Quote:
Originally Posted by Frank Lee
Low CR = low efficiency.
Low rpm isn't magic- most low rpm engines are really long stroke so the piston speed ends up comparable to high rpm, short stroke engines.
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Yep. and never said it was magic.
The problem however with doing a stroker engine is that then you have additional torque which the transmission can barely handle, so you then get spinning tyres at low speed which lose traction, and you guessed it, continue to spin.
Its not a very high RPM that the wheels are spinning at, its just slipping like crazy because of the additional torque. Which can probably be fixed by increasing the diameter of the wheels, to very large ones.
Thats what I've heard happens anyway.
Increasing the mass of the flywheel can then be used to counteract the lack of a power stroke during the times that cylinders 3 and 4 would be firing.
A definitely tempting modification to do, but on a carburetted engine its a lot easier to do.