Q-JET Numbers - Forums - Official C3 Vette Registry

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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Joined: 10/31/2007
Posts: 2389

The Q-jet on my 72' I believe has been changed. The reason why the TCS system is not correct. The number on the one I have is 17054920. Does any one have a list to determin what this fits and if it can be matched to the engine if re-built to spec? The one that is for that car/engine according to the Black Book is, 7042203 or 7042903. The one on the car I believe is for a vehicle after 1976. I would like to have the correct one, seeing all the other numbers are correct, to the best of my knowledge. THANKS Mark

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Q-JET Numbers (2/13)
3/1/10 3:58pm

dcherr
Former Member
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Elkhart, IN - USA

Vette(s):
1975 Red T-Top 1972 Red Convertible

Joined: 10/7/2007
Posts: 209

Yes any number that starts with 170 is a 75 and newer. I just finished rebuilding a 7042208 carb that is off a 72 truck. rejeted it for a 7042203 manual trans. (KNOW ONE WILL EVER KNOW). If you go to swapmeets look for these code numbers. 7042 is a 72 year and 203 is manual trans and 202 is automatic.

I will e-mail you the codes to brake down the carbs.

Dean

Q-JET Numbers (3/13)
3/1/10 4:33pm

KDADDY79
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Dutchess County, NY - USA

Vette(s):
White '79 Corvette. It's a driver.

Joined: 8/27/2007
Posts: 2484

Mark,

I have heard good things about www.carbjunkys.com

Thay may have a core or a correct rebuilt Q-Jet for you.

Keep us posted.

Kevin

Q-JET Numbers (4/13)
3/1/10 5:19pm

THANKS Guys, I E-mailed the junkie. Nothing on his E-Bay site. I may have it re-jetted when re-built. Longs it runs right and gets decent gas mileage I do not care. Would be nice to have the correct number on the bowl though. Mark

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Q-JET Numbers (5/13)
3/1/10 7:30pm

dskopp
Limited Member
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Oak Creek, WI - USA

Vette(s):
1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!

Joined: 5/21/2008
Posts: 1958

1972 Corvette Carburetors

HP	Application	Mfg.	Model	Mfg. #	Chev. #
200	4-Speed	Rochester	MV4		7042203
200	4-Speed/NB2	Rochester	MV4		7042903
200	THM	Rochester	MV4		7042202
200	THM/NB2	Rochester	MV4		7042902
255	All	Holley	4150	R6239A	3999263
270	4-Speed	Rochester	MV4		7042217
270	THM	Rochester	MV4		7042216

Does this help any????? Dan Big smile

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Q-JET Numbers (6/13)
3/2/10 9:25am

THANKS DAN, MUCH appreciated. What does the "NB2" stand for? If you find a 203 laying around without a home let me know. Preciate your input/assistance.

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Q-JET Numbers (7/13)
3/2/10 4:00pm

Mark: The info I sent you came from this web site http://www.corvette-world.com

Ther is a lot of information on that site for any corvette!! Check it out. I am not sure what "NB2" means. I will find out and let you know. I'm sure it refers to a transmission type.

Dan

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Q-JET Numbers (8/13)
3/2/10 8:29pm

2 cruzn

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Poquoson, VA - USA

Vette(s):
73 Conv, Blue-Green/White Top - 454, M21 - Dark Saddle Leather, Power Windows, A/C, Tilt/Tele, AM/FM St. (orig. and sounds like it too).#2 -- 2007 Coupe,3 LT package, Z51 option, Victory Red, Ebony Int. Clear Top.

Joined: 11/20/2004
Posts: 1023

Found this on a site...

CDH . 350..200 ... Roch. Q-jet, NB2 & 4-Speed
CKX . 350 .200 ... Roch. Q-jet & THM
CDJ .. 350 .200 . . Roch. Q-jet, NB2 & THM

NB2 equipment was required on California 1972
Corvettes and consisted of an Air Injection Reactor
system and different camshaft with longer valve overlap

2 cruzn2010-03-02 17:32:36

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USN 1966-1970
WestPac 67-68 Tet I&II

Featured in Corvette Enthusiast Aug 2007 "Shark Attack"
Blue Green *** 454,4 Spd, Dark Saddle Leather, A/C, AM-FM St. (orig), PW, Tilt -Tele Wheel"

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Q-JET Numbers (9/13)
3/2/10 9:08pm

Thanks Ray, I knew that the NB2 was something simple.!!

Dan

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Q-JET Numbers (10/13)
4/14/10 7:24am

FirstCorvette!
Former Member
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Easley, SC - USA

Vette(s):
Yellow 1980, L48,Auto, Matching Numbers, Everything factory original...for now.

Joined: 4/14/2008
Posts: 39

Hey guys,

I'm having trouble with my qjet after having the engine reubuilt with a mild cam and better heads. I took the car to my mechanic to have the carb rebuilt and he said the numbers on the carb indicated it was for a 305 and I have a 350.

I've tried to find info on an 80 vet on the sites shown above but can't seem to find any carb info. If someone has some info I would appreciate it.

Q-JET Numbers (11/13)
4/14/10 8:13am

The BLACK BOOK on vettes should have the carb numbers listed in the section for your year. If you do not have one, go to the AMAZON.COM site and get one that may not be currant for new years, but will cover the older years. I will look in mine and send you numbers by PM if you want. What other info do you need? Mark

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Q-JET Numbers (12/13)
4/14/10 1:18pm

FirstCorvette!
Former Member
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Easley, SC - USA

Vette(s):
Yellow 1980, L48,Auto, Matching Numbers, Everything factory original...for now.

Joined: 4/14/2008
Posts: 39

If you could tell me what the number on my carb means that would be a big help. 17080204

Q-JET Numbers (13/13)
4/15/10 3:45pm

Mr. First, According to the BLACK BOOK you HAVE the CORRECT carburator. The "1" is for 1976 and later. The second "0" is for the year. The "204" is for auto trans and 190 hp. DO NOT get rid of the carb. If you get a reputable technition to rebuild it, it should work. Even if you do not use it and replace it, keep it around. Mark

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