No, the lead photo is not upside down, the carb is. This fuel mixer is equipped with Holley’s new vent tube spill reduction valve and the simple device will save lives, equipment, and lots of heartache the more vehicles it is placed on, especially race cars. Essentially this is a check valve that uses a ball to allow proper venting under normal circumstances but if the carb is ever overturned for any reason whether on your car or not, the ball follows gravity and lands in a seat where it largely prevents fuel from passing by it. Without these, you know what happens, the bowls empty out in quick fashion and if you are trapped in a car upside down and this thing dumps gasoline on a hot engine, things get very bad, very fast.
The video below shows the vent tube spill reduction valve in both illustrations and in a real world demonstration. The demo is as simple as you’d expect with carb being rolled over with and without the valves. These things are so stone simple we’re mad that we didn’t come up with the idea ourselves. If you are a racer, have a high performance street machine, or just fire-phobic like us, add a vent tube spill reduction valve to both ends of your carb and have some extra piece of mind that when something weird happens you’ve taken another step to keep yourself safe.
Additionally, if you are an off road guy that is at wonky angles all the time and deal with fuel spillage, these babies work wonders there as well. It isn’t just for the guys who win the “unintentional stunt driver of the weekend” award at their various races. Make these part of your program. You won’t regret it.
CHAD NOTE: I happen to know the guy who invented these and have seen them in action from the very first set of prototypes. I’ll have them on any carbureted car I drive. It’s amazing how simple they are to install, and they just work. Dead simple, nothing to break ever, and they are built right here in the USA. Right now, some sanctioning bodies don’t want to talk about them much because they are afraid that if they say they are good then they will be liable for admitting that a carburetor is dangerous without them. The are legal though to use on anything, and you should. Even if you don’t care about the added safety, there has to be someone that cares about you and does. Plus, your junk will cost a lot more to fix after it ALSO burns to the ground after flipping over.
HERE’S THE FULL RELEASE FROM HOLLEY:
Thank god for Holley!
How did they know I really needed a vent tube spill reduction valve?
This means I might even actually get my pants off before it’s all over next time I am enjoying the company of a luscious lady of the night!
Ph’narr ph’narr missus!
If the car is upside down the fuel must be dumped onto the underside of the air cleaner or hood.
I thought the gas fumes are the problem.
$103.95 a pair at Summit…..Yikes.
Yeah, I’m afraid I’m gonna have to say to Holley, “C’mon guys…” Rollover valves have been OE on fuel tanks for years, and this needs to be a $35 set not $100. I’m fine w/ that being the law though, it should always have been.