Hello everyone,

Ive got a question which i cant seem to find the anwser to.
Year ago i bought a k20 swapped EG, car came in with an ITR cluster from a DC type R.

Wiring seems good, everyhting works as it should (besides the temperature hanging just 5 degrees lower than it should be (90 Degrees celcius)).
However, my bigger problem is the speedo having a difference of 30 km/u. Difference seems lower on lower speeds than higher.

When driving 100 km/u, my cluster shows me 130km/u
Everything above +/- 100 km/u, has a 30km/u difference, bellow 100 km/u, difference is slightly smaller.
I drive on a doctronic ecu, was going over the settings and saw a correction factor (setting), is that something i could use to fix the speed showing on my cluster?
If not, is there a way to fix it?

Would appreciate some help.
Kr
Pnun92