1974 Carb Help Wanted
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1974 Carb Help Wanted
Hello,
I have to replace the carb on my 1974 L-48 car. The car is all original except for the carb. It currently has a 1972 Olds carb on it and I was hoping to get the correct id carb for the car. The suffix code for the engine is V1017CLA. Any help to guide me for the proper carb id would be appreciated.
Steve
I have to replace the carb on my 1974 L-48 car. The car is all original except for the carb. It currently has a 1972 Olds carb on it and I was hoping to get the correct id carb for the car. The suffix code for the engine is V1017CLA. Any help to guide me for the proper carb id would be appreciated.
Steve
Melting Slicks
Joined: Oct 2006
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From: Texas
they are around but pricey.... probably would need to send it to Lars for complete going through...
http://www.ebay.com/itm/1974-Corvette-7044206-Used-Rochester-Q-Jet-w-Auto-Trans-Dated-E4-FA-/131408073911?pt=Motors_Car_Truck_Parts_Accessories&hash=item1e988814b7&vxp=mtr
http://www.ebay.com/itm/1974-Corvette-7044206-Used-Rochester-Q-Jet-w-Auto-Trans-Dated-E4-FA-/131408073911?pt=Motors_Car_Truck_Parts_Accessories&hash=item1e988814b7&vxp=mtr
Thread Starter
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Joined: Dec 2014
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Hello,
I have to replace the carb on my 1974 L-48 car. The car is all original except for the carb. It currently has a 1972 Olds carb on it and I was hoping to get the correct id carb for the car. The suffix code for the engine is V1017CLA. Any help to guide me for the proper carb id would be appreciated.
Steve
I have to replace the carb on my 1974 L-48 car. The car is all original except for the carb. It currently has a 1972 Olds carb on it and I was hoping to get the correct id carb for the car. The suffix code for the engine is V1017CLA. Any help to guide me for the proper carb id would be appreciated.
Steve
What date code for the carb would be deemed correct based on the engine suffix code dating?
Steve
Drifting
Joined: Oct 2005
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From: Forth Worth TX
If the carb was part of the engine assembly, any date that preceeds 10/17/73 will work, but a carb dated within that same week would be unlikely to have been installed. I would look for a date of early Oct. or earlier.
Last edited by Revi; Jan 26, 2015 at 12:17 PM.
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Your engine was completed on Oct. 17, 1973. When was your car completed? Build date on Trim Tag? I'm not sure if completed engines included the carb or if the carb was installed at St. Louis?
If the carb was part of the engine assembly, any date that preceeds 10/17/73 will work, but a carb dated within that same week would be unlikely to have been installed. I would look for a date of early Oct. or earlier.
If the carb was part of the engine assembly, any date that preceeds 10/17/73 will work, but a carb dated within that same week would be unlikely to have been installed. I would look for a date of early Oct. or earlier.
Race Director
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A carb dated 2-6 weeks before car assembly date would be typical.
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From: Crossville TN
If you need the exact carb for official judging reasons, begin the search. Otherwise, most of the pre-'76 Q-Jets were very similar (even across car brands), and they can be adapted to meet the needs of about any engine. That was the beauty of the Q-Jet...you could put it on anything.
If your existing carb is functional, you might want to send an e-mail to Lars (Grimsrud) at V8FastCars@msn.com. Ask him if he would be willing to adapt the Q-Jet you have (give him the carb part number) to work on your present car (include info on engine modifications, trans, rear gear, if the car is not stock). His prices are very reasonable and the carb will be just as functional as the original carb would have been...but likely operate better than one from the factory.
If your existing carb is functional, you might want to send an e-mail to Lars (Grimsrud) at V8FastCars@msn.com. Ask him if he would be willing to adapt the Q-Jet you have (give him the carb part number) to work on your present car (include info on engine modifications, trans, rear gear, if the car is not stock). His prices are very reasonable and the carb will be just as functional as the original carb would have been...but likely operate better than one from the factory.
Race Director
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From: San Jose CA
If you need the exact carb for official judging reasons, begin the search. Otherwise, most of the pre-'76 Q-Jets were very similar (even across car brands), and they can be adapted to meet the needs of about any engine. That was the beauty of the Q-Jet...you could put it on anything.
If your existing carb is functional, you might want to send an e-mail to Lars (Grimsrud) at V8FastCars@msn.com. Ask him if he would be willing to adapt the Q-Jet you have (give him the carb part number) to work on your present car (include info on engine modifications, trans, rear gear, if the car is not stock). His prices are very reasonable and the carb will be just as functional as the original carb would have been...but likely operate better than one from the factory.
If your existing carb is functional, you might want to send an e-mail to Lars (Grimsrud) at V8FastCars@msn.com. Ask him if he would be willing to adapt the Q-Jet you have (give him the carb part number) to work on your present car (include info on engine modifications, trans, rear gear, if the car is not stock). His prices are very reasonable and the carb will be just as functional as the original carb would have been...but likely operate better than one from the factory.
