Street hood - Medium Riser Intake

[ACHiPo]

Troy,
I'm reading this with interest, as I will have a BlueThunder 1x4 intake, which as you say is taller than a sidewinder or RPM. One thing to watch out for with the large dropped air filters is boiling the fuel out of the carb on hot days. A carb spacer may help, but adds to the height. One of the guys in our club had to drop back to a 9" to solve his problem with fuel boiling.

[patrickt]

Originally Posted by ACHiPo

Troy,
I'm reading this with interest, as I will have a BlueThunder 1x4 intake, which as you say is taller than a sidewinder or RPM. One thing to watch out for with the large dropped air filters is boiling the fuel out of the carb on hot days. A carb spacer may help, but adds to the height. One of the guys in our club had to drop back to a 9" to solve his problem with fuel boiling.

This is actually a serious issue, and one that a lot of guys are completely unaware. I have a BT 1x4 with a removable turkey pan. When I have my floats set just right, the fuel will not percolate out of the boosters on a really hot day, but it will percolate if the turkey pan is removed. Because of the tilt of the engine in the compartment, and the angle of the BT intake, you can't just blindly set your levels to the bottom of the sight holes. To get it right you have to take some time.

[66gtk]

Originally Posted by ACHiPo

Troy,
I'm reading this with interest, as I will have a BlueThunder 1x4 intake, which as you say is taller than a sidewinder or RPM. One thing to watch out for with the large dropped air filters is boiling the fuel out of the carb on hot days. A carb spacer may help, but adds to the height. One of the guys in our club had to drop back to a 9" to solve his problem with fuel boiling.

I'm not following how a 9" vs 14" matters unless you are talking about using a 9" with a spacer because the 14" is now too wide to fit?

[ACHiPo]

Originally Posted by 66gtk

I'm not following how a 9" vs 14" matters unless you are talking about using a 9" with a spacer because the 14" is now too wide to fit?

Sorry I wasn't clear. The problem was not a physical interference, but rather the guy had issues with percolation when he used a dropped 14"--it acted like an insulating blanket/IR reflector trapping engine heat and the carb bowls would boil over when he stopped, flooding the engine. By moving to a smaller filter and a carb spacer with radiation shield, he fixed the problem.

[Gaz64]

Perhaps a base not made from a heat conductor:

CFD 4150 4 Barrel Air Cleaner Bases