Offenhauser Dual-Port 360* Intake ~ 'Was It A Gimmick'

grumpuscreature said

Tried one of these on a '72 318 Swinger in '73 with a 600CFM Holley with vacuum secondaries. At a full throttle stomp from idle, it had a massive bog when the secondaries opened that I couldn't tune completely out. If you rolled into the throttle and let things progress at a more sedate pace, no problems, but that wasn't as much fun. Replaced it with a single plane Torker that wound up on 3 more cars...

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I never had that problem with bogging. I was also running 600 Vac secondary Holleys. My Roadrunner ran 4.10s and the dually had 4.56s. The amazing thing was that I was running Crower cams with an advertised 300' duration also. I don't have the specs on them anymore but I know that they weren't supposed to develop much torque below 2000 rpm. I know my Roadrunner never launched very hard, but it didn't bog.

I was never able to break out of the 13's with the Roadrunner. The cams weren't the best choice. But like I said, I was young and dumb. Bigger was supposed to be better and 300' was pretty lopey at idle. Although I know that the Torkers were a much better performance choice (and might have helped at the track), I ran pretty good on the street with those Offy 360s.