Justin@VMP
August 7th, 2008, 11:40 AM
The graphs below are from some testing I did back in the cool fall/winter months of 2007. While testing the C&L Intake, I swaped on a prototype VMP Dual 66MM Throttle Body to see what kind of gains could be realized with a stock blower.
When removing the restriction of the stock dual 60MM throttle body on the inlet of the blower, the power increases by a solid 8RWHP above 5000RPM. Boost increased by about .6 psi due to the increased airflow.
During this particular test the stock blower only had a 2.6" upper pulley on it, and was only making about 13psi. Once you start increasing airflow with porting, a lower pulley, or an even smaller upper pulley (2.2" or 2.4") larger gains of 10-20RWHP will be realized from the VMP throttle body. Once you reach 550-600RWHP the stock throttle body becomes a huge restriction. On TVS cars you can expect a gain of 20-25RWHP from the VMP TB, depending on your boost level.
Click Here VMP Throttle Body for GT500 (http://www.vmptuning.com/store/index.php?p=product&id=298&parent=105)
http://vmptuning.com/GT500/TB/M122stocktbvsvmp.jpg
http://vmptuning.com/GT500/TB/VMPTB1.jpg
http://vmptuning.com/GT500/TB/VMPTBPolished2.jpg
When removing the restriction of the stock dual 60MM throttle body on the inlet of the blower, the power increases by a solid 8RWHP above 5000RPM. Boost increased by about .6 psi due to the increased airflow.
During this particular test the stock blower only had a 2.6" upper pulley on it, and was only making about 13psi. Once you start increasing airflow with porting, a lower pulley, or an even smaller upper pulley (2.2" or 2.4") larger gains of 10-20RWHP will be realized from the VMP throttle body. Once you reach 550-600RWHP the stock throttle body becomes a huge restriction. On TVS cars you can expect a gain of 20-25RWHP from the VMP TB, depending on your boost level.
Click Here VMP Throttle Body for GT500 (http://www.vmptuning.com/store/index.php?p=product&id=298&parent=105)
http://vmptuning.com/GT500/TB/M122stocktbvsvmp.jpg
http://vmptuning.com/GT500/TB/VMPTB1.jpg
http://vmptuning.com/GT500/TB/VMPTBPolished2.jpg