2-barrel Roch Only Questions

SDT1DYI · 10-07-2021, 06:20 PM

69 and 70 SBC used the 1.375 x 1.686 Rochester. This I believe is the largest Rochester 2 GC .
Some Pontiac's used 1.312 x 1.686 Rochester's. I'm not a Pontiac guy so I can not tell you the motors or years these 2 GCs were used.
I would suggest limiting engine cubic inches to the 350's if using a 2 barrel.
2 barrels are adversely effected ( more so than four barrels) by Altitude and temperatures. Making them more difficult to predict an accurate run completion number, has been my experience.
They can be Fast as many have soft HP ratings by NHRA. But they are way different than running a 4 barrel combo in what they like or don't like.

Good Luck.
Steve Teeter STK/SS # 620
70 Camaro M/SA 350 2 barrel.

10-07-2021, 06:20 PM	#6
SDT1DYI Member Join Date: Nov 2016 Location: Indianola Washington Posts: 403 Likes: 0 Liked 455 Times in 147 Posts	Re: 2-barrel Roch Only Questions 69 and 70 SBC used the 1.375 x 1.686 Rochester. This I believe is the largest Rochester 2 GC . Some Pontiac's used 1.312 x 1.686 Rochester's. I'm not a Pontiac guy so I can not tell you the motors or years these 2 GCs were used. I would suggest limiting engine cubic inches to the 350's if using a 2 barrel. 2 barrels are adversely effected ( more so than four barrels) by Altitude and temperatures. Making them more difficult to predict an accurate run completion number, has been my experience. They can be Fast as many have soft HP ratings by NHRA. But they are way different than running a 4 barrel combo in what they like or don't like. Good Luck. Steve Teeter STK/SS # 620 70 Camaro M/SA 350 2 barrel.