Cliff's Quadrajet Parts and Rebuild Kits
General Category => Quadrajet Carb Talk and Tips => Topic started by: 70 1/2 TA on March 29, 2016, 03:22:02 PM
-
Where can one find true examples of certain carbs (such as Pontiac 7040270 & 7040273) to be able to use as an example to learn different casting marks and part numbers so not to get stuck with a restamp. Are there any good reference articles on different markings for Pontiac, Chevy, Olds, Ford etc. I am still looking for a Pontiac 7040270 & 7040273, have found a few but just afraid to pull trigger due to so many restamps or not getting enough pics from ones selling these carbs to see all the casting marks on their carbs. Thanks for any info anyone can provide.
-
I WOULD TRY TO GET A NICE CLEAR PICTURE OF THE STAMP TO CLIFF FOR VERIFICATION. THERE ARE ALSO NUMBERS ON THE BASEPLATE AND AIRHORN THAT HAVE TO MATCH, I THINK. WHAT THEY CALL A PLANT CODE IS ACTUALLY SOMETHING ELSE, LIKE AN INSPECTORS STAMP MAYBE, BUT NOBODY SEEMS TO HAVE A LIST OF ALL THE CODES. THE PONTIAC RAM AIR CARBS MAY HAVE THEIR OWN SPECIFIC CODE. PRICES ARE OUT OF THE BALL PARK ON DATE CODED ORIGIONAL CARBS, EVEN THE RESTAMPS ARE SELLING HIGH. BE CAREFUL, GOOD LUCK.
-
Good topic and questions. I don't mind taking a look at adds on Ebay and other sources for folks who are buying expensive carburetors to verify that they are real.
At this time most of them are fakes/restamps, so don't drop the hammer on one unless you have someone verify that it is the real deal.
There is also the "bait and switch" thing, where the seller shows pics of a real one, then sends a fake after the purchase is complete.
We get a LOT of restamped Pontiac Ram Air carburetors sent to the shop, and I have to tell the seller that they have just spent a lot of money on a carb that isn't the real thing.
There are a lot of indicators that a valuable carburetor isn't real. First look at the price they are asking, most are WAY under what the market will bring on one. Second, if the listing is running and no one is buying it, and the price is pretty low, rest assured it's most likely a fake.
Something else to mention here is that there are a lot of Service Replacement Ram Air carburetors out there, most were part numbers 7028276, 7029270, and 7040270. They will have Julian Dates much later than the model year run in almost all cases, and they will NOT have a Plant Code after the number.
The did NOT make Service Replacement manual transmission units, so a BIG flag should go up if you see a manual transmission Ram Air carb for sale with a later build date on it.
Carter didn't make any either, so stay far away from a Carter casting stamped with a Ram Air part number.
If you are looking at a carb for sale, and want me to take a look at it, send an email message to the shop and we'll respond so you can send us some pictures or a link to the add.......Cliff
-
Good topic and questions. I don't mind taking a look at adds on Ebay and other sources for folks who are buying expensive carburetors to verify that they are real.
At this time most of them are fakes/restamps, so don't drop the hammer on one unless you have someone verify that it is the real deal.
There is also the "bait and switch" thing, where the seller shows pics of a real one, then sends a fake after the purchase is complete.
We get a LOT of restamped Pontiac Ram Air carburetors sent to the shop, and I have to tell the seller that they have just spent a lot of money on a carb that isn't the real thing.
There are a lot of indicators that a valuable carburetor isn't real. First look at the price they are asking, most are WAY under what the market will bring on one. Second, if the listing is running and no one is buying it, and the price is pretty low, rest assured it's most likely a fake.
Something else to mention here is that there are a lot of Service Replacement Ram Air carburetors out there, most were part numbers 7028276, 7029270, and 7040270. They will have Julian Dates much later than the model year run in almost all cases, and they will NOT have a Plant Code after the number.
The did NOT make Service Replacement manual transmission units, so a BIG flag should go up if you see a manual transmission Ram Air carb for sale with a later build date on it.
Carter didn't make any either, so stay far away from a Carter casting stamped with a Ram Air part number.
If you are looking at a carb for sale, and want me to take a look at it, send an email message to the shop and we'll respond so you can send us some pictures or a link to the add.......Cliff
I agree. A lot of re-stamps out there. Sadly, for the money. Just post a good, visible photo and we will look at it. I am no expert by any means. Cliff is, but I do know a little, too. ;)
-
Hopefully I downloaded pics correctly. Here's what I have on the 270 carb, I notice what appears to be a double stamp on the 0. Let me know what y'all think, and thanks for the help
-
More photos
-
More pics
-
Pics
-
Pics
-
Another pic
-
Last pic
-
LOOKS LIKE AN OBVIOUS RESTAMP TO ME. I'VE NEVER SEEN ANY HINT OF DOUBLE STAMPING ON A REAL FACTORY STAMPED CARB. I WOULDN'T TOUCH IT.
-
A much better pic of the part number would help, and a pick of the accl pump well where the rubber boot metal retainer is at......Cliff
-
Let me know if you bis is good enough pic
-
Let me know if this pic is good enough
-
Here's another one
-
Here's another one if it's any better. I'll try to get ACC. Pump boot pic for you as well
-
Here's another pic of #. I'll try to get the acc. boot pic as well
-
Cliff, it is on eBay.
To the poster, try contacting the owner this carb for better photos. 8)
-
I was going to help by posting a link, but I couldn't find the listing in question.
