Carb help please
Carb help please I need to get a carb for my build. I know I need some where between 750-850cfm. My engine specs 6.0/821 heads/ Vic jr/ 227/242 cam. I read carb descriptions and they list all these features like 4 or 2 corner idle/ something about metering blocks. Vac/mech secondaries.
Do I just need a plain ole 750 double pumper?
I came across a nice used quick fuel slayer series 750 vac secondaries. Will this work good for mainly spirited street driving?
Do I just need a plain ole 750 double pumper?
I came across a nice used quick fuel slayer series 750 vac secondaries. Will this work good for mainly spirited street driving?
Yes the quick fuel 750 will work for like you said "mainly spirited street driving"
Vac secondaries means that the back 2 barrels open up at a certain time and during WOT, at a certain vacuum set by a spring. Mechanical secondaries open the secondaries as soon as you hit WOT, there is no delay. This can be good for race but can cause a bog to a heavier vehicle or one not set up for such a quick hit.
Vac secondaries are great for heavier vehicles, mechanical for lighter and race vehicles.
The difference between the 2 or 4 corner idle is tuneability. 4 you have more tuneability, but you will be fine with 2.
Metering blocks, holley 4160 series carbs have a metering block for the primary side and a metering plate with NON adjustable jets, 4150 series has a block on the primary and secondary so you can jet both sides. I had a 4160 modified to a 4150 by removing the secondary plate and adding a metering block.
Vac secondaries means that the back 2 barrels open up at a certain time and during WOT, at a certain vacuum set by a spring. Mechanical secondaries open the secondaries as soon as you hit WOT, there is no delay. This can be good for race but can cause a bog to a heavier vehicle or one not set up for such a quick hit.
Vac secondaries are great for heavier vehicles, mechanical for lighter and race vehicles.
The difference between the 2 or 4 corner idle is tuneability. 4 you have more tuneability, but you will be fine with 2.
Metering blocks, holley 4160 series carbs have a metering block for the primary side and a metering plate with NON adjustable jets, 4150 series has a block on the primary and secondary so you can jet both sides. I had a 4160 modified to a 4150 by removing the secondary plate and adding a metering block.
