1973 Chevy 350/145/224 Question

rboyle · 02-13-2016, 09:45 PM

Is anyone running this combo and if so who does a good Rochester 2 barrel carb? Just researching what other classes my car may fit into and the combo looks very similar to the 350/175/287 except for the carb and manifold being 2 barrel instead of 4. Has anyone had success with the 2 barrel version in N/SA? Thanks in advance.

Billy Nees · 02-14-2016, 08:32 AM

Not with a 73! It uses a smaller carb that 69-70.

Bruce Noland · 02-14-2016, 08:54 AM

It's a fun combination to race. But you will never get to the top of the sheet with it. Removing a quadrajet and replacing with a two barrel will cost a little over 80 horsepower. In very good air, you could expect to run about .60 under the index in a good car.

rboyle · 02-14-2016, 01:07 PM

Thanks Billy and Bruce for the input. The combo looks to be similar but I never knew what loss to expect with the carb/manifold swap. I should have it out soon and see what my baseline is.

02-13-2016, 09:45 PM	#1
rboyle Senior Member Join Date: Jan 2015 Posts: 582 Likes: 1,416 Liked 554 Times in 156 Posts	1973 Chevy 350/145/224 Question Is anyone running this combo and if so who does a good Rochester 2 barrel carb? Just researching what other classes my car may fit into and the combo looks very similar to the 350/175/287 except for the carb and manifold being 2 barrel instead of 4. Has anyone had success with the 2 barrel version in N/SA? Thanks in advance.

02-14-2016, 08:32 AM	#2
Billy Nees VIP Member Join Date: Oct 2002 Location: On a hilltop in Pa. Posts: 4,218 Likes: 3,090 Liked 6,772 Times in 1,519 Posts	Re: 1973 Chevy 350/145/224 Question Not with a 73! It uses a smaller carb that 69-70. __________________ Billy Nees 1188 STK, SS Make tech "TECH" again!

02-14-2016, 08:54 AM	#3
Bruce Noland VIP Member Join Date: Jun 2002 Posts: 1,855 Likes: 83 Liked 444 Times in 145 Posts	Re: 1973 Chevy 350/145/224 Question It's a fun combination to race. But you will never get to the top of the sheet with it. Removing a quadrajet and replacing with a two barrel will cost a little over 80 horsepower. In very good air, you could expect to run about .60 under the index in a good car. __________________ Bruce Noland 1788 STK

02-14-2016, 01:07 PM	#4
rboyle Senior Member Join Date: Jan 2015 Posts: 582 Likes: 1,416 Liked 554 Times in 156 Posts	Re: 1973 Chevy 350/145/224 Question Thanks Billy and Bruce for the input. The combo looks to be similar but I never knew what loss to expect with the carb/manifold swap. I should have it out soon and see what my baseline is.

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