65Fastback
Active member
Hello,
I am running a Holley 7448 350 carb on a OZ250 head with a comp cam 260 and DS2.
To get the best out of the engine I have a couple of questions:
1. Transfer Slots: My tslots are not exposed at all at idle. It takes a full turn at the curb idle screw to make them square.
This would mean going from 800 to over 1100 rpm at idle. In theory unexposed tslots result in hesitation off idle, which I had in the past and "cured" this with the biggest available power valve, high initial timing and a slightly rich idle mixture. What can I do better to get square tslots?
2. Power valve: In the vacuum chamber behind the power valve, in the main body, I always see some drops of fuel. Yesterday I realized that the pv thread isn't straight in the metering block. The valve sits a bit inclined in the block. I tried to mitigate this with two thick pv gaskets and high torque. But it seems to be not fully tight. Do I need to buy a new metering block or can this be ignored?
Cheers
Joerg
I am running a Holley 7448 350 carb on a OZ250 head with a comp cam 260 and DS2.
To get the best out of the engine I have a couple of questions:
1. Transfer Slots: My tslots are not exposed at all at idle. It takes a full turn at the curb idle screw to make them square.
This would mean going from 800 to over 1100 rpm at idle. In theory unexposed tslots result in hesitation off idle, which I had in the past and "cured" this with the biggest available power valve, high initial timing and a slightly rich idle mixture. What can I do better to get square tslots?
2. Power valve: In the vacuum chamber behind the power valve, in the main body, I always see some drops of fuel. Yesterday I realized that the pv thread isn't straight in the metering block. The valve sits a bit inclined in the block. I tried to mitigate this with two thick pv gaskets and high torque. But it seems to be not fully tight. Do I need to buy a new metering block or can this be ignored?
Cheers
Joerg