91vert Posted November 15, 2019 Share Posted November 15, 2019 Found this on the web. Has anyone else heard of this one ? Experimental 425 nailhead, fed by 3 carter YH carbs and a single turbo, it made 620 ft/lbs. Because nothing for driveline could hang with it, the project was sidelined and were left wondering what could have been. Again quoted from the web so has anyone else heard of this monster ? Cal. Link to comment Share on other sites More sharing options...
91vert Posted November 15, 2019 Author Share Posted November 15, 2019 Another pic of a nailhead by the same poster. 1 Link to comment Share on other sites More sharing options...
billbuickgs Posted November 15, 2019 Share Posted November 15, 2019 Yep! There is an article titled" Buicks back room " in a 70's Motor Trend Mag It shows all of Buick toys and the above turbo made over 800 HP !!! Not to shabby for a Nailhead Bill 1 Link to comment Share on other sites More sharing options...
BUICK RACER Posted November 15, 2019 Share Posted November 15, 2019 I've seen that engine in real life several times. The dynaflow transmission wouldn't hold up so the idea was done, it's been on display at the powertrain headquarters, and several Buick club shows over the years. 3 1 Link to comment Share on other sites More sharing options...
JohnD1956 Posted November 16, 2019 Share Posted November 16, 2019 Looks like the turbo pushes through a 2 bbl intake manifold? Link to comment Share on other sites More sharing options...
PONTIAC1953 Posted November 16, 2019 Share Posted November 16, 2019 1 hour ago, JohnD1956 said: Looks like the turbo pushes through a 2 bbl intake manifold? more likely to increase or keep up air velocity or air speed. not depending on throttle size to move air as a normal aspirated engine does Link to comment Share on other sites More sharing options...
60FlatTop Posted November 16, 2019 Share Posted November 16, 2019 It's the kind of thing myths are made of. 1 Link to comment Share on other sites More sharing options...
NTX5467 Posted November 20, 2019 Share Posted November 20, 2019 When we toured the V-6 plant in Flint, for the 75th Anniv. of Buick meet in '87, the 401 Turbo engine was on display. Some of the first, early '62 Wildcat print ads mentioned it as an option, but never to be due to the transmission isuues Roberta mentioned. One 2bbl Rochester was feeding it. LOTS of torque. Remember, this was in the pre-THM400 days, too. 4-speed HydroMatics were the only possibility, BUT probably would not fit the trans tunnel dimensions of the '62 Buicks. Plus, the issue that it wasn't a Buick transmission. NTX5467 Link to comment Share on other sites More sharing options...
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