Speak to the folks at Jet Performance Products about thier Stage 3 carbs. They start with a factory Holley 4150 and finish the job that Holley should have done in the first place.
www.jetchip.com
STAGE1 - A Stage 1 Holley® 4 BBL vacuum secondary beings with the disassembly and inspection of the carburetor for proper sizing of the idle, transition, acceleration and main metering circuits. The main body and metering blocks checked for straightness, boosters are aligned in the venturi and the throttle bores are aligned for proper seating. The carburetor is then reassembled using the highest quality parts and minor calibration changes may be made if deemed necessary by our technicians.
STAGE 2 - A Stage 2 features all the modifications of a stage one plus; the fuel metering circuits are inspected, blueprinted and then calibrated to match any modifications done to the engine such as intake manifold, headers, ignition or cam change, and intended use of the vehicle. The air horn is milled to improve and equalize airflow between the primaries and secondaries (optional). A quick change cover kit is optional and allows changes in secondary opening rate in mere seconds. An optional secondary metering block allows the secondary jetting to be adjusted as well as the primaries. These features are standard on JET supplied Stage 2's and optional on customer supplied carburetors. Electric choke and four corner idle circuits are optional on all Stage 2 carburetors.
STAGE 3 - A Stage 3 is intended for high performance pro street style vehicles and racing applications. All Stage 3 carburetors include all of the Stage 1 & 2 modifications plus radiused air inlet area and modified venturis for greatly increased airflow, modified discharge boosters for increased signal strength and atomization, machines throttle shafts, four corner idle circuits, fully modified metering blocks, modified floats and high flow needle and seats. A secondary quick change kit and rear metering block are standard on all Stage 3 vacuum secondary carburetors. These carburetors are custom tuned and calibrated for each specific application. Electric choke is optional on all Stage 3 carburetors.
Call For Pricing... Qty: