what parts are best and why between 4x4 and 2wd cosworth inlet manifold exhaust manifold fuel rail etc. i have a 10mm spacer on the 2wd inlet is 4x4 better than that or is it better getting 4x4 then a spacer??

 

4x4 inlet have a better air flow if you use a 4x4 inlet you will need a 4x4 fuel rail as the fixings are in different places to the 2wd and you will need a 4x4 fuel reg as this is different as well 2wd has a bracket and a short piece of pipe the brackets are normally missing the 4x4 fuel reg bolts direct to the fuel rail your better using a 14mm spacer as its a straight fit then as you just bolt your fuel rail from the other side of the lugs with a 10mm spacer you will have to make or by some spacers for the fixing of your fuel rail and if you do space your inlet manifold your brace to the engine mount from the inlet will no longer fit without modification its not essential and you can run without it hope this helps

 

2wd exhaust manifold has a better top end flow rate


Luciano

 

rocker cover colour........

I wonder if there are many internal differences apart from mentioned inlet/fuel,exhaust manifold and ecu

 

4x4 inlet as says flows better, you can change the regulator/rail but I didn't, I just made a new mounting lug out of ally and bonded it on with structural adhesive and kept the old one!!
Plenum spacer wise unless your running bigger than a t34 I've been advised by several tuners its a waste of time!!

 

engine block is different as well as pistons, gudgeon pins, compression ratio and camshafts, probably other things as well

 

The whole engine is different, Ford claimed that 85% of components were either new or changed.

Oil cap is different, dipstick, head, too many things to list.

Martin

 

What about body structure and parts that dont form part of the engine.

Like can a 2wd shell be used for 4wd and vice versa?

 

4x4 shell has reinforced front wings, and also has notches cut out for the drive shafts, but all later shells had this anyway.

Martin