1966 Plymouth Barracuda Formula S - Restoration
While waiting on gauge/dash parts to come in (getting going on that this weekend), I started working on the original Carter AFB 4121S carb. The carb was pretty filthy and the fast idle didn't seem to be working correctly. Reason enough to get a rebuild kit and go through it. It still had the 4121S tag and the green CAP tag on it. The green CAP tag broke removing it, but the original tag is still in tact. It doesn't really matter though, the carb casting has the 4121S on it, and I'm not going for concours.
It has the CAP (clean air package), I'm guessing because it originated from California. The only thing I've been able to find that was different on the CAP carbs was the idle screws were supposed to be non-removable, the float level is a little deeper, and the fast idle seems higher than the non CAP. I dont understand the fast idle difference from the carter adjustment charts. The non CAP shows 625rpm fast idle (600rpm normal) on the low step of the fast idle cam and the CAP shows 1600rpm on the 2nd highest. Seems like fast idle on a CAP car would burn more fuel, but if anyone has ideas, I'm all ears. I could speculate, but it probably doesn't really matter.
I gave it a soak in some old berrymans (and subsequently ended up spilling most of the good stuff being clumsy), rinsed it, then soda blasted the body and internals. I soaked all of the steel parts in a cheap harbor freight ultrasonic cleaner with evapo-rust. The brass parts got polished and cleaned with some fine steel wool. Its turned out pretty clean - the internals weren't terrible, but all of the linkages move very freely and I know it's clean.
I still have to get the rest of the linkages and externals reattached - that comes this weekend, along with working on the gauges and dash. I got an IVR from RTE and I'll neuter the dead limiter in the gas gauge. I plan on repainting the needles with some testors orange model paint and I may throw a coat of spray chrome on. Maybe someday I'll have the plastic re-vacuum plated, but for now a coat of spray will clean it up enough. Don't want the dash to look too good until the rest of the car matches it.
While waiting on gauge/dash parts to come in (getting going on that this weekend), I started working on the original Carter AFB 4121S carb. The carb was pretty filthy and the fast idle didn't seem to be working correctly. Reason enough to get a rebuild kit and go through it. It still had the 4121S tag and the green CAP tag on it. The green CAP tag broke removing it, but the original tag is still in tact. It doesn't really matter though, the carb casting has the 4121S on it, and I'm not going for concours.
It has the CAP (clean air package), I'm guessing because it originated from California. The only thing I've been able to find that was different on the CAP carbs was the idle screws were supposed to be non-removable, the float level is a little deeper, and the fast idle seems higher than the non CAP. I dont understand the fast idle difference from the carter adjustment charts. The non CAP shows 625rpm fast idle (600rpm normal) on the low step of the fast idle cam and the CAP shows 1600rpm on the 2nd highest. Seems like fast idle on a CAP car would burn more fuel, but if anyone has ideas, I'm all ears. I could speculate, but it probably doesn't really matter.
I gave it a soak in some old berrymans (and subsequently ended up spilling most of the good stuff being clumsy), rinsed it, then soda blasted the body and internals. I soaked all of the steel parts in a cheap harbor freight ultrasonic cleaner with evapo-rust. The brass parts got polished and cleaned with some fine steel wool. Its turned out pretty clean - the internals weren't terrible, but all of the linkages move very freely and I know it's clean.
I still have to get the rest of the linkages and externals reattached - that comes this weekend, along with working on the gauges and dash. I got an IVR from RTE and I'll neuter the dead limiter in the gas gauge. I plan on repainting the needles with some testors orange model paint and I may throw a coat of spray chrome on. Maybe someday I'll have the plastic re-vacuum plated, but for now a coat of spray will clean it up enough. Don't want the dash to look too good until the rest of the car matches it.
