What makes the Thunder AVS the best Street Performance Carburetor available?
Newly designed primary and secondary booster clusters offer the most accurate and up to date calibration available of today’s blended fuels and octane levels. The Thunder Series’ unique AVS feature allows for limitless calibration of the secondary circuit with simple hand tools while on your vehicle. It’s quick. It’s simple. It’s effective. Counterweighted secondary carburetors utilize a heavy, non-adjustable “counterweight” that relies solely on the velocity of the air coming through the secondary venturis to roll open the secondary air door. Under certain conditions, a delay or stumble can occur when transitioning between the primary and secondary circuit at Wide Open Throttle (WOT). This is due to the velocity not being able to roll the air door open fast enough. This condition is virtually eliminated with the AVS feature.