A well-built QuadraJet is a good thing. Unless you get a carburetor that has the correct casting number and a believable date code, you really won't be much ahead of where you are now. Presumably, whoever put the 72 Olds carb on there did a fair bit of work to make it run right. BOP carbs had a front facing fuel inlet, so I expect you have a 90* fitting coming out to get the correct fitment with your carb. Going back to a Chevy carb may necessitate new fuel lines as well. Olds throttle linkage would have been different as well, without seeing your carb I can't presume how they would have modified it but they may have swapped a Chevy throttle shaft onto that carburetor.
Last year, I built a 79 Olds carburetor to go on a 67 Pontiac 400 - I had to swap to a different throttle shaft to make that work out with the Pontiac linkage. Luckily, there was a company that makes new throttle shafts specifically for converting.
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Thread Starter
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A well-built QuadraJet is a good thing. Unless you get a carburetor that has the correct casting number and a believable date code, you really won't be much ahead of where you are now. Presumably, whoever put the 72 Olds carb on there did a fair bit of work to make it run right. BOP carbs had a front facing fuel inlet, so I expect you have a 90* fitting coming out to get the correct fitment with your carb. Going back to a Chevy carb may necessitate new fuel lines as well. Olds throttle linkage would have been different as well, without seeing your carb I can't presume how they would have modified it but they may have swapped a Chevy throttle shaft onto that carburetor.
Last year, I built a 79 Olds carburetor to go on a 67 Pontiac 400 - I had to swap to a different throttle shaft to make that work out with the Pontiac linkage. Luckily, there was a company that makes new throttle shafts specifically for converting.
Steve
Team Owner
Joined: Aug 1999
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From: Ontario
Thanks for the note! Yes they swapped out a BOP fuel line for the centre inlet. Today I located the correct carb locally (off an 74 L-48 auto car). I missed by 1 month for it to be the correct carb for judging purposes (needed a Oct and the carb is a Nov). I am happy to get one this close.
Steve
Steve
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Steve
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From: Ontario
Thanks Paul! I have a 72 coupe and bought this 74 a week ago, I am actually really liking this car…My thoughts were to drive it for a while and possibly sell it, however I may keep it. It is all original except for the carb that was swapped. Where you in Ontario? I am west of the GTA.
Steve
Steve
The carb? Heck, I have three. The pretty one I posted is not quite right although being completely done over by a professional. I may work on that one in the spring.
Melting Slicks
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This pic will tell you where I am. It was taken last May at a show. Believe it or not I drove there in +8C weather in pouring rain with the top up. Then the prep for the show took a bit of time, as you can imagine. But yes, the Zaino finish helped with the clean-up.
The carb? Heck, I have three. The pretty one I posted is not quite right although being completely done over by a professional. I may work on that one in the spring.
The carb? Heck, I have three. The pretty one I posted is not quite right although being completely done over by a professional. I may work on that one in the spring.
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From: San Jose CA
I have... 1 4M, 4 or 5 M4Ms and 2 E4Ms at my house.
1 of the M4Ms is usable (on the car) and 1 is nearly usable (just needs to have upper and lower gaskets installed, choke pull off, links and tuned
).
The 4MV is pretty much junk. I've stripped it to nothing and learned how to plate on it. I know I've scavenged a few parts off of it, but it could probably be built back up. It's a 79 truck carb, though, so it's pretty much not worth any effort. Although, some of the parts are fairly pretty.
All of the M4Ms could be put into service with a rebuild, as could the E4Ms. If I ever get around to working on my E4M project again, I will do that...
1 of the M4Ms is usable (on the car) and 1 is nearly usable (just needs to have upper and lower gaskets installed, choke pull off, links and tuned
).The 4MV is pretty much junk. I've stripped it to nothing and learned how to plate on it. I know I've scavenged a few parts off of it, but it could probably be built back up. It's a 79 truck carb, though, so it's pretty much not worth any effort. Although, some of the parts are fairly pretty.
All of the M4Ms could be put into service with a rebuild, as could the E4Ms. If I ever get around to working on my E4M project again, I will do that...
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This pic will tell you where I am. It was taken last May at a show. Believe it or not I drove there in +8C weather in pouring rain with the top up. Then the prep for the show took a bit of time, as you can imagine. But yes, the Zaino finish helped with the clean-up.
The carb? Heck, I have three. The pretty one I posted is not quite right although being completely done over by a professional. I may work on that one in the spring.
The carb? Heck, I have three. The pretty one I posted is not quite right although being completely done over by a professional. I may work on that one in the spring.
Steve
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I have found a carb that has a Julian date 2034 which I believe is July 22/74. Would it be 'believable' to have a date like this on a car built Oct 24th? Thx!