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Old 01-31-2010, 03:37 PM
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outlaw cylinder head ?

What are the hoses coming out of the heads on some late model and outlaw cars? These are the only engines I've noticed them on. They look like quick disconnect air lines, like what we use at work.

Just curious
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Old 01-31-2010, 03:42 PM
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Not sure what lines you are talking about,some are fuel lines from the pump to injection some are fuel injection lines to the nozzles some are water or coolant lines and some are dry sump oil lines
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Old 01-31-2010, 04:16 PM
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Some race cars have direct injection into the cylinder. Not sure what Outlaw cars you are referring to but a lot of the 410 and Outlaw sprint cars have this. Direct alcohol injection as well as port injection. 16 injectors on an 8 cylinder engine.
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Old 02-02-2010, 11:29 AM
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There the ones on the outside of the head, exhaust side, yes outlaw sprint cars. I found one photo with out the injection setup on it and they (8) looked to be connected to a regulator. I couldn't understand why they would have injection on the opposite side of the port if thats what they are. Thanks.

http://www.racingjunk.com/category/1...SuperSize=true

Last edited by 6426yy; 02-02-2010 at 11:40 AM.
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Old 02-02-2010, 11:40 AM
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some have a water supply to the center of the head...this is normally a #4 or #6 line plumbed it the center under the two center ports. if there are for on each side.......some of the outlaw cars run a "down nozzle"...this is actually the injector nozzel ported directly into the cylinder. It is probably a Coolant line since you stated that you saw them on some latemodels....latemodels are a carbed class only.. do not run injection.

Ohh Didnt see the pic... Those are the injector fuel nozzles.

Last edited by wwilliams181; 02-02-2010 at 11:46 AM.
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Old 02-02-2010, 09:41 PM
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Those are injector nozzles for the fuel injection, commonly called down nozzles. They are actually drilled through into the valve pocket above the back of the valve so that they spray into the cylinder and high speed air stream when the valve is open. The advantage to them is when you put the fuel into the port it takes up area that could be just air, so you get more total air into the engine if you put the fuel in later. More air = more power.

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Old 02-03-2010, 03:38 AM
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Quote:
Originally Posted by ericnova72
Those are injector nozzles for the fuel injection, commonly called down nozzles. They are actually drilled through into the valve pocket above the back of the valve so that they spray into the cylinder and high speed air stream when the valve is open. The advantage to them is when you put the fuel into the port it takes up area that could be just air, so you get more total air into the engine if you put the fuel in later. More air + more power.

i didn't even see the pic. no offence but that is a normal mod for track cars they take coolent away from the 2 center exhaust ports on a SBC. what the heck are you talking about??? injectors, no way. carb track cars never have injectors, no less at just the center ports.
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Old 02-03-2010, 05:15 AM
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Hey guys, I race a 410 sprint car. I don't know about late models, but most 410's use reverse cooling. There are (2) -12 hoses that come off the crank-driven water pump-one hose pumps water directly into the center of each head below the two center exhaust ports. These are the only places water enters the engine. Then there is usually a -6 fitting on the front & rear of each head up top that pokes thru the injection, as well as -8 fittings in the block where the freeze plugs would be-these are the water outlets and they go directly to the radiator. There is no thermostat or great big hose for a water oulet from the front of the intake like a passenger car would have. Ericnova72 was exactly right about the fuel down nozzles in the head-it sprays fuel directly at the back of the valve and into the cylinder when the valve opens. Most 410's are 16 nozzles-one up in the injection by the butterfly and one down nozzle per cylinder. Attached is several pics showing cooling system, down nozzles, oil pump, etc... The engine shown does not have up nozzles.


http://www.hoseheadsclassifieds.com/...dKey~25954.htm

Last edited by Adam65; 02-03-2010 at 05:24 AM.
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Old 02-03-2010, 05:57 AM
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In the pic posted by 6426yy, the hoses in question are for the down nozzles from the fuel injection. Adam65's linked pic shows both the down nozzles between the exhaust ports into the back of the intake valve bowls, roughly at the same height as the exhaust ports; and the additional cooling lines, plumbed to the head directly below the center exhaust ports and two spots on the side of the block. Really clear pic

The down nozzles have a 90 down spray pattern at the tip, like a nitrous Fogger nozzle has.
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Old 02-03-2010, 06:42 AM
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Up & down nozzles both actually shoot straight out the end, not @ 90 degrees. That's why the down nozzles are pointing down from up above like that. The little sintered bronze breathers that you see @ each down nozzle serve two purposes. When the throttle is open, they allow some outside air to be drawn into the fuel stream and out the nozzle, allowing higher pressure. This is the same concept as the air hose nozzles you can by that have several little holes in the tube just before where the air exits-plug them with your fingers while holding the lever wide open and the air output goes down. The other thing those little breathers do is drain fuel. Being alky, we shut the motor down by turning off a fuel supply valve to the engine before hitting the kill switch. However, there is always a little fuel left in some of the small nozzle lines. The breathers let that extra fuel drain on the ground after the engine dies instead of going in the cylinders and locking the engine up and bending a rod (or worse) the next time the car is started.

Just went back & reread the original post. If you saw quick disconnects, it was either on the fuel lines or the water lines from the engine to the radiator. This allows the crews to be able to change engines in around 10 minutes. Some even go farther & mount the radiator, msd box, and gauges & kill switch on dzus'd on panels that are all attached to each engine. That way you can change engines and the only thing you have to remove or break loose is the headers, the engine mount bolts, and possibly the air filters/stacks-the radiator and all the coolant stays with each motor.

Last edited by Adam65; 02-03-2010 at 08:31 AM.
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Old 02-06-2010, 12:26 PM
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Thanks guys it's always nice to learn somthing new.
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