I built and broke in my 403, went through the tuning process / setting up dizzy curve ..ext, what we eventually came too is the engine was running lean - Carb related. I had a Qjet original to a 403 built by everyday performance, after trying a few things it still runs alittle lean, trys to cut out around 3100+ RPM under mid throttle, stalls at idle sometimes and has poor idle quality in gear. I havn't tried going to the next jet size up yet, that's next.
I picked up a donor carb to bolt up/tune in to see how it acts before i go any further with my Qjet. The donor carbs a Holley 4160 750 CFM vac secondary R3310-2 . Is this carb enough for my setup?
Specs...
350 Rocket heads 69' 66CC
Stock valve sizes, C/R should sit between 9 and 9.5 : 1
Cam
http://www.compcams.com/Company/CC/cam- ... =1463&sb=0
Lift : 491 / 476
Duration: 278 / 296
Range 2000-5800
Intake
Edelbrock 3711 performer low rise
Dual plane
I picked up a donor carb to bolt up/tune in to see how it acts before i go any further with my Qjet. The donor carbs a Holley 4160 750 CFM vac secondary R3310-2 . Is this carb enough for my setup?
Specs...
350 Rocket heads 69' 66CC
Stock valve sizes, C/R should sit between 9 and 9.5 : 1
Cam
http://www.compcams.com/Company/CC/cam- ... =1463&sb=0
Lift : 491 / 476
Duration: 278 / 296
Range 2000-5800
Intake
Edelbrock 3711 performer low rise
Dual plane
