Switch to 2bbl

jmoneyfoot · 12-14-2017, 01:05 PM

I currently have a dish piston 305 how much slower can I expect it to run with a 2 Barrel. Thanks for the input.

Mike Jones · 12-14-2017, 06:01 PM

My 69 Chevelle wagon ( 3865 lbs) slowed .5 or so from a Q-jet to a 2GC.
Mike A114

Mark Yacavone · 12-14-2017, 06:17 PM

Quote:

Originally Posted by Mike Jones

My 69 Chevelle wagon ( 3865 lbs) slowed .5 or so from a Q-jet to a 2GC.
Mike A114

Mike, Much bigger 2 bbl. on a bigger engine...Probably can't read too much into this.

Mr Money, Not enough info here. Depends on who built the 2 bbl, the 4 bbl, and the engine, itself.

Maybe the wizard on the hill in Pa. will take a WAG at it?

jmoneyfoot · 12-14-2017, 06:47 PM

Motor ran. 80 under with 4bbl. Having Dean Oliver build my 2gc. Not sure how good the intake is. It's going in a 77 Buick skylark that will fall into R/SA.

Mike Jones · 12-14-2017, 06:50 PM

Thanks Mark
Al Peters told me the difference between the small 2GC and the big one, is also about .5

Mike A114

MikeMoller · 12-14-2017, 08:27 PM

I run the same combo in 1978 nova: reasonable motor, deano carb, cam was ground for a four barrel. Ran mostly mid 13.8's in fair air, 13.7's in good air, mph mid 93 at 3450 weight in R - when HP was 180 in 2016 season. Running stock aluminum intake, not tried the cast intake as yet, for 1978 both are legal. Don't know how this will compare to your 4 bbl numbers.

Tom Moock · 12-15-2017, 02:25 AM

Jmoneyfoot, 305 dish piston motor, intake valves are different size, on 2 barrel & Q-jet. on 350 Q-jet & 2 barrel motor have same size valves, easer to switch 2 barrel to Q-jet.plus 2 barrel on 350 are bigger size than 305.

Larry Hill · 12-15-2017, 08:27 AM

Mr. Billy uses the SWAG method. With Billy it's science!

Billy Nees · 12-15-2017, 09:05 AM

Really good intake, really good head (don't worry about the small intake valves), bigger cam than 4V and carb flows about 325 CFM (before Deano).
There's a very good one here in Div.1 in a Malibu wagon that runs R and T and when it pops up it's usually a second under car. Much better combo than my 307.

Tom Moock · 12-15-2017, 12:33 PM

Billy, same cam 78 Malibu 2 barrel & 79 Malibu Q-jet, I thought about useing 2 barrel on my Malibu, but you had to change heads.

12-14-2017, 01:05 PM	#1
jmoneyfoot Junior Member Join Date: Dec 2015 Location: waconia mn Posts: 90 Likes: 21 Liked 9 Times in 5 Posts	Switch to 2bbl I currently have a dish piston 305 how much slower can I expect it to run with a 2 Barrel. Thanks for the input.

12-14-2017, 06:01 PM	#2
Mike Jones VIP Member Join Date: Apr 2012 Location: Connecticut Posts: 1,114 Likes: 1,172 Liked 660 Times in 283 Posts	Re: Switch to 2bbl My 69 Chevelle wagon ( 3865 lbs) slowed .5 or so from a Q-jet to a 2GC. Mike A114

12-14-2017, 06:47 PM	#4
jmoneyfoot Junior Member Join Date: Dec 2015 Location: waconia mn Posts: 90 Likes: 21 Liked 9 Times in 5 Posts	Re: Switch to 2bbl Motor ran. 80 under with 4bbl. Having Dean Oliver build my 2gc. Not sure how good the intake is. It's going in a 77 Buick skylark that will fall into R/SA.

12-14-2017, 06:50 PM	#5
Mike Jones VIP Member Join Date: Apr 2012 Location: Connecticut Posts: 1,114 Likes: 1,172 Liked 660 Times in 283 Posts	Re: Switch to 2bbl Thanks Mark Al Peters told me the difference between the small 2GC and the big one, is also about .5 Mike A114 Last edited by Mike Jones; 12-14-2017 at 07:37 PM.

12-14-2017, 08:27 PM	#6
MikeMoller Senior Member Join Date: May 2010 Location: Raleigh NC Posts: 628 Likes: 27 Liked 243 Times in 73 Posts	Re: Switch to 2bbl I run the same combo in 1978 nova: reasonable motor, deano carb, cam was ground for a four barrel. Ran mostly mid 13.8's in fair air, 13.7's in good air, mph mid 93 at 3450 weight in R - when HP was 180 in 2016 season. Running stock aluminum intake, not tried the cast intake as yet, for 1978 both are legal. Don't know how this will compare to your 4 bbl numbers. __________________ Mike Moller NHRA 203 Q-R-T/SA

12-15-2017, 02:25 AM	#7
Tom Moock Senior Member Join Date: May 2004 Posts: 801 Likes: 1 Liked 10 Times in 6 Posts	Re: Switch to 2bbl Jmoneyfoot, 305 dish piston motor, intake valves are different size, on 2 barrel & Q-jet. on 350 Q-jet & 2 barrel motor have same size valves, easer to switch 2 barrel to Q-jet.plus 2 barrel on 350 are bigger size than 305. __________________ Tom Moock 5704 STK

12-15-2017, 08:27 AM	#8
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,315 Likes: 1,671 Liked 9,553 Times in 1,983 Posts	Re: Switch to 2bbl Mr. Billy uses the SWAG method. With Billy it's science! __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

12-15-2017, 09:05 AM	#9
Billy Nees VIP Member Join Date: Oct 2002 Location: On a hilltop in Pa. Posts: 4,278 Likes: 3,181 Liked 6,957 Times in 1,569 Posts	Re: Switch to 2bbl Really good intake, really good head (don't worry about the small intake valves), bigger cam than 4V and carb flows about 325 CFM (before Deano). There's a very good one here in Div.1 in a Malibu wagon that runs R and T and when it pops up it's usually a second under car. Much better combo than my 307. __________________ Billy Nees 1188 STK, SS Reality, what a concept!

12-15-2017, 12:33 PM	#10
Tom Moock Senior Member Join Date: May 2004 Posts: 801 Likes: 1 Liked 10 Times in 6 Posts	Re: Switch to 2bbl Billy, same cam 78 Malibu 2 barrel & 79 Malibu Q-jet, I thought about useing 2 barrel on my Malibu, but you had to change heads. __________________ Tom Moock 5704 STK