South Africa hope to maintain the momentum from four victories and 25 tries this season when they face Argentina for the second consecutive weekend in Mendoza today. The Springboks made a dream start to the Rugby Championship last Saturday in Soweto, scoring nine tries in a 73-13 romp against Los Pumas. It was a record winning margin for the southern hemisphere championship and cast South Africa in a new light of adventurous rugby rather than a predictable kick-and-chase outfit. South Africa scored 23 tries in 12 tests last year. This season they have already notched 25 against Italy, Scotland, Samoa and Argentina with JJ Engelbrecht and Bryan Habana claiming four each. Satisfied that the team has improved since he took charge last year, coach Heyneke Meyer wants to see the recent home form transferred to western Argentina. His ambition with an unchanged starting line-up is another bonus-point victory against opponents who have made five alterations, three of them injury induced. "We are developing a killer instinct as a team and the challenge now is to have the same attitude away from home," Meyer said. "Last weekend has to be forgotten and we must show ruthlessness against a wounded opponent. We were clinical in Soweto and we must be equally clinical in Mendoza. "Those tries did not come from throwing the ball around. The team played with structure and purpose and wore down the Pumas. That is what we must build on." Dominant in the set pieces and loose exchanges a week ago, South Africa seem set to triumph in a country where their biggest winning margin was 32 points nine years ago. But if Argentina can rekindle the passion of last season and tackle better - they missed one in three in Soweto - another humiliating defeat should be avoided.