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Author Topic:   Roschester '2 Jet'
Blind Barney
Dirt Maniac

Total posts: 120
posted January 29, 2005 04:14 PM  
Went searching today for a 2 barrel Rochester and found one that just says '2 Jet'. Is it a good one? What about the dial on the side that says lean and rich, do rip that off or do I need that? What do I remove and what do I leave on?

racer17j
Dirt Forum Champ
Total posts: 5390
posted January 29, 2005 06:14 PM  
What would that cost? What does yours say on it?

BCracing
Dirt Full Roller

Total posts: 32
posted January 30, 2005 09:35 AM  
NO the 2 jet dont mean anything--thats on all of the rochester 2 bbls--look for the # on the side the big ones are numbered from 7040114-7040120 there are also some other ones also--what did it come off of?? most of the big ones came off of 400-455 pontiacs and oldsmobiles--also some of the best ones come off grain trucks, school buses and fire trucks

BIGDADDYBOZ
Dirt Freak

Total posts: 466
posted January 30, 2005 10:09 AM  
The easiest way to tell if it's a big one or not is see if a 1/2 inch wrench will fit over the casting in between the venturies. If it does thats the big one! A 9/16 will fit over the middle sized carb and not sure on the little ones.

Blind Barney
Dirt Maniac

Total posts: 120
posted January 30, 2005 12:13 PM  
It came off of a 78 Caprice Classic. The numbers on the side say 17058101 & 0938BTM1. What does EGF on the back mean? Not sure I want to run the wizzy carb because they are talking of a $50 carb claim + exchange rule for this year to try to keep guys from spending the money

BCracing
Dirt Full Roller

Total posts: 32
posted January 30, 2005 03:45 PM  
both of them are smaller ones--as far a what you gotta take off--yes u take off that thing that says lean-rich thats part of the choke, you also have to take off the choke plate of the top the carb--I would just spend some money on a good carb--you can buy a new one outta Speedway for $250 its well worth having a good carb

HameltonRacing
Dirt Full Roller

Total posts: 60
posted February 08, 2005 11:14 AM  
i have one and the numbers on the side are 7042114. is this a bigger one or not?

KPLugnut
Dirt Forum Champ
Total posts: 1019
posted February 08, 2005 12:29 PM  
Nope, that's the 1 5/16" venturi carb that is probably the most common one to find on cars/trucks for many years. That one is a 1972 model off a chevy with automatic transmission.

And BCRacing's reference to the Speedway catalog carbs is not quite right. They are NOT true "big bore" 1 3/8" venturi carbs, they are common cores that have been punched out to (barely) 1 3/8" and half-heartedly reshaped and then just rebuilt as stock rebuilds with no real internal modifications.

KP

[This message has been edited by KPLugnut (edited February 08, 2005).]

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