1.6 Duratec. What Is The Difference?

[retrosleeper]

I am after putting a 1.6 duratec in my car in rwd form but

im not really sure what the difference is between the engine codes can anybody
help?

I know the 1.6 duratec is just a rebadged slightly updated

1.6/1.7 Zetec SE or known as the sigma engine designed by Yamaha not to be
confused with either the Zetec E or the Duratec 2.0 or bigger.

What I don’t understand is in the latest variant of the 1.6

Duratec/Sigma engine is the 4 letter code attached to them and what the
differences are?

HXJA

HXJB

HXDA

HWDA

SHDA

I will be fitting one with the variable cams (TIVCT) I will

be using individual throttle bodies and an OMEX ECU so not fussed if the only
difference is the way ford tune them but if its better heads or different
valves ect I want to know this before buying one so I can get the best one for
power they all look the same from the pictures on adverts on eBay so cannot see
an external difference apart from the ones with TIVCT

Cheers guys for your responses

[WES180]

Hi Gareth. Why not go for something like a 2.0 Fiesta ST lump instead as you will end up wanting more power from the 1.6 and the ST engine starts off with 150bhp.

[retrosleeper]

Hi Gareth. Why not go for something like a 2.0 Fiesta ST lump instead as you will end up wanting more power from the 1.6 and the ST engine starts off with 150bhp.

the 2.0 duratec will not fit without moving my cross member which i will not do. even i dry sump it it will stick out of the bonnet where as the sigma engine will fit all be it very tight.

Got some friends running between 162bhp and 192bhp out of NA 1.6 sigma engine that rev reliably to 8k so thats good enough really. all else fails swap the pistons out for some custom dished ones and strap on a supercharger. Would love to use the larger duratec but it just wont fit.

the problem is nobody seems to be able to tell the difference in the latest engines. I may just have to stick with the original plan and use the older Zetec SE at this rate :(