pacman1969

12a bridgeport,eldabrock 500 cfm 4 barrel,msd 6a digital,120gph fuel pump with return line and reg set at 10psi.throttles great and pulls hard,o2 reading are good at idel an under load,on track cuts out badly abouve 5,000 rpms or so usaly hard in corners.rotary expert set timing and say o2 readings good,ran it again and still cuting out on uper rpms in or just after hard cornering.turns up good in salom....then hard right or left and cutting out. do i need to rase float leval????

pacman1969

yep....lots of readers but no input from anyone here ether, i wonder if its because i dont have my roatry in a mazda............

chainreaction

Do you have a slosh tube in your carb? A 500 cfm is small for that motor, It should flow in excess of 580cfm. I run a 650 Holley on my B-port 12a ,I ran the same set up on a stock port 12a w/ different jetting, turning 9200 rpm's average and as high as 10,800 rpm's (sand drags) Are your fuel lines rubber or braided. I've seen similar issues with fuel line collapsing. Check between the tank and pump (the suction side) How often do you clean you air filter. Once the filter starts getting dirty, the rpm's drop off rapidly.

pacman1969

all thoes thing are good,keeping good fuel pres throughout.pluged a passage linking the 2 bowls together...was told in hard corners it would flow from 1 side to the other,as soon as wether permitts gonna run her an see if it workd.got a race in 2 weeks...that will be the real test! if not,thinking of trying 4 bike carb setup...cause i already have everthing i need.and if that still dosent work ill try a microsqurt frome megasqurt ( only $320) and go from there......just tird of workin on her and wanna fly!!!!