-
Here it is:
http://www.ebay.com/itm/1970-7040270-Ram-Air-GTO-Trans-Am-automatic-Rochester-Quadrajet-Carburetor-/111447910199
-
I have sent him an email requesting more pics, hope to get them soon. I've been in contact with him since before he posted it on eBay so hopefully can get new pics to here so can see it before its gone. Thanks for all yalls he
-
Better pic of Carb # an date
-
Accelerator pump pic
-
Another pic acc. pump rubber
-
Looks like maybe the last digit might have been originally a different number, than the "0"?
-
I'd say re-stamp. Aren't the numbers supposed to be in line? the 7 & 0 look higher than the rest. date code looks tampered with as well.
What was the purpose of the rubber boot on the ram-air carbs?
-
I'd say re-stamp. Aren't the numbers supposed to be in line? the 7 & 0 look higher than the rest. date code looks tampered with as well.
What was the purpose of the rubber boot on the ram-air carbs?
Common misconception. Just because the numbers were re-stamped, doesn't mean it is a "bad" or "dirty" carburetor. From the factory, when they stamped it, sometimes they didn't stamp hard enough. Also, the date stamp looks fine.
Cliff knows more on the rubber boot.....
-
I've heard several theories about the rubber boot on the Ram Air units, and Pontiac Ram Air carburetors were the only carbs to use that set-up even though cheap over the counter kits come with the wrong pumps and the rubber boots and retaining ring for non-Ram Air units. Well they used to, but those parts are all now discontinued. If anyone has any rubber boots and retainers, contact the shop we are buying them.
One thing it does for sure is reduce wear in the airhorn where the pump shaft travels thru it. Almost all Ram Air carbs that we build are super-tight on the pump at that area, compared to all others which usually have some clearance there from wear.
For sure the boot and retainer seal off that area, maybe the engineers knew something we didn't about having "Ram Air" on those engines and thought it might put a slight amount of pressure in the bowl and they didn't want any seepage around the accl pump shaft? I can assure everyone reading this that Ram Air systems do NOT pressurize the bowl of the carburetor or cause a leak there, been running a real Shaker assembly on my engine for decades with zero issues in that area....Cliff
-
Common misconception. Just because the numbers were re-stamped, doesn't mean it is a "bad" or "dirty" carburetor. From the factory, when they stamped it, sometimes they didn't stamp hard enough. Also, the date stamp looks fine.
Cliff knows more on the rubber boot.....
Ethan, You lost me on that one. Are you saying re-stamping was done at the factory? Example, If someone does a re-stamp on a Bonneville carb and then tries to pass it off as a Ram-air carb then that's wrong.
Cliff, Do you get any of these "correct" & high dollar carbs from e-bay and where ever in your shop? I would hope for 2 grand they should be spot on and not a butchered mess like the re-man units.
-
Ethan, You lost me on that one. Are you saying re-stamping was done at the factory? Example, If someone does a re-stamp on a Bonneville carb and then tries to pass it off as a Ram-air carb then that's wrong.
Cliff, Do you get any of these "correct" & high dollar carbs from e-bay and where ever in your shop? I would hope for 2 grand they should be spot on and not a butchered mess like the re-man units.
No, I am saying the re-stamp was done by the rebuilder. Like I said, each stamp was done one at a time. Nothing was perfect and if the person stamping it was slightly off, the indention of the number wouldn't be so good. And of course, how corroded or dirty was the carb, before it was cleaned as well. Which also, could have ate away at the casting. It was definitely re-stamped, like you said, but I am not entirely sure it is misrepresented. Though, I can be wrong. I am not perfect by any means. :(
-
I gotcha now, A re-stamp of the original numbers. I wasn't aware this was done. Although I would think that a original, hard to read worn number would be better than a re-stamp. This would indicate all original and less likely to question. I know I'm not perfect by any means either....
-
I gotcha now, A re-stamp of the original numbers. I wasn't aware this was done. Although I would think that a original, hard to read worn number would be better than a re-stamp. This would indicate all original and less likely to question. I know I'm not perfect by any means either....
I agree. I would leave the worn numbers alone as well. At least, it would make it more clearer to the buyer, of how it is being represented.
-
"Cliff, Do you get any of these "correct" & high dollar carbs from e-bay and where ever in your shop? I would hope for 2 grand they should be spot on and not a butchered mess like the re-man units."
I get a LOT of "high dollar" carbs sent here, but most of the stuff from Ebay are re-stamps. Sellers also do the "bait and switch" thing, where they show you a real Ram Air part number then send a re-stamp. LOTS of shady stuff going on there.
You also have to read the adds VERY CLOSELY. Sellers of Ram Air and other high dollar Q-jets have tricky wording in their adds and are actually telling you that the carb isn't the real deal, but built to be the real deal from something else.
Buyers should also be aware that they made a LOT of Ram Air Service Replacement carburetors, part numbers 7028276, 7029270 and 7040270. They will NOT have a Plant Code after the number and later Julian Date. They also don't fetch the big money that original dated units do.
They also did NOT make the manual transmission Ram Air carburetors as Service Replacement, so if it's for a manual trans Ram Air and dated later than the model year, it's going to be a restamp.
I would advise anyone who is looking to purchase a very expensive Q-jet to to post a link to the add or send a link to my email and I'll gladly take a look at it BEFORE you buy it.
Also be aware the most of the nice/shiny q-jets for sale on Ebay and NOT going to work well right out of the box. We get hundreds of them sent here when the new buyer finds out that they are full of crappy parts and poorly calibrated. This happens because a high percentage of them are built from miss-matched parts, and they get cheap kits installed in them from Pep Boys or Autozone, so doomed from the very start.......Cliff