The Stovebolt Site Forums The Shop Area The HiPo Shop Any experience using a McCulloch blower?

Picked up a VS57 and need to set up an intake and carbs for it; does anyone have any experience using and/or setting up carbs/intakes for a McCulloch in a '57 235? I think I'm going to need a carb box and specially tuned carbs....


http://www.vs57.com/

Any experience using a McCulloch blower?

Nope, but I used their chainsaws quite a bit!! (sorry, I couldn't resist)
Scott

If you seal the whole carb in a box so the press around the carb is the same as the boost running through it or the system draws through the carb you don't need a special one if you are going to blow through it without the box around it then it takes a special carb.
Any shop that dose custom super charging or turbo shops should be able to help you out.

The 57 Ford 312 used a McCulloch supercharger with the carb in a pressure box. That was the engine that spooked Chevy into putting the 348 engine into the 58 model cars instead of using it in the medium-duty trucks like it was intended. The Fords were waxing the 57 Chevvies with their 283's on the drag strips. If the carburetor is installed on the inlet side of the blower, the fuel gets atomized better by running through the vanes on its way to the engine. Regardless of where the fuel gets into the airstream, the air is going to get a major temperature boost going through the supercharger, so an air-to-air aftercooler should be incorporated somewhere between the supercharger and the intake manifold.

The 1954 Kaiser Darrin used a supercharger with a flathead Continental inline six. It really improved the performance on that engine. Other than the gee-whiz factor of having a blown stovebolt, there are lots of better, simpler ways to get more performance out of your 235.
Jerry

I to am planning on putting a McCulloch VS57 on my 235 although I am going to fuel inject it also. I started working on the fuel injection today. The plan is to get the fuel injection working and tuned, then add the McCulloch later. According to my research the McCulloch VS57 only produces about 7 PSI max, so inter-cooling or after-cooling should not be an issue. I am running a Whipple Charger on my 99 GMC (5.3) @ 7.5 PSI without an inter-cooler for over 100k miles with no problems. Keep us posted on your progress.

Regardless of where the fuel gets into the airstream ... an air-to-air aftercooler should be incorporated somewhere between the supercharger and the intake manifold.

The term for an intercooler with air/fuel mixture in it (from a draw-through system) is "BOMB".

Only if you retard the ignition to the point of sparking up the intake tract. CAC's with fuel and air in them have been used for years on industrial gaseous fueled engines. Most propane or natural gas engines running a turbo have the mixer in front of the huffer and then run thru the After Cooler. Costs too much money to compress the 4psi vapor to 40 psi to do it the other way.