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Author Topic:   Jetting a 2GC carb.
jdukes74
Member
posted February 14, 2002 09:13 AM
O.K. Guys give me a hand. I have a 2gc I have been working on alittle and I would like to run it and see how it does. here's the deal I opened the bores up and smoothed them up ,, the jets in it are #51(stock I assume) and I need to know a good safe # to put in it to race what (what if i plug the powervalve off.) I run in west TN as far as elevation and all that stuff, It's over my head. Just a good starting point that won't burn my 350 up thats all i'm askin.


sdhnc29
Member
posted February 14, 2002 12:47 PM
The best thing that you can do would be to run your car on a chassis dyno , and take an air fuel reading . There is no telling what your changes have done , and any guess about jetting would be a shot in the dark . If you don't want to run the risk of a melt down , then do the chassis dyno deal so you are in a controlled environment and can see exactly what's going on .

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Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


jdukes74
Member
posted February 15, 2002 10:09 AM
THANKS FOR THE ADVICE BUT THINGS LIKE THAT AREN'T AROUNND LOCALLY. I WOULD HAVE TO GO TO A PRO SHOP IN MEMPHIS AND THAT WOULD BLOW MY BUDGET BUT i APPRECIATE IT.


KPLugnut
Member
posted February 16, 2002 10:25 AM
Jdukes, If you wish, I will set your carb up for you. You may be hard pressed to find stock Rochester jets in the appropriate size for your application, and hand drilling jets is not a recommended way of handling your calibration issue.
If your rules allow, I suggest converting the carb to accept standard Holley jets and then (as a ballpark starting point for your situation) try going with a 72-74 jet size.
I would NOT recommend blocking off the power valve in a 2G (or any other carb, for that matter).
Again, like the first reply says, it's nearly impossible to do this properly without either a dyno and/or some flowbench work or at least a test engine to dial in the carb.
Like I said, I'd be happy to set up your carb for you and for very little $, since in these times, that's an issue for every racer.

Hope that helps, and if you're interested, feel free to reply here, PM me, or email me at kineticperformance@thedirtforum.com

ttyl,
KPLugnut


o5racer
Member
posted February 16, 2002 06:26 PM
i ran a rochester 2 barrel last year for a couple of nights. it was on a 11 to 1 355, 202/160 cammel backs with a .504 cam. if you need jets just use Q-jet jets. they are available from GM for about 6 bucks a set and ***** in perfectly. by the way i ran a 69 jet.


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