Flat 8 - is it possible
Discussion
I think that in the 60s or 70s, rootes group had a flat 8 diesel.
he had one as a bench test engine at college, but there was also something else weird about it.
It had a rocker arm arrangement from one central crank so that the pistons moved towards each other and created a combustion chamber in the middle and was a 2 stroke.
The problem with a flat 8 porsche 911 is that you are making the engine longer and therefore increasing the rear overhang.
Thats the last thing you should be doing with a car which is already a triumph of engineering over physics.
best to just make it mid mounted like the Caymen, boxter and the other big V10 thingy
Think you missed that I suggested mid-mounting it like the Porsche boxter..
Yes - I know Fiat .. sorry Ferrari have flat 12's but that is 12 not 8..
I presume that it matters not how many cylinders you have because the crank would be horizontally opposed - so the cranked is a 180 degees flat plane affair anyway.
Yes - I know Fiat .. sorry Ferrari have flat 12's but that is 12 not 8..
I presume that it matters not how many cylinders you have because the crank would be horizontally opposed - so the cranked is a 180 degees flat plane affair anyway.
The crank is going to be very wiggly if the cylinders "box". There will be eight throws, remember that a V12 has only six throws.
If the cylinders do not "box" then the engine will be no smoother than a four cylinder turned onto its side.
The remaining possibility of non "boxing" cyinders and a cross plane crank would be very hard to balance properly, in fact some compromise involving firing order and balancing shafts may be required.
Difficult.
odyssey2200 said:
I think that in the 60s or 70s, rootes group had a flat 8 diesel.
he had one as a bench test engine at college, but there was also something else weird about it.
It had a rocker arm arrangement from one central crank so that the pistons moved towards each other and created a combustion chamber in the middle and was a 2 stroke.
he had one as a bench test engine at college, but there was also something else weird about it.
It had a rocker arm arrangement from one central crank so that the pistons moved towards each other and created a combustion chamber in the middle and was a 2 stroke.
You're thinking of the Commer TS3 engine, which had three cylinders and six pistons.
Pigeon said:
odyssey2200 said:
I think that in the 60s or 70s, rootes group had a flat 8 diesel.
he had one as a bench test engine at college, but there was also something else weird about it.
It had a rocker arm arrangement from one central crank so that the pistons moved towards each other and created a combustion chamber in the middle and was a 2 stroke.
he had one as a bench test engine at college, but there was also something else weird about it.
It had a rocker arm arrangement from one central crank so that the pistons moved towards each other and created a combustion chamber in the middle and was a 2 stroke.
You're thinking of the Commer TS3 engine, which had three cylinders and six pistons.
hhmmm age clouding the memory again!
The Can am'er 16 was no where near 2000 bhp. was around 8litres and NA, would have made more power than the then 8.8 Big Mac lumps but no where near the flat 12's blown power of around 1100bhp in the races (5.4 litres) and 1500 odd in the Special Run that Mark Donohue at Talladega in 75 at an "Average!" of 221mph.
16 was too big and heavy and no where near the power of the Turbo 12. It weighed 850kg!!
16 was too big and heavy and no where near the power of the Turbo 12. It weighed 850kg!!
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