DennaGT175
New Member
Hi guys, please can some light be shed on the two above mentioned engines...my reason for wanting to know is because i have the Megane 2 ph2 GT with the F4R776 engine which i believe has 170bhp. I want to know if the Megane 2 225 with the F4R774 engines are internally the same or are there any similarities...
I am busy building my GT now and have removed the cylinder head and found that there is a noticeable difference in head gasket thickness - roughly the 774 head gasket is double the thickness than the 776 indicating that the compression ratio is lower on the 774 to compensate for the higher boost. So in terms of the rods and pistons, are there any actual differences with those parts between the two engines and are there any other hardware differences, cams, etc,?
I know the turbos are different, the 776 having a 10T tutbo and the 774 having a 14T turbo, as well as the injectors are different having the colour "blue" on the 774 engine and "brown-ish" on the 776 engine.
So, having said all that, can the 776, with the head gasket, turbo and injectors from a 774 engine work well in producing 225bhp? if not more, with a decent map?
I am busy building my GT now and have removed the cylinder head and found that there is a noticeable difference in head gasket thickness - roughly the 774 head gasket is double the thickness than the 776 indicating that the compression ratio is lower on the 774 to compensate for the higher boost. So in terms of the rods and pistons, are there any actual differences with those parts between the two engines and are there any other hardware differences, cams, etc,?
I know the turbos are different, the 776 having a 10T tutbo and the 774 having a 14T turbo, as well as the injectors are different having the colour "blue" on the 774 engine and "brown-ish" on the 776 engine.
So, having said all that, can the 776, with the head gasket, turbo and injectors from a 774 engine work well in producing 225bhp? if not more, with a decent map?