I have a 1.8l freelander which i've used mostly for city driving. For the past 6 months i have been driving upcountry every week and the car has difficulty going over 120kph. At 120kph the revs are at 3500rpm and seems to be staining. Within city driving i have no problems since speed is not really an issue.
I should also point out that after going though the usual 1.8l k-series nightmares i swapped my engine with a 1.8l toyota 7aFE engine two years ago.. best decision i ever made. Towards the end, the original engine could manage 110kph at best. The current setup still uses the original wiring setup, MEMS controller and all sensors from LR, as well as the original PG1 type gearbox.
My question is, can i change the standard IRD in the 1.8l with the one from 2.5l v6 auto? I know the 1.8l IRD has a ratio of 1.467 : 1, and the v6 has a ratio of 1.359 : 1. How will the different gear ratios affect performance? I'm hoping that finally at 120kph the revs should be lower and hence improve efficiency and speed? correct me if i'm wrong.
Any help will be appreciated. Maybe someone has tried the IRD swap before?
I should also point out that after going though the usual 1.8l k-series nightmares i swapped my engine with a 1.8l toyota 7aFE engine two years ago.. best decision i ever made. Towards the end, the original engine could manage 110kph at best. The current setup still uses the original wiring setup, MEMS controller and all sensors from LR, as well as the original PG1 type gearbox.
My question is, can i change the standard IRD in the 1.8l with the one from 2.5l v6 auto? I know the 1.8l IRD has a ratio of 1.467 : 1, and the v6 has a ratio of 1.359 : 1. How will the different gear ratios affect performance? I'm hoping that finally at 120kph the revs should be lower and hence improve efficiency and speed? correct me if i'm wrong.
Any help will be appreciated. Maybe someone has tried the IRD swap before?