Anyone using them? I am ....but seems to be flooding when I'm in rough water. I went to them trying to increase flow on my 1100 hp Procharged motors. I will be switching back this week to the .130 Viton needle and seats. I am running 7lbs idle fuel pressure. I played all over the place w/fuel level.... no change. These are 850 Prosystems carbs. It has been recommended that I try C & S ......but I plan on going to fuel injection this winter. I am using a Fast 02 meter cruising on primaries 12.5. WFO still at 12.5. When I am getting on plane ( at angle) or in rough water blubbers 02 drops in low 11's high 10's?

Are you running a boost referenced fuel psi regulator?

Don't thing they are for use with regular fuels..go back to the regular ones

YES

and rear jet extenions?

Rear Secondary main extensions

I'm running a 950 prosystems carb and have no issues like that...procharged as well...

Back in the day I used to run dual needle & seat bowls at 5 PSI. Much better control & plenty of volume.

EZ,
How much boost? what size engine? What Hp? Do you remember jetting sizes?

Primary?
Secondary?
Power valve size?

Thank you
Randy

HP500 +.030 509, other wise stock, with lightning headers, carb is strait from prosystems 68pri jets, 86 sec 6.5 PV primary only...looking at 7-8 psi boost....carb seems a little rich right now..still tuning..waiting on some more blower pulleys that seem to be lost in shipping !!! M3sc blower