some with your debate

 

[602gsx]

Thanks guys,appreciate it!

 

[whe3ls]

personly i like the 4g61 head.