Bonomelli's LOST twin cam engine

[andrea70]

3 valve, twin cam, twin spark, flat pistons, special parts, 1300 (180cv), 2000 (270cv)and 2700 (330 cv) cc.
i'm already shocked.

for now look at the pictures.






source:


more infos in the near future.... if the aliens don't kidnap me...

[Orbit]

Amazing pictures - this person was in search of power. I used Google search to find out more about Bonomelli, I believe the man is Ennio Bonomelli? Is there anywhere we could read more about Bonomelli ? It seems he was quite involved with Porsche Racing. Racingsportscars.com only has a little information about him but he was in some big races with some great cars , 1974 at Monza in a 3.0 RSR with Michael Keyser (USA) . Interesting that in the RSC description the engine is listed a Porsche/Bonomelli F6 2v SOHC. I am sure that Bonomelli has many stories to be told.

[72targa]

Wonder if it was used in this?...

http://www.invaluable.com/auction-lo...1-c-9bzx7g6q3r

[72targa]

This Porsche show car used a Bonomelli-tuned 2.4 liter engine

[Flieger]

Here is another 3 valve engine:

http://forums.pelicanparts.com/porsc...ve-engine.html

[Flieger]

[/QUOTE]

[Flieger]

[Flieger]

the 3-valve engine is based on a porsche 911 2.0 engine

cylinders 6
induction valves 12
exhaust valves 6
distributor marelli - twin plug
cams 4 (4 bearings)
bore 80 mm
stroke 66 mm
max rpm 9.000
slide valve set up carrera 10 (910)
intake stacks 917
mfi pump: Carrera 10 - bosch
spark plugs: 2 x10 mm/cyl
distributor: Carrera 10 - marelli
wiring loom: Marelli
cooling fan set up: Carrera 10
exhaust: 3in1+ 3in1 headers with carrera 10 megaphones
oil-pump: Carrera 10
flywheel: Custom steel
induction ports: 38 mm
induction valves: 2 x 33 mm
exhaust port: 42,5 mm
exhaust valves: 1 x 39,5 mm
valve springs: Double
c/r: 12,5 : 1
piston rings: Top 1,5mm l
second 1,5mm
oil control 3mm
con rods: Carrera 10 titanium
crankshaft: Carrera 10
engine case: Carrera10
cam housings: Cast alusil
valve covers 4 magnesium with integrated oiling channels


a second version of the engine was planned with gear-driven cams, a shorter stroke with a special crank and a 83mm bore.
They paid particular attention to the cam oiling and the oil cooling capacity of the engine was nearly doubled.

[Flieger]

[andrea70]

flieger
compliment to have found that pelican post.
i confirm to you that's the same engine.
i know the italian 70 years old man, Gottifredi. he was the chief designer of ennio bonomelli.


.... more info to come...