[Bernica]

FWIW, Here is how my 4150 DP with mech secondaries and no choke came from Patrick after filling out his spec sheet and talking to him. My motor is a 482 Shelby FE with around 11:1 comp, Stage II Shelby heads and a .572" cam with 236 dur and 108 LSA.

In no way am I suggesting that you jump to a build like this. It's just an example of what Patrick came up with for my motor. As we all know, every motor is different. But if anyone can do it, it's Patrick.

JETS
Primaries: 80
Secondaries: 88

PUMPS
Primary: 50cc
Secondary: 30cc

SQURTERS
Primary: 42
Secondary: 42

POWER VALVE
Primary: 6.5
Secondary: Plugged

AIR BLEEDS
Hi Air: 36
Idle Air: 76