New VMP Dual 66MM TB for GT500...

[Justin@VMP]

I just tested a prototype of VMP's new dual 66MM TB, to make sure there are no bugs before we do the full production run.

I decided to stick with a dual bore TB for several reasons. First and foremore is driveability and idle quality. I like to idle my GT500 at 700RPM (50RPM lower than stock) for creeping through parking lots and driving around car shows. I'm not looking to build an all out race car, but rather a street/strip car that I can daily drive.

My testing has shown that the dual 66MM provides all the airflow you'll need to make 650-700RWHP, and possibly even more.

When compared to the monoblade we saw no change in boost after the blower or vacuum at the inlet of the blower. Horsepower and torque were also the same. This indicates that the dual 66MM TB provides adequate airlfow for a TVS or other blower running 18psi and 650-700RWHP.

This TB is also great for stock and ported blower cars making 550-600RWHP. The dual bore design keeps velocity high while still providing plenty of air. On a stock blower with 2.6 upper you can expect gains of 8-10RWHP. On a stock or ported blower with upper + lower or very small upper (2.2-2.4) you can expect gains of 10-20RWHP.

The monoblade TB has its place if you are looking for all out airflow and 800+RWHP, but is overkill for many situations.





http://www.vmptuning.com/store/index...298&parent=103