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#1
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Man-A-Fre
I just read a 1968 article about Man-A-Fre "Carb injection" manifolds (each venturi fed just one cylinder). I know they sold a bunch of them for SBC, but I see they also offered one for the OHC six. Anybody know if they worked well on the cammer?
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Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) |
#2
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Jack, I ran one in the late 80’s and did not have good luck with it. The same engine in the same car slowed down 2 tenths and 3 mph in the 1/4 mile. As an added bonus my Street mpg dropped by a third! This was in a 67 Lemans, mostly stock 230 with a turbo 350 automatic and 3.55 gears.
Thinking it over I believe the balance passages between the runners was to small, and I was running mercury marine’s version of the 2 GC carbs. They are pretty as they are aluminum bodied. The set up looked good, but hood clearance was an issue on the front aircleaner. I had to sacrifice a solid flat hood and ran a wide hood scoop to cover the offset and very forward hole needed in the hood. I also think I needed to deactivate the enrichment valves in the carbs, didn’t think about it until after I sold the complete set up around 25 years ago. It was an attempt to get that Lemans with a full interior into the high 13’s. It failed, but I think with some work it would make a good manifold. But I wasn’t willing to do it. I have some ads that came with the manifold when I found it in a now long closed Detroit speed shop.
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Jeff R 60 Jaguar Mark 2, 3.8L Automatic 67 Sprint Firebird 230 OHC-6 4-Speed A/C 78 Catlina Safari, Pontiac 400 powered 77 Astre Formula, 215 Buick V-8 T-5 73 Lemans Safari, 400 4bbl 4-speed 71 Catalina Enforcer, 455 4bbl 06 Mallet Solstice #024 LS2, Now with a Tremec 6060 6-speed! 2012 F-150 Echo Boost (My local Ford Dealer SUX!!!) 2020 Dodge Charger Scat pack (recovered) |
#3
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Jack, This is the one I always wanted to try, but never did find an example of it
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Jeff R 60 Jaguar Mark 2, 3.8L Automatic 67 Sprint Firebird 230 OHC-6 4-Speed A/C 78 Catlina Safari, Pontiac 400 powered 77 Astre Formula, 215 Buick V-8 T-5 73 Lemans Safari, 400 4bbl 4-speed 71 Catalina Enforcer, 455 4bbl 06 Mallet Solstice #024 LS2, Now with a Tremec 6060 6-speed! 2012 F-150 Echo Boost (My local Ford Dealer SUX!!!) 2020 Dodge Charger Scat pack (recovered) |
#4
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Or this Moon Tri - Power that I have also never seen in person , downdraft with Webber 45's
I think this is what was uses on the 1st Finch FB
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Jeff R 60 Jaguar Mark 2, 3.8L Automatic 67 Sprint Firebird 230 OHC-6 4-Speed A/C 78 Catlina Safari, Pontiac 400 powered 77 Astre Formula, 215 Buick V-8 T-5 73 Lemans Safari, 400 4bbl 4-speed 71 Catalina Enforcer, 455 4bbl 06 Mallet Solstice #024 LS2, Now with a Tremec 6060 6-speed! 2012 F-150 Echo Boost (My local Ford Dealer SUX!!!) 2020 Dodge Charger Scat pack (recovered) |
#5
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I finally found the Ads on my HD of the Man-A Free intake ads. Looks Like they also had a downdraft Webber option
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Jeff R 60 Jaguar Mark 2, 3.8L Automatic 67 Sprint Firebird 230 OHC-6 4-Speed A/C 78 Catlina Safari, Pontiac 400 powered 77 Astre Formula, 215 Buick V-8 T-5 73 Lemans Safari, 400 4bbl 4-speed 71 Catalina Enforcer, 455 4bbl 06 Mallet Solstice #024 LS2, Now with a Tremec 6060 6-speed! 2012 F-150 Echo Boost (My local Ford Dealer SUX!!!) 2020 Dodge Charger Scat pack (recovered) |
#6
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Interesting stuff. Thanks.
The article I read was an interview with Man-A-Fre's owner. I was surprised at the amount of modification made to 2GC carbs- including major downsizing of main jets, down about 8 numbers from normal. Any chance your 2GCs weren't properly modified? The dyno results in the article showed a good power increase over the Sprint 4-bbl setup.
__________________
Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) |
#7
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I can assure you my Carbs were NOT modified properly. Like I said I did not deactivate the Power Valves, I did downsize the main jets, but I felt a noticeable power loss around 4000 rpm for 200-300 rpm. Then it would pick back up.
Like I said I had had these Aluminum Bodied 2GC's laying around for some time. I had bought them thinking of making a custom tri power for my GTO at the time forgetting that they all had chokes. So they were just sitting there. I did not fully think thru the modifications they may have needed other than leaning them out for feeding just 1 cylinder.
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Jeff R 60 Jaguar Mark 2, 3.8L Automatic 67 Sprint Firebird 230 OHC-6 4-Speed A/C 78 Catlina Safari, Pontiac 400 powered 77 Astre Formula, 215 Buick V-8 T-5 73 Lemans Safari, 400 4bbl 4-speed 71 Catalina Enforcer, 455 4bbl 06 Mallet Solstice #024 LS2, Now with a Tremec 6060 6-speed! 2012 F-150 Echo Boost (My local Ford Dealer SUX!!!) 2020 Dodge Charger Scat pack (recovered) |
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