Rochester 2GC info - Page 3

Dwight Southerland · 09-22-2015, 08:54 PM

Quote:

Originally Posted by Ed Wright

Both were stick cars.

Was there anything else back then??

Ed Wright · 09-23-2015, 10:12 AM

Quote:

Originally Posted by Dwight Southerland

Was there anything else back then??

Powerglides. Robert "Hutch" Hutchison was one of the first I remember making one fast in Div 4.
Personally, I broke a lot of 3 speeds in my '56 around that time. Took me a while to get my head out, and soften up the clutch.

MikeMoller · 09-28-2015, 10:49 PM

Anyone have an opinion on whether to use the power valve in these or block it off. I have a Deano carb and it is blocked off, haven't tried to 'restore' it to a power valve setup.

Mark Yacavone · 09-28-2015, 11:49 PM

Mike, How high are you foot braking it?

MikeMoller · 09-29-2015, 12:25 AM

Bad air 3000, good air 3500. By the way, just installed Kenny's converter today. With the old converter, 3500 was really wanting to push the brakes. Car was .04-.06 slower at 2500.

NORMAN BARNARD · 09-29-2015, 12:27 AM

Mike, you'll go nut's trying to use a pv in a roch. 2gc carb as they had so many deravations of the pvrc they used.. Plug it, retap the jetting holes and use the holley jetting, better selection and easily obtainable. Tip:, now your ready to begin playing with the fuel curve !!!!!!! (assuming you have a good wide band data logger).

Mark Yacavone · 09-29-2015, 12:30 AM

I don't think you need to worry about a power valve then.
As long as it drives around the pits okay...

MikeMoller · 09-29-2015, 12:37 AM

No issue in the pits. Thanks. Will know this weekend if the converter helps- it should be a little looser.

Ed Wright · 09-29-2015, 09:43 AM

Quote:

Originally Posted by NORMAN BARNARD

Mike, you'll go nut's trying to use a pv in a roch. 2gc carb as they had so many deravations of the pvrc they used.. Plug it, retap the jetting holes and use the holley jetting, better selection and easily obtainable. Tip:, now your ready to begin playing with the fuel curve !!!!!!! (assuming you have a good wide band data logger).

We used to do that to the old 4GCs. We were told then that we could not remove & plug it. Many of us pulled the piston/spring, pushed the piston up, and put a ding in the rod with a pair of dykes so it could not extend again, and jetted up. Easy to find Rochester jets back then.

MikeMoller · 09-29-2015, 12:12 PM

Found a good source of 2GC part including jets-Mike's Carburetor Parts. Has everything for 2GC's.

http://www.carburetor-parts.com/Rochester_c_31.html

09-28-2015, 10:49 PM	#23
MikeMoller Senior Member Join Date: May 2010 Location: Raleigh NC Posts: 635 Likes: 27 Liked 254 Times in 78 Posts	Re: Rochester 2GC info Anyone have an opinion on whether to use the power valve in these or block it off. I have a Deano carb and it is blocked off, haven't tried to 'restore' it to a power valve setup. __________________ Mike Moller NHRA 203 Q-R-T/SA

09-28-2015, 11:49 PM	#24
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,742 Likes: 2,844 Liked 5,002 Times in 1,902 Posts	Re: Rochester 2GC info Mike, How high are you foot braking it? __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

09-29-2015, 12:25 AM	#25
MikeMoller Senior Member Join Date: May 2010 Location: Raleigh NC Posts: 635 Likes: 27 Liked 254 Times in 78 Posts	Re: Rochester 2GC info Bad air 3000, good air 3500. By the way, just installed Kenny's converter today. With the old converter, 3500 was really wanting to push the brakes. Car was .04-.06 slower at 2500. __________________ Mike Moller NHRA 203 Q-R-T/SA Last edited by MikeMoller; 09-29-2015 at 12:29 AM.

09-29-2015, 12:27 AM	#26
NORMAN BARNARD Member Join Date: Mar 2006 Location: EL PASO, TEXAS Posts: 156 Likes: 0 Liked 2 Times in 2 Posts	Re: Rochester 2GC info Mike, you'll go nut's trying to use a pv in a roch. 2gc carb as they had so many deravations of the pvrc they used.. Plug it, retap the jetting holes and use the holley jetting, better selection and easily obtainable. Tip:, now your ready to begin playing with the fuel curve !!!!!!! (assuming you have a good wide band data logger).

09-29-2015, 12:30 AM	#27
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,742 Likes: 2,844 Liked 5,002 Times in 1,902 Posts	Re: Rochester 2GC info I don't think you need to worry about a power valve then. As long as it drives around the pits okay... __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

09-29-2015, 12:37 AM	#28
MikeMoller Senior Member Join Date: May 2010 Location: Raleigh NC Posts: 635 Likes: 27 Liked 254 Times in 78 Posts	Re: Rochester 2GC info No issue in the pits. Thanks. Will know this weekend if the converter helps- it should be a little looser. __________________ Mike Moller NHRA 203 Q-R-T/SA

09-29-2015, 12:12 PM	#30
MikeMoller Senior Member Join Date: May 2010 Location: Raleigh NC Posts: 635 Likes: 27 Liked 254 Times in 78 Posts	Re: Rochester 2GC info Found a good source of 2GC part including jets-Mike's Carburetor Parts. Has everything for 2GC's. http://www.carburetor-parts.com/Rochester_c_31.html __________________ Mike Moller NHRA 203 Q-R-T/SA