will the cossie pistons fit the zetec bottom end as i might do a bottom end rebuild

top of my head says no mate

if you're talking cossie pistons out of a cossie engine

If you are not increasing the bhp of the car, i think the pistons are ok, at a push maybe some ARP Conrod Bolts but the standard crank can handle 500bhp y0

If you are turboing, calibra turbo pistons are good, but require overboring and a 2.1 turbo result etc etc yada yada and is expensive

going technical on me now

also is a 4-2-1 manifold better than a 4-1

and on that one, i have no idea

Course it is! All the exhaust gasses won't be meeting in 1 point at the same time with a 4-2-1, it's kind of filtered into the single pipe rather than being forced into it. If ya get me!

As for the pistons, no idea, all that knowledge has been long since lost in my ageing mind!

_________________


Quote Clarkson, Top Gear, 17th July: "I'm not having a stroke... just driving a Nissan!"
Quote Ry, Mallory Park, 3rd Dec: "Ahhhh crap... Just a bit too over eager really!"
"I used to be an adventurer like you, but then I took an arrow in the knee"

well the YB is really a 20 year old design engine at least, so i doubt it mate

and not all the knowledge has gone yet Des

Naah, I can still remember where I park my car

_________________


Quote Clarkson, Top Gear, 17th July: "I'm not having a stroke... just driving a Nissan!"
Quote Ry, Mallory Park, 3rd Dec: "Ahhhh crap... Just a bit too over eager really!"
"I used to be an adventurer like you, but then I took an arrow in the knee"

fit remote start just in case, so if you forget you can hear it

*runs*

I've been meaning to get remote start fitted for a while now, but there's always something else to be spending money on

But I'd never thought about it being a homing device aswell, nice one

_________________


Quote Clarkson, Top Gear, 17th July: "I'm not having a stroke... just driving a Nissan!"
Quote Ry, Mallory Park, 3rd Dec: "Ahhhh crap... Just a bit too over eager really!"
"I used to be an adventurer like you, but then I took an arrow in the knee"

cheers for that des i will be seeking one or get one custom made hopefully it will improve the mid range power

in short the answer to your question is no. the YB runs the same size pistons as a Pinto. hardly suprising as its the same block essentially unless its the thicker walled 200. anyways. the pistons in that are 90 mm (or thereabouts). the pistons in a 2.0 zetec are 85 with 86.5 being an acceptable size for an overbore. you can get performance pistons for a zetec. altho it would at this point be worth mentioning that the gudgeon pins are a bit of an arse to get out as they are interference fit in the rod and float on the piston. depending on the age of your engine there are 2 sizes of pin. 19mm and 13/16ths. (21mm in new money) and i have no idea of the pin size on a YB piston. but the essence of it is no they wont fit.

the 4-1 is better for top end horsepower youll lose a bit of lower end...the 4-2-1 will sacrifice a small amount of top end for some more useable grunt lower down

besides. cosworths are forced induction. why would you want a lower compression ratio in an N/A engine?


jam

just wondered and forgot about the comression ratio