1980 - 1986 Bullnose F100, F150 & Larger F-Series TrucksDiscuss the Early Eighties Bullnose Ford Truck
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I think I have an aftermarket cat converter. Since the emissions equipment is already gone off my truck and I have an edelbrock carb the cat is pretty much useless. For all I know too it might be original and clogged up. Is there any benefit to gutting the cat even it its not "clogged"???
I just don't want to get into gutting it and run into problems with the exhaust. Exhaust work always seems to be a can of worms to me. You touch one thing and it becomes a major project. Maybe its just me but rusty pipe never goes over well.
'96 F-250 XLT 4x4 Supercab 7.3 Powerstroke; my immaculately clean truck w/ 175,000+ miles
'84 F-150 XLT 4x4 Reg Cab - 302 Gasser (the work beater)
'98 Volkswagen Jetta TDI - my 50 mpg (that's not a typo) commuter car!
If the cat isn't clogged, I would see no benefit in messing with the catalytic converter. If it is clogged, you should replace it with a high flow aftermarket unit. Cats were required after 74, and if your vehicle came with one, federal law requires it be present to be street legal.
1986 F150 4x2 SWB, down for restoration.
408 Stroker, Edelbrock top end, FAST EZ EFI, DJM Dream Beams, 4-link coilover rear suspension, Ford 8.8 diff, 3.55 gears, Eaton posi....
A work in progress. http://www.ford-trucks.com/forums/11...-el-guapo.html
The truck is not street legal now, since all the emission parts, except the cats have been removed, and...
First cats were installed in 1975, but not all trucks came with them, as it depended on the series, individual states emission laws, GVWR's. CA yes in some cases, other states, I dunno.
If the muffler is clogged up (not the cat, as they usually don't clog up), you will know it, unless you are deaf.
Peeps in the 1970's removed the restrictors in fuel filler tubes that only gas station unleaded fuel nozzles would fit into. Back then there were two sizes of nozzles, leaded fuel nozzles ware larger in diameter.
They then assumed they could use leaded fuel. Fine and dandy unless cat converters were present. The lead in the fuel melted the charcoal in the cats, shoved it into the muffler.
Before too long, their vehicles sounded like vacuum cleaners headin' on down the road.
Bill / Retired Ford Parts Manager / SoCal Chapter Member / Part number research: 1928/2001 trucks & 1928/89 passenger cars.
Cats can become restricted when they melt a bit, mostly due to improper fueling. They don't always break up and pass through the exhaust, may times they simply melt, which closes the passages in the ceramic structure. As far as legality goes, if the original emissions equipment was not maintained on the motor, the cat is a moot point, and may have melted due to improper fueling and lack air injection of the emissions system.
the workhorse:86 F250 4x4 6.9 Diesel 4-spd, 4.10 axles
the other workhorse 92 F350 2wd crew cab,3.55 rear axle, 92 6bt Cummins, NV4500
the project: 78 F150 4x4 shortbed 351 auto Iowa Chapter leader, ASE certified parts specialist
Come on down and join us in the Iowa chapter, or your own local chapter!! Thanks, Roger
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