Quote Originally Posted by OldF
After a little late thinking 270 hp from the Peugeot 207 R3T sounds optimistic. A N4 has a 32 mm restrictor and about 280 hp and therefore 270 hp from a 1,6 l turbo engine with a 28 mm restrictor sounds quite optimistic. The power an engine produces is quite linear with the amount of air it get and using this as a base the area of a 28 mm restrictor is about 77% of the area of a 32 mm restrictor (28*28/32*32= 0,765625). 77% of 280 hp is 216 hp so a power range between 200-230 hp sounds IMO more realistic.
Hej din gamla Finn, now you add the number 28mm for a förbannade restriktor!
Is that going to be the rule?

If that's so then the fun is over.

The old Mazda 323 made about 240 hp max but in those days it was a 40mm rule and the 1600 seemed not to mind it as much as 2,0 motors.

But remember as always, what gets in thru the restrictor is one thing, what the motor does after (cams, compression ratio) is another and what the gearbox and axle ratios do to multiply torque is yet another.