The original Carter pieces are quality the FM not so much.
They've always sucked and you cannot tell anyone that. They don't listen.It’s not so much that, because I love doing that work. But getting it to fit correctly on these manifolds is the chore.
I don’t want to carve up the manifolds, and I’ve already tested a couple of the adapters and they suck.
Check the calibration and the IFR's should be in the area of 28-31 and the emulsion package should be rows of very small holes evenly spaced all the way down the tube.I agree. I’m pretty sure (abut not 100%) it’s not a FM piece.
Check the calibration and the IFR's should be in the area of 28-31 and the emulsion package should be rows of very small holes evenly spaced all the way down the tube.
Also FM went to a die cast design where the Carter was cast
That looks to be an early Carter.
Almost positive the competition series were all Carter, not Federal Mogul. I have two of the no-choke comp series 750s on my max xram.
Is the number stamped on the foot of the carb 4760?Almost positive the competition series were all Carter, not Federal Mogul. I have two of the no-choke comp series 750s on my max xram.
I couldn't tell you. They are 250 miles away at the moment. I have a pic of the xram, but not anywhere near enough to read anything on the carb.Is the number stamped on the foot of the carb 4760?
I have some very early ones without any numbers stamped on them also. The earlier correct 750's have a primary boost that is longer and places it at the correct height of the vena contractor so they flow.I couldn't tell you. They are 250 miles away at the moment. I have a pic of the xram, but not anywhere near enough to read anything on the carb.
I have a pair of 3705s too, but there is literally NO numbers on them anywhere.
According to info I found , the chokeless 750 comp series should be 4762.
The carb in post #55 is an original Competition Series AFB, model # 4759, 625 cfm.
For reasons known only to Carter, they introduced another lot of 'Competition series' AFBs in the emissions era which were not the same & had different jetting.
#4758 to 4762 were five comp series, from 500 to 750 cfm.
The 4759 came with 095 pri jets 086, #606 rods [ 061/071 & had no choke.
What is odd & might explain the power difference is the sec jets. The only difference between the 625 & 750 is the smaller primaries of the 625. Secs are the same & same boosters, but the 750 has 092 or 095 sec jets, depending on whether it has a choke.
NBT,
I think it is the date code. Carter 4bbls generally were sequential with their numbering system. That jetting info I listed earlier comes from a 1971 Street & Strip annual that I have kept all these years, so I believe that those Comp Series would have been fairly new at that time.
Long boosters. Carter made 505 versions of the AFB, majority were production carbs. Some had long boosters, some had short boosters; some had the the booster leg pointing upwards, some had the leg pointing downwards. The up/down location of the venturi restriction was adjusted accordingly. Each carb was essentially custom designed for each engine. One of the sales 'features' of the Edel AFBs is the bullet nose on the pri booster nozzle. The Carter AFB on my 66 GTO had those.....
I would imagine your carb went to a Class Racer Carb specialist for rebuild?I think it depends on who has worked on your Carter carbs,
August 1984 I think. I was still driving chevies in '74.Nice early carb.
Brad van LantWouldn't have been Steve Wann that did your AFB by any chance?