[race-it]

This is the present set up for my engine. I have a backfire issue at idle and low throtle. Any suggestions from the guys that use webbers on what to do to minimize popping? I have to re-dyno due to dyno improperly set on last tune up.

347 Stroker
Stroke: 3.400
Bore: 4.030
Connecting Rods: Scat I Beam 5.400"
Pistons: J&E Forged
Cam: Solid Roller
106 Degree LSA In Ck 104 Degree
Dur. In 228@050 Lift .635 Inch
Dur. EX 234@ .050 Lift .638 Inch
Lifters: Comp Cams Solid Roller
Heads: Ford Motor Sports Aluminium 1.94 X 1.6
Rocker Arms: Comp Cams 1.6
Weber: 44 IDF 18990.030
Compression: 10.25 to 1

44 IDF Webber Set Up
Venturi ----------------36 mm
Aux Venturi -------------4.50mm
Main Jet ---------------145 mm
Air Corrector----------- 180 mm
Emulsion Tube---------- F-11
Idle Jet---------------- 55 mm
Pump Jet --------------.50mm
Needle Valve -----------1.75mm
Pump Exhaust Valve----- 55mm
Float Adjustment------- 32.5/10mm
Idle Fuel Screw--------- one turn out