4.1 factory specs? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

Tza · 01-16-2006, 02:37

can anyone tell me the factory power and torque output of the old 4.1L alloy head XF inline6?

and also how much potential they have? ie. power limit?

thanks

xrglen · 01-16-2006, 17:19

Quote:

Originally Posted by Tza

can anyone tell me the factory power and torque output of the old 4.1L alloy head XF inline6?

and also how much potential they have? ie. power limit?

thanks

here we go again.
leaded 250 carb 105kw and 310 nm
leaded efi 250 111kw and 325 nm
unleaded carb 250 103kw and 315nm
unleaded efi 250 125kw and 333 nm

you can get very good power gains from the c-2 efi head and good cam and carb. i got 360hp from a solid motor on avgas.

Tza · 01-17-2006, 03:40

cheers,

the efi heads have bigger valves and better ports yeah?

how would I go about fitting a carb manifold (LPG) to a efi head?

xrglen · 01-21-2006, 00:11

Quote:

Originally Posted by Tza

cheers,

the efi heads have bigger valves and better ports yeah?

how would I go about fitting a carb manifold (LPG) to a efi head?

just a bigger inlet valve by 1mm. ports are the same.