Cossie crank, rods 'n pistons....

[CapriBoy]

How are they better than the standard pinto ones? And will i need to mod the block/ head in any way to fit them? Cheers

[Guest MK1gaz]

They're stonger (made of steel) so can handle higher revs/power levels . Standard cosworth pistons are for turbos though so low compression .

[Toby]

The was an artical in the original Fast Car magazine years ago where HT built an engine using Cossy Turbo pistons with the bowls skimmed off in a 1600 block (with short diesel rods). It's a good way of getting cheap forged pistons on a fresh 2.0 bore!! It goes against the theory of long rods being more efficient but this doesn't matter at almost all levels of tune, my Cortina engine has a theoretically hopeless rod to stroke ratio and I think it goes alright for a pre-crossflow (although it may wear quicker as the piston is being forced into the bore wall on the up stroke.)

 

You could use the cossy crank too, as Gaz says, because it's steel it will take more abuse.

 

You obviously can't use it all (pistons, rods and crank) in a 1600 block though as it's shorter (in height)

 

There is loads of theory about the piston speed (particually around TDC), rod angularity, but in my limited experience it is not worth worrying about (within reason).

 

Has anyone on here done this conversion? In the Fast Car article it sounded like a great "low" budget idea with good results.

 

They also reconned it was good for a sleeper 2.0 as the block suggests it's a 1600.