Rochester Vara-jet 2-bbl (1982)

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Rochester Vara-jet 2-bbl (1982)

Postby 74_Vega_GT » Tue Apr 04, 2017 9:58 am

Hi all....So, I picked up a 2.8 v6 1982 model with a varajet on it. The carb body is split where someone overtightened the filter housing and leaks dangerously. This is in my new 82 s-10. The emissions controls label identifies it as the CHN series of emissions controls. Someone removed the smog pump, the original exhaust manifolds and replaced them with a set of headers, fouled up all of the vacuum hose routings, and probably couldnt get it to run and began throwing parts at it such as the fuel pump and the fuel bowl filter when they cracked the carb body and disabled their new fuel pump. The truck sat for over ten years when I got her. The has AC, 4 speed stick, non-computerized , great dash and body, but needs TLC....back to the carb...
. I am unable to find the exact model number of the carb. I read where the needle seats are different lengths depending on the exact type of emissions setup?? I noticed the absence of a vacuum reservoir ball under the hood. The vacuum canister itself seems to only have the gas tank vent line hooked up. We are going to a salvage yard to get a "frozen up" varajet to have a lower body that isn't split and leaking this morning for 20 bucks and go from there I suppose.
There are countless videos up on ewe-tube showing smog pump elimination, but none on this particular motor with this particular carburetor. Nor do they detail the subsequent hose routing and instructions on which hoses to plug or merge.
If any carb expert can shed some light on these proper procedures....FOR TEST PURPOSES ONLY...then I will eagerly await your responses...thanks in advance..Peace.
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Re: Rochester Vara-jet 2-bbl (1982)

Postby HI WINDING MONZA » Tue Apr 04, 2017 4:07 pm

I'll check for you,,..... :th:

Doug in P.R. 8)
Last edited by HI WINDING MONZA on Tue Apr 04, 2017 4:13 pm, edited 1 time in total.
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The 90's just keep rollin' along........
1990 Chevrolet Silverado Regular Cab Long Bed 350 TBI V8 700R4 105k miles
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Re: Rochester Vara-jet 2-bbl (1982)

Postby HI WINDING MONZA » Tue Apr 04, 2017 4:07 pm

I dealt with these carbs for many years, 4 cylinders use a 1" filter, V6's use a 2" filter. If I remember right the V6 has a bigger primary also.



More info here in the manual... Choose Varajet from the list of carb manuals. Page 4 has the Id info.
http://www.carburetor-blog.come

Doug in P.R. 8)
My Old Cadillac Powered Monza Still Lives...........now on its 5th owner!..........Somewhere ?

The 90's just keep rollin' along........
1990 Chevrolet Silverado Regular Cab Long Bed 350 TBI V8 700R4 105k miles
1992 Pontiac Sunbird Coupe 2.0 OHC MPFI I4 TH125C 143k miles
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Re: Rochester Vara-jet 2-bbl (1982)

Postby spencerforhire » Wed Apr 05, 2017 6:08 am

At the salvage yard, check any "donor" S-10's you find; they should have a vacuum hose routing diagram on the rad support. But you should be able to eliminate pretty well everything except the vac. line to the distributor and a source for the A/C controls.
The "fleet"-
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
72 Vega HB Drag Car -383/'Glide/9"(9.35@146.19)(5.94@117.28 1/8th)
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
03 Silverado 2WD ex.cab (work truck/parts hauler)
04 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
93 Suburban- 350/4L60(retired)
00 Saturn SW2- wife's car
01 Saturn SC2- younger son's project
00 Saturn SL2- daughter's car
98 Saturn SW2- spare
and 3 more Saturn "parts cars"
Note- the very act of listing all of these has made me realize I have some kind of problem.....

Visit http://www.spencerforhire.ca
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Re: Rochester Vara-jet 2-bbl (1982)

Postby 74_Vega_GT » Thu Apr 13, 2017 9:33 am

Thanks for the input, yes, we eliminated all but 2 vacuum lines, the vacuum advance and the dash controls source. The carb build worked and she starts and idles well. The air cleaner filter housing is kinda trashed, so its not on yet. Peace
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Re: Rochester Vara-jet 2-bbl (1982)

Postby 74_Vega_GT » Tue May 02, 2017 12:25 pm

She runs nice with 130K miles on her. One lifter tapping on this 2.8 with headers setup that will have to be addressed. See other post in "Off Topic section" and thanks for the input. Peace.
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