11-06-2012, 02:09 PM
You'll actually probably find it'll use more fuel in 6th because the efficiency isn't there at that low RPM... You'll end up labouring the engine... Especially if you put on a bigger turbo...
My car still returns 52-55mpg even on a DT box which is doing like 2750 at 70mph... It wouldn't return much better on a HDI box - That's because it's burning it's fuel 100% at those sorts of RPMs and the boost is continually there to make it burn completely.
I'd only change it if the ratios were closer between.
My car still returns 52-55mpg even on a DT box which is doing like 2750 at 70mph... It wouldn't return much better on a HDI box - That's because it's burning it's fuel 100% at those sorts of RPMs and the boost is continually there to make it burn completely.
I'd only change it if the ratios were closer between.
