You can't increase the carbonation without increasing the pressure or decreasing the temperature. Presumably the temperature is about right, so that leaves the pressure. It sounds like you need to check out some of the line balancing resources available. The basic steps for carbonating properly are:

• determine desired carbonation level
• Use maths or a cabonation chart to determine the pressure and temperature required to achive the desired carbonation level
• Select appropriate beer line - you need to have line that has enough resistance to slow the beer flow to a manageable rate with the pressure set to carbonation level

You can't increase the carbonation without increasing the pressure or decreasing the temperature. Presumably the temperature is about right, so that leaves the pressure. It sounds like you need to check out some of the line balancing resources available. The basic steps for carbonating properly are:

• determine desired carbonation level
• Use maths or a carbonation chart to determine the pressure and temperature required to achieve the desired carbonation level
• Select appropriate beer line - you need to have line that has enough resistance to slow the beer flow to a manageable rate with the pressure set to carbonation level

edited for spelling