1972 Mach 1 Carb Replacement
10-22-2008, 06:40 AM
#11
5th Gear Member
Join Date: Nov 2006
Location:
Posts: 2,106
Why not buy a Spreadbore? On the 429 Cobra Jet's in 71, the Rochester spreadbore carbs carried a GM part number, so you may have to look for a Spreadbore that fits a Chrysler or Chevy, insted of a Ford. You can call the Tech line at Summit or Jegs to make sure it fits.
10-22-2008, 10:15 AM
#12
3rd Gear Member
Join Date: Aug 2006
Location: North East Texas on the Red River
Posts: 886
The Rochester "Spreadbore" was not called a "Spreadbore" it was called a Quadrajet.
If Holley still makes the Spreadbore, I'm sure there will be a specific listing for this application.
If Holley still makes the Spreadbore, I'm sure there will be a specific listing for this application.
10-22-2008, 10:36 AM
#13
2nd Gear Member
Join Date: Sep 2008
Location: The garage (near SF bay- Calif)
Posts: 469
A few years ago you could still buy Carter carburetors while Edelbrock had been making them for a long time. I don't know if Carter is still in business and just sold the rights to the AFB or what.
I'm not really a fan of either one. There are some good features about them, but the problem with them is that the metering pistons and bores wear out. Unless Edelbrock has put in some sort of steel liner and used different material for pistons, then they are still prone to wearing out.
I thought many years ago that it would be a really good idea to line those metering piston bores with some long lasting material. At least the pistons can be easily changed if they wear out.
Unless the wear factor of those metering piston bores has been addressed, I don't consider the AFB, either Carter or Edelbrock, to be worth a bucket full of cold spit. I suppose if you were putting them on a car that you only drove to car shows and such it would be alright, but for long term use, they won't cut it.
I'm not really a fan of either one. There are some good features about them, but the problem with them is that the metering pistons and bores wear out. Unless Edelbrock has put in some sort of steel liner and used different material for pistons, then they are still prone to wearing out.
I thought many years ago that it would be a really good idea to line those metering piston bores with some long lasting material. At least the pistons can be easily changed if they wear out.
Unless the wear factor of those metering piston bores has been addressed, I don't consider the AFB, either Carter or Edelbrock, to be worth a bucket full of cold spit. I suppose if you were putting them on a car that you only drove to car shows and such it would be alright, but for long term use, they won't cut it.
This 2007 Edelbrock Performer has been running perfect for about a year now, mostly driving it hard about 1 or 2 times a week. Who can afford to drive these gas hogs more than that? They must have updated the design
to run on the modern gas. The origional Autolite was rebuilt and I had nothing but problems after about 6 months.
10-22-2008, 11:31 AM
#14
3rd Gear Member
Join Date: Aug 2006
Location: North East Texas on the Red River
Posts: 886
Unless Edelbrock has addressed the wear problem in the metering cylinders, you will eventually have the same problem that we saw in the sixties/seventies with the Carters. They work fine in the beginning, but once they wear out those cylinders, the pistons won't come down as they should causing a constant rich condition.
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1971, 1972, 72, carb, carborator, carburator, carburetor, factory, hood, mach, mach1, mustang, number, quadrajet, rebuild, replacements, rochester
