Did any auto manufactuer make a DOHC V8 in the old days?If so does anyone ahve any pics of one they can post.Didn't some one make ohc conversions for flathead motors?Or was it just ohv conversions,Thanks guys.
Y-block SOHC Alfa Romeo has been building DOHC engines since the 20's. including a DOHC straight 8 with twin superchargers in the 30's.
Thanks cool info there.Anymore?Would look cool to see a vintage DOHC V8 sittin between some duece rails.
Maserati built a 4-cam V8 (450S) race car in the '50s, and used a similar engine in several passenger cars. At least one of these found its way into a T roadster. The Porsche 928 (well, some of them) was a 4-cam V8. I remember a deuce Victoria with the top cut off that used one of these. Aston Martin made/makes one, but I think it's rare enough that none have turned up in junkyards. I can't remember any American DOHC V8s before the ZR-1 Corvette.
There were some factory prototypes arounf back in the 60s. Not sure gow many of them were dual cams tho. There was a centerspread photo in that HotRod magazine special amonth or so ago. Also weren't the Gurney-Westlake smallblock ford heads overhead cams?
______________________________________________________________________________- WillowBilly, i think your right, i think they were 1 of the 4 different Ford 4.6 DOHC engines made. I think the Gerney-Weslake was an all aluminum 4.6 Ford. Ford made a tank engine back in 1942 that was 1100 cid DOHC that made 500hp. Ford also made the 255 cid engine in 1964, i think, that was known as the A,J.Foyt Coyote engine. Chev, of course, has the LT5 5.7 (350) DOHC
I believe it was Riley that made an OHC conversion for the flathead V-8 in the 30s. There's some pictures in either Genat's or Batchelor's book. d
Thanks for the info guys.I think it would be cool to see a vintage dohc V8 sittin in a model A hot rod.
According to Dan Iandola's George Riley Racing Scrapbook (a must have read!) Riley made an OHV conversion for a 21 stud V8 and a single OHC engine of his own design. There was also a Riley OHC conversion for a flathead which was comissioned by Henry Ford himself in 1935, but there were only 4 of them made, they were installed in 34 roadsters and shipped to Argentina for an international stock car race. The engines have long since disappeared and may well still be in Argentina. Anyway, here's the Riley OHC engine. The spec was listed as follows: bore 3-1/16, stroke 3-3/4, 221 cu in, weight 350 lbs, 175 hp, priced at $695. There were only somewhere between 6 and 11 of these made as well, one of which found its way into this A roadster. Reprtedly ran 114mph at Muroc at a time when 120mph would have got you 1st place.
Pegaso Novi Moto Guzzi (30 cubic inch DOHC V-8) Maserati Ferrari Alfa Romeo Hispanp Suiza made SOHC V-8s and some "outlaw" or IMCA Champ cars used one bank of cylinders to build dirt track cars in "the old days" There were more, mostly toolroom specials in GP cars
Think Ford made one for the M4A3 Sherman tank during WWII. There was an old guy up around home that had one in his barn that he had bought surplus after the war. It was a huge piece of machinery.
Here's a couple of pictures of the the Davis engine conversions for flatheads. The RPU unit is the DOHC version, and the one on the floor is a OHV Hemi version. John O'Flarharty in LA has a DOHC version (one of 5 made), and it is going into an aluminum body '32 highboy roadster some day.
I don't know if I'd say we were behind....maybe just doing it differently. We still bring out new pushrod engines and they are still producing a ton of HP not to mention lightweight.
There was at least one Pontiac OHC V8 in the early-to-mid sixties. It's in a '63 Grand Prix now with a 3X2 intake.
That was a prototype. An engineer on that project, I believe, kept the last one and still has it. All the other Pontiac OHC V8 prototypes were destroyed. d
not a 32.....not a super old motor.....but is still a bitchin ride..... with a sound all its own...not the best pic....but it has a indy 4 cam ford motor.....brandon
All offy inlines were DOHC, as Offenhauser bought out Miller after working for him for years the big offy's are evolutions of the millers. evenr the millers were split case 4's with a long crank and 4 camshafts (2 over each set of 4 cylinders..) Offy just made that 1.5 liter 8 into a big big honking 4cylinder
There were many twin cam engines with much of the credit going to the Peugeot efforts of the teens. There were some early American Twin Cam engines with Miller and the Chevrolet brothers leading the way in the twenties, mainly fours and straight eights, and some V-16s which were really two eights side by side . Peugeot built an early V8 DOHC in the teens for an aero project but the best V-8 DOHC that comes to mind is the Novi. There were a number of V-12s and DOHC fours, sixes and straight eights but DOHC V-8s were somewhat rare until the Novi came on scene in the early forties. If I had to pick one engine to hear run on any given occasion the Novi would be at the top of my list-Jim
some guys dont recall that dual overhead cam refers to two cams PER HEAD.a V-motor with one cam per head is a SOHC,as are some of the previously mentioned engines.
Also Stone to answer your question as to OHC conversions for flatheads there were really quite a few for the early Fords starting with Roof in the teens (and Craig Hunt) and then The Chevrolet Brothers Manufacturing went into the conversion business around 1923. I believe. Speedy Bill has a number of beautiful OHC Ford based conversions including some DOHC. Beautiful little jewels that would look quite nice back between some rails-Jim
H. Fords 1944 dual overhead cam V8 engine patent (drawings) and description. http://www.google.com/patents?id=Ar...wing&zoom=4&dq=overhead+valve+ford#PPA1943,M1 Vergil
It would be interesting to find out more on Henry's version of the Twin Cam gear setup. Patents were quite plentiful and this patent apparently deals with using a worm gear between the twin cams. Spur gears and bevel gears were used singularly and in conjunction with chains, using the worm gear was a good idea. Will have to look in Borgeson's book on the Twin Cam to see how novel it really was. Imagine they would have built a working model, nice if it was still around.-JIm
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