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Old 11-15-2012, 10:30 AM
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Paxton supercharger on carb`d 70 Mustang

A friend of mine put a Paxton on a 1971 Duster 340. He had quite a few problems with it. The box (new) kept leaking around the grommets where the linkage went through, the floats had to be replaced with fiberfill floats because the pressure crushed the brass floats, and the carb had to be rejetted very rich to handle the extra air when under boost so it was too rich when he was just cruising. Other than that, with 10.5:1 compression ration and boost limited to 5 psi, it ran great (almost as fast as my 1970 Duster 340 with a cam). All this was on 100 octane gas. My suggestion is to go to a junkyard and buy a 5.0 Mustang fuel injection setup. You'll avoid a lot of problems. My friend finally took the Paxton off because it was too much trouble to maintain the leaks and bad gas mileage.

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Old 11-15-2012, 12:02 PM
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this web site will help you with all ur needs and questions about blow thru carbs..

http://www.theturboforums.com/thread...BEFORE-POSTING


I'm running 12lbs of boost in my 68 mustang, engine is far from stock. Dont forget that you will need a bigger fuel pump & boost referenced. This site can teach you how to convert a holley into a blow thru carb. It's a chore to get the engine tuned, but i did mine all by myself.. and let me tell u.. its a fun ride when ur in boost.



i've been running this setup for about 2 years and its been trouble free and low maintance. Very dependable after you work all the bugs out.
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Old 11-15-2012, 01:07 PM
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Quote:
Originally Posted by 68dustin View Post
this web site will help you with all ur needs and questions about blow thru carbs..

http://www.theturboforums.com/thread...BEFORE-POSTING


I'm running 12lbs of boost in my 68 mustang, engine is far from stock. Dont forget that you will need a bigger fuel pump & boost referenced. This site can teach you how to convert a holley into a blow thru carb. It's a chore to get the engine tuned, but i did mine all by myself.. and let me tell u.. its a fun ride when ur in boost.



i've been running this setup for about 2 years and its been trouble free and low maintance. Very dependable after you work all the bugs out.
nice engine set up there !
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Old 11-15-2012, 06:23 PM
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I have been running a McCullough VS57 supercharger on a 340 horse 327 Chevy for about 5 years . In a
56 Studebaker Golden Hawk . The first thing I did was lower the compression to about 10 to 1 , I cut
the domes off the stock pistons to make them flat tops . Z28 hydraulic cam , I am using a highly modified
650 Holley double pumper in a blow thru application . The VS57 has a variable pulley . At normal speeds
it puts out about 2 lb pressure , it has a electronic kick down that opens the pulley and the pressure
goes to about 9 -10 pounds , this is adjustable . The fuel pressure problem was solved by using a stock
fuel pump and a electric pump set at 12 pounds . Under low pressure driving the stock pump gives it about 6
lbs of pressure , under high pressure the electric pump goes on with the electric kick down . A check valve
keeps the fuel from back feeding the electric pump and the stock pump phase one build in .
With a Muncie M21 and 4.56 gears it a fun ride .....
With a Paxton the box is the easiest way to go
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