Giorgio, the Fiat has a flat head, which is a disadvantage on the one hand, and an advantage on the other. The main disadvantage is the large area of the combustion chamber and thus greater heat losses and thus less energy is used for work, but if we use wood gas as fuel, these losses are smaller due to the colder combustion method. The advantage is that the valves are in the engine block and the head itself is just a cooled cover, if the head is sanded down a bit (2-3 mm) the compression space suddenly decreases because the surface is large, so I assume that the CR of this engine could be raised to 1:8, maybe even higher. It is necessary to measure how high the valves rise and the depth of the combustion chamber, and this will be the limit.
thanks tone for the explanation…do you think a new motorhead gasket is to find yet?
for my hanomag 30 years ago i found -with difficult- plates from a material named “klingerit” …from this i made the new gasket, what keeps up til now…the gaskets what are to found in this time for the hanomag were thinner than the original, i tried them, also with 2 gaskets, one over the other, but they kept only for 500 km, than cooling water comes again in the combustion chamber …very dangerous for the motor…i at least found the problem by myself, the mechanican what i consulted in this time not knows what to do…
i observed that the gasket always on the same place burned, and there water comes in the combustion chamber…the motorhead was new plained…but there is a detail on the cylinders…the cylinders has a little border to protect the gasket…this border is interrupted by some millimeters where the pre-chambers enters in the combustion room, and on this place always , after 500 km , enters water in because of slightly consumption of the metall because of the strong pressure of the diesel …instead of plaining the whole motorblock, what would be a big work, half tractor to make in pieces…and so on…
so i tried on the slightly consumed parts , only there , to make layers from very thin copper- this kind what at school is used for designing on it- than the self made gasket on, and this kept up till now…this was really fine, it saved me a lot of cost and work…
but the ting i would ask you, .is . it possible instead a normal gasket , to use the red liqud gasket also here?
or not keeps up the pressure and heat?
ps. my son found the same original spark plugs in internet, shure more than 50 years old, in original confection, relatively cheap, cheaper than new ones…
Modern engines use metal seals made of several thin layers of metal plates, and silicone or rubber is added in the areas where the oil and water channels are. A few times I made seals from aluminum foil (similar to the one used for packaging medicine) and also used several layers (approx. 5).
I use it to seal areas with oil or water
In my mind, being able to make your own head gaskets suitable for higher compression puts you guys in a whole other league than the one I’m playing in. Very impressive.
the magneto of the fiat…has someone a idea, the screw on the right side is for a wire for shut-off electricity by short circuit to the mass?
You could make a wire with a switch to Ground, connected to engine or chassis, either a momentary “On” switch or a toggle switch.
Or make one with a bit of spring steel and another contact like they do for older small engines.
I would want the Kill Switch near your steering controls.
tone, thanks for pictures…motor oil 15 /40 is ok for this engine? have you informations about?
ciao giorgio
Giorgio, 15/40 oil is definitely good for this engine, although I buy 10/40 oil, which I use in all my engines, the price is almost the same, but it has slightly better cold start viscosity.
(upload://fnsvvpMFqOh1Sta8RRxu9Fkz2ti.jpeg)
and the shocking end of a lot of gasifiers on the scrapyard …lazyness mostly wins when petrol is cheap…
seems roger fagerholm not knows the secret of the lemons yet…
Thanks for pictures!!!
my son makes the tractor picture collection…he looks in different languages, always something interesting is to find!
http://www.vedbil.se/dagbok/mera/19e.shtml