down nozzle heads for alcohol
Thread Starter
Le Mans Master
Joined: Oct 1999
Posts: 6,366
Likes: 34
down nozzle heads for alcohol
Any one in here know anything about these heads, or how they work?
Mainly what is controlling the alcohol injectors?
Is this added on top of fuel, or is it the primary source of fuel?
Would you run a serious risk of hydrolock running these? Or do they only run at 4500+ rpms? I guess I just dont understand them.
I just came across them and find them very interesting.
Mainly what is controlling the alcohol injectors?
Is this added on top of fuel, or is it the primary source of fuel?
Would you run a serious risk of hydrolock running these? Or do they only run at 4500+ rpms? I guess I just dont understand them.
I just came across them and find them very interesting.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I recently sold a set of spread port Brodix -11 down nozzle heads. They were off of a 700 hp 360 class sprint car. My Super comp Dragster was also Hilborn injected.
It's mechanical FI. which is full time squirt. I've never had one hydro lock on me. From the barrel valve that controls flow to the 8 individual squirt nozzles the lines are relatively small so when the motor is shut down you don't have the volume of a whole fuel rail draining into the cylinder. Also typical shut down is to shut off the fuel and let the motor run the fuel out.
The advantage of down nozzle is: cooling directly on the valve and cylinder. Also your not impeading the column of dry air flow until the intake valve opens. The injector splash plate actually direct fuel right into the cylinder. So you have a longer injector stack of dry faster flowing air. Dry air weighing less than 8-1 methanol air has the ability to excelerate faster from a dead stop when the intake valve opens. The faster column of air keeps more fuel atomized for more complete combustion.
It's mechanical FI. which is full time squirt. I've never had one hydro lock on me. From the barrel valve that controls flow to the 8 individual squirt nozzles the lines are relatively small so when the motor is shut down you don't have the volume of a whole fuel rail draining into the cylinder. Also typical shut down is to shut off the fuel and let the motor run the fuel out.
The advantage of down nozzle is: cooling directly on the valve and cylinder. Also your not impeading the column of dry air flow until the intake valve opens. The injector splash plate actually direct fuel right into the cylinder. So you have a longer injector stack of dry faster flowing air. Dry air weighing less than 8-1 methanol air has the ability to excelerate faster from a dead stop when the intake valve opens. The faster column of air keeps more fuel atomized for more complete combustion.
Last edited by gkull; Nov 16, 2004 at 06:11 PM.
