PAXTON SUPERCHARGER ?

[RabidScott]

Now I see flow through on carbs, why doesn't the positive pressure push the fuel back into the carb?

On my roadster I simply ran a boost referenced fuel pressure regulator and an auxiliary high pressure electric fuel pump and that kept the fuel pressure above the manifold pressure. It was a dead simple system that saw no more than 8 PSI though.

All said and done the simplicity of a centrifugal supercharger makes them incredibly appealing, especially since you can run them carbureted without any engine management systems. I mean if you just want to add 40-50% HP for extra fun driving experience it's pretty easy to do.

 

[TT5.9mag]

Hijack in progress....

Back in the day the entire carb had to be in a presurized enclosure to use a paxton supercharger.(something about the pressure in the bores needing to be = to the pressure on the float bowls or something like that) Now I see flow through on carbs, why doesn't the positive pressure push the fuel back into the carb?

Hijack over.....

Thanks

Mostly that was due to leakage around the throttle shafts and choke linkage and stuff like that. Blow through carbs are much better now.

 

[Dana67Dart]

On my roadster I simply ran a boost referenced fuel pressure regulator and an auxiliary high pressure electric fuel pump and that kept the fuel pressure above the manifold pressure

Without a paxton our fuel bowels are at ambient air pressure which is what pushes the fuel into the manifold (manifold lower pressure than ambient)

Pressurizing the manifold with paxton wouldn't you need to pressurize the fuel bowls too?

 

[RabidScott]

Pressurizing the manifold with paxton wouldn't you need to pressurize the fuel bowls too?

Sorry, by manifold I meant anything on the output side of the blower, under the carb hat, inside the carb, etc. The pressurized side of things.

Since the carb vents are under the carb hat the float bowls are subject to the same pressure. As the butterflies open they pull the fuel into the engine, you just need to ensure the fuel pressure is greater than the air pressure to keep the bowls full of go juice.

 

[TT5.9mag]

Without a paxton our fuel bowels are at ambient air pressure which is what pushes the fuel into the manifold (manifold lower pressure than ambient)

Pressurizing the manifold with paxton wouldn't you need to pressurize the fuel bowls too?

No, you just have to keep the fuel pressure above boost pressure. Which is why you have to boost reference a pressure regulator. If you have 7 psi of boost and 7 psi of fuel pressure you have zero fuel flow.

 

[TT5.9mag]

and you need the solid plastic floats to keep them from crushing.

 

[RabidScott]

Here's a fun article about Mr Norm's Paxton supercharged Dodge Demon. Always loved this car!

https://www.hemmings.com/stories/article/mr-norms-supercharged-demon

 

[fastnos]

There are a few ads on EBay right now..... just sayin.

 

[Garys72Duster]

I had a 440 Dart with a Novi 2000 on it. Worked great. Lots of torque and power. Had to have an an electric fuel pump and a regulator. I think the pump pressure was set at 8 lbs, as was the boost. The pressure drop in the venturis was enough to pull the fuel into the airstream. Seems like jet size had to be moved up 2 to 4 steps on the 750 dbl pumper. The alternator had to be relocated below the blower, which was no fun. Took the blower off, and sold the complete set up to a guy on this forum. $1500.

 

[67Dart273]

I put a Paxton VS57/SN60 hybrid on a Chevy 283 in a '31 Ford, it hauled balls!!

View attachment 1715605177

Yeh, but those damn gravity feed gas tanks LOLOL

 

[RustyRatRod]

I do find it curious that everybody's stories start out with "I HAD a......." I wonder why people get rid of them.

 

[j par]

I do find it curious that everybody's stories start out with "I HAD a......." I wonder why people get rid of them.

That's a good question. I know I have my nitrous and I haven't even used it yet, but when I want to it's there. I don't see any reason why I would get rid of it it doesn't do anyting when I'm not using it...

 

[Garys72Duster]

I do find it curious that everybody's stories start out with "I HAD a......." I wonder why people get rid of them.

In my case, with the big 440 under the hood of that 70 Dart, add headers and the blower, just too much under there. Also had an auto spark retard. I opted for the simpler,, basic 440. Spark plugs and alt were hard to get to.. That 440 ran pretty good in stock form.

 

[RustyRatRod]

That's a good question. I know I have my nitrous and I haven't even used it yet, but when I want to it's there. I don't see any reason why I would get rid of it it doesn't do anyting when I'm not using it...

Superchargers of any kind......turbos are also superchargers...make an engine very efficient. More power and as long as they're driven with respect to the go pedal, more average mileage than a naturally aspirated engine......so that's why I asked. It seems if they are so great people would hold on to them. I just scratch my head.

 

[RustyRatRod]

In my case, with the big 440 under the hood of that 70 Dart, add headers and the blower, just too much under there. Also had an auto spark retard. I opted for the simpler,, basic 440. Spark plugs were hard to get to.. That 440 ran pretty good in stock form.

Now I can understand that. Plug access in a N/A big block A body is difficult at best, much less with "all that" piled on top of it.

 

[RabidScott]

I do find it curious that everybody's stories start out with "I HAD a......." I wonder why people get rid of them.

I took it off because I sold the car. Still have it and it's waiting to go onto the next car (1929 Ford roadster) after I get it running, driving and work out all the bugs.

I also picked up a Paxton setup for a flathead Ford because these little engines need all the help they can get. This one is going into a 1953/1954 time period '32 Ford roadster hot rod.

I have a 6-71 setup for the 440 in the Challenger if I ever get around to it with all these other projects. I have a rock stock '72 motorhome 440 with six pack guts I'm going to test the pressure capabilities of... muhahahahah.....

 

[TT5.9mag]

I do find it curious that everybody's stories start out with "I HAD a......." I wonder why people get rid of them.

My story’s about superchargers start that way because they aren’t worth the hassle. IMO. But every single turbocharger I’ve bought I still have because they are.

 

[RustyRatRod]

I took it off because I sold the car. Still have it and it's waiting to go onto the next car (1929 Ford roadster) after I get it running, driving and work out all the bugs. View attachment 1715612162

View attachment 1715612163



I also picked up a Paxton setup for a flathead Ford because these little engines need all the help they can get. This one is going into a 1953/1954 time period '32 Ford roadster hot rod.

View attachment 1715612164

I have a 6-71 setup for the 440 in the Challenger if I ever get around to it with all these other projects. I have a rock stock '72 motorhome 440 with six pack guts I'm going to test the pressure capabilities of... muhahahahah..... View attachment 1715612166

Those are pudry cool, man!